Display_Purchase.java

import java.io.*;
import javax.swing.*;
public class Display_Purchase extends javax.swing.JFrame {

    /**
     * Creates new form Display_Purchase
     */
    public Display_Purchase() {
        initComponents();
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {

        jButton1 = new javax.swing.JButton();
        jLabel4 = new javax.swing.JLabel();
        jToggleButton1 = new javax.swing.JToggleButton();
        jPanel1 = new javax.swing.JPanel();
        jScrollPane1 = new javax.swing.JScrollPane();
        jTable1 = new javax.swing.JTable();
        jButton2 = new javax.swing.JButton();
        jTabbedPane1 = new javax.swing.JTabbedPane();
        jPanel2 = new javax.swing.JPanel();
        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        jTextField3 = new javax.swing.JTextField();
        jTextField4 = new javax.swing.JTextField();
        jTextField5 = new javax.swing.JTextField();
        jButton5 = new javax.swing.JButton();
        jButton6 = new javax.swing.JButton();
        jButton7 = new javax.swing.JButton();
        jTextField14 = new javax.swing.JTextField();
        jLabel7 = new javax.swing.JLabel();
        jPanel4 = new javax.swing.JPanel();
        jScrollPane2 = new javax.swing.JScrollPane();
        jTable2 = new javax.swing.JTable();
        jButton12 = new javax.swing.JButton();
        jButton13 = new javax.swing.JButton();
        jTextField10 = new javax.swing.JTextField();
        jTextField11 = new javax.swing.JTextField();
        jButton14 = new javax.swing.JButton();
        jButton15 = new javax.swing.JButton();
        jTextField12 = new javax.swing.JTextField();
        jTextField13 = new javax.swing.JTextField();
        jButton16 = new javax.swing.JButton();
        jButton17 = new javax.swing.JButton();
        jButton3 = new javax.swing.JButton();
        jButton4 = new javax.swing.JButton();
        jTextField1 = new javax.swing.JTextField();
        jTextField2 = new javax.swing.JTextField();
        jButton18 = new javax.swing.JButton();
        jLabel6 = new javax.swing.JLabel();
        jPanel5 = new javax.swing.JPanel();
        jTextField6 = new javax.swing.JTextField();
        jButton9 = new javax.swing.JButton();
        jButton10 = new javax.swing.JButton();
        jButton11 = new javax.swing.JButton();
        jTextField7 = new javax.swing.JTextField();
        jTextField8 = new javax.swing.JTextField();
        jTextField9 = new javax.swing.JTextField();
        jLabel5 = new javax.swing.JLabel();
        jButton8 = new javax.swing.JButton();

        jButton1.setText("jButton1");

        jLabel4.setText("jLabel4");

        jToggleButton1.setText("jToggleButton1");

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("Display_Add/Dlete_Update_Purchase");

        jPanel1.setBackground(new java.awt.Color(51, 75, 129));
        jPanel1.setBorder(javax.swing.BorderFactory.createBevelBorder(javax.swing.border.BevelBorder.RAISED, new java.awt.Color(0, 0, 0), new java.awt.Color(255, 51, 255)));

        jTable1.setBackground(new java.awt.Color(204, 204, 204));
        jTable1.setBorder(new javax.swing.border.SoftBevelBorder(javax.swing.border.BevelBorder.RAISED, new java.awt.Color(0, 0, 0), new java.awt.Color(255, 51, 204)));
        jTable1.setModel(new javax.swing.table.DefaultTableModel(
            new Object [][] {
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null}
            },
            new String [] {
                "Index No.", "Item", "Qty.", "Unit Price"
            }
        ) {
            boolean[] canEdit = new boolean [] {
                false, false, false, false
            };

            public boolean isCellEditable(int rowIndex, int columnIndex) {
                return canEdit [columnIndex];
            }
        });
        jTable1.getTableHeader().setReorderingAllowed(false);
        jScrollPane1.setViewportView(jTable1);
        if (jTable1.getColumnModel().getColumnCount() > 0) {
            jTable1.getColumnModel().getColumn(0).setPreferredWidth(10);
            jTable1.getColumnModel().getColumn(1).setPreferredWidth(150);
            jTable1.getColumnModel().getColumn(2).setResizable(false);
            jTable1.getColumnModel().getColumn(2).setPreferredWidth(10);
            jTable1.getColumnModel().getColumn(3).setPreferredWidth(10);
        }

        jButton2.setBackground(new java.awt.Color(51, 51, 51));
        jButton2.setFont(new java.awt.Font("Vani", 1, 24)); // NOI18N
        jButton2.setText("Display");
        jButton2.setBorder(new javax.swing.border.LineBorder(new java.awt.Color(0, 0, 0), 5, true));
        jButton2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton2ActionPerformed(evt);
            }
        });

        jTabbedPane1.setBackground(new java.awt.Color(39, 43, 63));
        jTabbedPane1.setBorder(javax.swing.BorderFactory.createBevelBorder(javax.swing.border.BevelBorder.RAISED, new java.awt.Color(0, 0, 0), new java.awt.Color(255, 51, 153)));
        jTabbedPane1.setForeground(new java.awt.Color(255, 51, 102));
        jTabbedPane1.setTabPlacement(javax.swing.JTabbedPane.LEFT);

        jPanel2.setBackground(new java.awt.Color(204, 204, 204));

        jLabel1.setBackground(new java.awt.Color(51, 51, 51));
        jLabel1.setFont(new java.awt.Font("Vani", 1, 14)); // NOI18N
        jLabel1.setText("Item:");
        jLabel1.setBorder(javax.swing.BorderFactory.createBevelBorder(javax.swing.border.BevelBorder.RAISED, new java.awt.Color(0, 0, 0), new java.awt.Color(255, 51, 153)));

        jLabel2.setBackground(new java.awt.Color(51, 51, 51));
        jLabel2.setFont(new java.awt.Font("Vani", 1, 14)); // NOI18N
        jLabel2.setText("Quantity:");
        jLabel2.setBorder(javax.swing.BorderFactory.createBevelBorder(javax.swing.border.BevelBorder.RAISED, new java.awt.Color(0, 0, 0), new java.awt.Color(255, 51, 153)));

        jLabel3.setBackground(new java.awt.Color(51, 51, 51));
        jLabel3.setFont(new java.awt.Font("Vani", 1, 14)); // NOI18N
        jLabel3.setText("Price:");
        jLabel3.setBorder(javax.swing.BorderFactory.createBevelBorder(javax.swing.border.BevelBorder.RAISED, new java.awt.Color(0, 0, 0), new java.awt.Color(255, 51, 204)));

        jTextField3.setBorder(javax.swing.BorderFactory.createBevelBorder(javax.swing.border.BevelBorder.RAISED, new java.awt.Color(0, 0, 0), new java.awt.Color(255, 51, 153)));
        jTextField3.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jTextField3ActionPerformed(evt);
            }
        });

        jTextField4.setBorder(javax.swing.BorderFactory.createBevelBorder(javax.swing.border.BevelBorder.RAISED, new java.awt.Color(0, 0, 0), new java.awt.Color(255, 51, 153)));
        jTextField4.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jTextField4ActionPerformed(evt);
            }
        });

        jTextField5.setBorder(javax.swing.BorderFactory.createBevelBorder(javax.swing.border.BevelBorder.RAISED, new java.awt.Color(0, 0, 0), new java.awt.Color(255, 51, 153)));
        jTextField5.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jTextField5ActionPerformed(evt);
            }
        });

        jButton5.setBackground(new java.awt.Color(68, 96, 147));
        jButton5.setFont(new java.awt.Font("Microsoft YaHei", 1, 14)); // NOI18N
        jButton5.setForeground(new java.awt.Color(255, 255, 255));
        jButton5.setText("Add");
        jButton5.setBorder(javax.swing.BorderFactory.createBevelBorder(javax.swing.border.BevelBorder.RAISED, new java.awt.Color(0, 0, 0), new java.awt.Color(51, 153, 255)));
        jButton5.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton5ActionPerformed(evt);
            }
        });

        jButton6.setBackground(new java.awt.Color(241, 25, 23));
        jButton6.setFont(new java.awt.Font("Tahoma", 1, 14)); // NOI18N
        jButton6.setForeground(new java.awt.Color(255, 255, 255));
        jButton6.setText("Delete");
        jButton6.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton6ActionPerformed(evt);
            }
        });

        jButton7.setBackground(new java.awt.Color(134, 66, 81));
        jButton7.setFont(new java.awt.Font("Vani", 1, 14)); // NOI18N
        jButton7.setForeground(new java.awt.Color(255, 255, 255));
        jButton7.setText("Clear");
        jButton7.setBorder(javax.swing.BorderFactory.createBevelBorder(javax.swing.border.BevelBorder.RAISED, new java.awt.Color(0, 0, 0), new java.awt.Color(51, 153, 255)));
        jButton7.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton7ActionPerformed(evt);
            }
        });

        jTextField14.setBackground(new java.awt.Color(242, 242, 242));
        jTextField14.setBorder(javax.swing.BorderFactory.createBevelBorder(javax.swing.border.BevelBorder.RAISED, new java.awt.Color(0, 0, 0), new java.awt.Color(255, 51, 153)));
        jTextField14.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jTextField14ActionPerformed(evt);
            }
        });

        jLabel7.setBackground(new java.awt.Color(51, 51, 51));
        jLabel7.setFont(new java.awt.Font("Vani", 1, 14)); // NOI18N
        jLabel7.setText("Item:");
        jLabel7.setBorder(javax.swing.BorderFactory.createBevelBorder(javax.swing.border.BevelBorder.RAISED, new java.awt.Color(0, 0, 0), new java.awt.Color(255, 51, 153)));

        javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
        jPanel2.setLayout(jPanel2Layout);
        jPanel2Layout.setHorizontalGroup(
            jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel2Layout.createSequentialGroup()
                .addContainerGap(78, Short.MAX_VALUE)
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addGroup(jPanel2Layout.createSequentialGroup()
                        .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addGroup(jPanel2Layout.createSequentialGroup()
                                .addComponent(jLabel7, javax.swing.GroupLayout.PREFERRED_SIZE, 56, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                                .addComponent(jTextField14, javax.swing.GroupLayout.PREFERRED_SIZE, 214, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                                .addComponent(jButton6, javax.swing.GroupLayout.PREFERRED_SIZE, 89, javax.swing.GroupLayout.PREFERRED_SIZE))
                            .addGroup(jPanel2Layout.createSequentialGroup()
                                .addComponent(jButton5, javax.swing.GroupLayout.PREFERRED_SIZE, 123, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addGap(78, 78, 78)
                                .addComponent(jButton7, javax.swing.GroupLayout.PREFERRED_SIZE, 115, javax.swing.GroupLayout.PREFERRED_SIZE)))
                        .addGap(37, 37, 37))
                    .addGroup(jPanel2Layout.createSequentialGroup()
                        .addComponent(jLabel3, javax.swing.GroupLayout.PREFERRED_SIZE, 76, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(31, 31, 31)
                        .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addComponent(jTextField5, javax.swing.GroupLayout.DEFAULT_SIZE, 205, Short.MAX_VALUE)
                            .addComponent(jTextField4)
                            .addComponent(jTextField3))
                        .addGap(79, 79, 79))))
            .addGroup(jPanel2Layout.createSequentialGroup()
                .addGap(90, 90, 90)
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                    .addComponent(jLabel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(jLabel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
        jPanel2Layout.setVerticalGroup(
            jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel2Layout.createSequentialGroup()
                .addGap(74, 74, 74)
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jTextField3, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jLabel1))
                .addGap(40, 40, 40)
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jTextField4, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jLabel2))
                .addGap(42, 42, 42)
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jTextField5, javax.swing.GroupLayout.PREFERRED_SIZE, 31, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jLabel3))
                .addGap(37, 37, 37)
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jButton5, javax.swing.GroupLayout.PREFERRED_SIZE, 39, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jButton7, javax.swing.GroupLayout.PREFERRED_SIZE, 39, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addContainerGap(156, Short.MAX_VALUE))
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel2Layout.createSequentialGroup()
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel7, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jTextField14, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jButton6, javax.swing.GroupLayout.PREFERRED_SIZE, 33, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(86, 86, 86))
        );

        jTabbedPane1.addTab("Add/Delete", jPanel2);

        jPanel4.setBackground(new java.awt.Color(204, 204, 204));
        jPanel4.setBorder(javax.swing.BorderFactory.createBevelBorder(javax.swing.border.BevelBorder.RAISED, new java.awt.Color(0, 0, 0), new java.awt.Color(255, 51, 102)));
        jPanel4.setForeground(new java.awt.Color(255, 255, 255));

        jTable2.setModel(new javax.swing.table.DefaultTableModel(
            new Object [][] {
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null}
            },
            new String [] {
                "Qty.", "Item", "Unit Price", "Total Price"
            }
        ) {
            Class[] types = new Class [] {
                java.lang.Integer.class, java.lang.String.class, java.lang.Double.class, java.lang.Double.class
            };
            boolean[] canEdit = new boolean [] {
                false, false, false, false
            };

            public Class getColumnClass(int columnIndex) {
                return types [columnIndex];
            }

            public boolean isCellEditable(int rowIndex, int columnIndex) {
                return canEdit [columnIndex];
            }
        });
        jTable2.getTableHeader().setReorderingAllowed(false);
        jScrollPane2.setViewportView(jTable2);
        if (jTable2.getColumnModel().getColumnCount() > 0) {
            jTable2.getColumnModel().getColumn(0).setPreferredWidth(10);
            jTable2.getColumnModel().getColumn(1).setPreferredWidth(150);
            jTable2.getColumnModel().getColumn(2).setPreferredWidth(10);
            jTable2.getColumnModel().getColumn(3).setPreferredWidth(10);
        }

        jButton12.setText("No. of items :");
        jButton12.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton12ActionPerformed(evt);
            }
        });

        jButton13.setText("Cash :");
        jButton13.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton13ActionPerformed(evt);
            }
        });

        jTextField10.setEditable(false);
        jTextField10.setBackground(new java.awt.Color(255, 255, 255));
        jTextField10.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jTextField10ActionPerformed(evt);
            }
        });

        jTextField11.setEditable(false);
        jTextField11.setBackground(new java.awt.Color(255, 255, 255));

        jButton14.setText("Total Price :");
        jButton14.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton14ActionPerformed(evt);
            }
        });

        jButton15.setText("Change :");
        jButton15.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton15ActionPerformed(evt);
            }
        });

        jTextField12.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jTextField12ActionPerformed(evt);
            }
        });

        jTextField13.setEditable(false);
        jTextField13.setBackground(new java.awt.Color(255, 255, 255));

        jButton16.setBackground(new java.awt.Color(94, 128, 121));
        jButton16.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
        jButton16.setText("Pay");
        jButton16.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton16ActionPerformed(evt);
            }
        });

        jButton17.setBackground(new java.awt.Color(188, 20, 34));
        jButton17.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
        jButton17.setText("Clear");
        jButton17.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton17ActionPerformed(evt);
            }
        });

        jButton3.setFont(new java.awt.Font("Vani", 1, 10)); // NOI18N
        jButton3.setText("Index No.");
        jButton3.setBorder(javax.swing.BorderFactory.createBevelBorder(javax.swing.border.BevelBorder.RAISED, new java.awt.Color(0, 0, 0), new java.awt.Color(51, 153, 255)));

        jButton4.setFont(new java.awt.Font("Vani", 1, 12)); // NOI18N
        jButton4.setText("Quantity :");
        jButton4.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton4ActionPerformed(evt);
            }
        });

        jTextField1.setBackground(new java.awt.Color(242, 242, 242));
        jTextField1.setBorder(javax.swing.BorderFactory.createBevelBorder(javax.swing.border.BevelBorder.RAISED, new java.awt.Color(0, 0, 0), new java.awt.Color(255, 51, 153)));

        jTextField2.setBorder(javax.swing.BorderFactory.createBevelBorder(javax.swing.border.BevelBorder.RAISED, new java.awt.Color(0, 0, 0), new java.awt.Color(255, 51, 153)));
        jTextField2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jTextField2ActionPerformed(evt);
            }
        });

        jButton18.setBackground(new java.awt.Color(153, 153, 153));
        jButton18.setFont(new java.awt.Font("Vani", 1, 18)); // NOI18N
        jButton18.setText("Purchase");
        jButton18.setBorder(javax.swing.BorderFactory.createBevelBorder(javax.swing.border.BevelBorder.RAISED, new java.awt.Color(0, 0, 0), new java.awt.Color(51, 153, 255)));
        jButton18.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton18ActionPerformed(evt);
            }
        });

        jLabel6.setFont(new java.awt.Font("Vani", 1, 24)); // NOI18N

        javax.swing.GroupLayout jPanel4Layout = new javax.swing.GroupLayout(jPanel4);
        jPanel4.setLayout(jPanel4Layout);
        jPanel4Layout.setHorizontalGroup(
            jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel4Layout.createSequentialGroup()
                .addGroup(jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(jPanel4Layout.createSequentialGroup()
                        .addContainerGap()
                        .addGroup(jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addGroup(jPanel4Layout.createSequentialGroup()
                                .addGroup(jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                    .addGroup(jPanel4Layout.createSequentialGroup()
                                        .addGroup(jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                                            .addComponent(jButton13, javax.swing.GroupLayout.PREFERRED_SIZE, 91, javax.swing.GroupLayout.PREFERRED_SIZE)
                                            .addComponent(jButton12))
                                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                                        .addGroup(jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                            .addComponent(jTextField11, javax.swing.GroupLayout.PREFERRED_SIZE, 73, javax.swing.GroupLayout.PREFERRED_SIZE)
                                            .addComponent(jTextField10, javax.swing.GroupLayout.PREFERRED_SIZE, 73, javax.swing.GroupLayout.PREFERRED_SIZE)))
                                    .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel4Layout.createSequentialGroup()
                                        .addGap(0, 0, Short.MAX_VALUE)
                                        .addComponent(jButton16, javax.swing.GroupLayout.PREFERRED_SIZE, 135, javax.swing.GroupLayout.PREFERRED_SIZE)))
                                .addGroup(jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                    .addGroup(jPanel4Layout.createSequentialGroup()
                                        .addGap(39, 39, 39)
                                        .addGroup(jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                            .addGroup(jPanel4Layout.createSequentialGroup()
                                                .addComponent(jButton14)
                                                .addGap(18, 18, 18)
                                                .addComponent(jTextField12, javax.swing.GroupLayout.PREFERRED_SIZE, 94, javax.swing.GroupLayout.PREFERRED_SIZE))
                                            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel4Layout.createSequentialGroup()
                                                .addComponent(jButton15, javax.swing.GroupLayout.PREFERRED_SIZE, 83, javax.swing.GroupLayout.PREFERRED_SIZE)
                                                .addGap(18, 18, 18)
                                                .addComponent(jTextField13, javax.swing.GroupLayout.PREFERRED_SIZE, 94, javax.swing.GroupLayout.PREFERRED_SIZE))))
                                    .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel4Layout.createSequentialGroup()
                                        .addComponent(jButton17, javax.swing.GroupLayout.PREFERRED_SIZE, 112, javax.swing.GroupLayout.PREFERRED_SIZE)
                                        .addGap(53, 53, 53))))
                            .addGroup(jPanel4Layout.createSequentialGroup()
                                .addComponent(jButton3, javax.swing.GroupLayout.PREFERRED_SIZE, 82, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                                .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, 98, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                                .addComponent(jButton4, javax.swing.GroupLayout.PREFERRED_SIZE, 104, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                                .addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, 109, javax.swing.GroupLayout.PREFERRED_SIZE))
                            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel4Layout.createSequentialGroup()
                                .addComponent(jLabel6)
                                .addGap(227, 227, 227))
                            .addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
                    .addGroup(jPanel4Layout.createSequentialGroup()
                        .addGap(177, 177, 177)
                        .addComponent(jButton18)))
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
        jPanel4Layout.setVerticalGroup(
            jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel4Layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                    .addGroup(jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                        .addComponent(jButton4)
                        .addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, 23, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addComponent(jButton3, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(jTextField1))
                .addGap(26, 26, 26)
                .addComponent(jButton18, javax.swing.GroupLayout.PREFERRED_SIZE, 26, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(18, 18, 18)
                .addComponent(jLabel6, javax.swing.GroupLayout.PREFERRED_SIZE, 26, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 201, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(29, 29, 29)
                .addGroup(jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jButton12)
                    .addComponent(jTextField10, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jButton14)
                    .addComponent(jTextField12, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addGroup(jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jButton13)
                    .addComponent(jTextField11, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jButton15)
                    .addComponent(jTextField13, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(18, 18, 18)
                .addGroup(jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jButton16)
                    .addComponent(jButton17))
                .addGap(58, 58, 58))
        );

        jTabbedPane1.addTab(" Purchase", jPanel4);

        jPanel5.setBackground(new java.awt.Color(204, 204, 204));
        jPanel5.setBorder(javax.swing.BorderFactory.createBevelBorder(javax.swing.border.BevelBorder.RAISED, new java.awt.Color(0, 0, 0), new java.awt.Color(255, 51, 153)));

        jTextField6.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jTextField6ActionPerformed(evt);
            }
        });

        jButton9.setText("Change Item Name :");
        jButton9.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton9ActionPerformed(evt);
            }
        });

        jButton10.setText("Quantity :");
        jButton10.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton10ActionPerformed(evt);
            }
        });

        jButton11.setText("Price :");
        jButton11.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton11ActionPerformed(evt);
            }
        });

        jTextField7.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jTextField7ActionPerformed(evt);
            }
        });

        jTextField8.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jTextField8ActionPerformed(evt);
            }
        });

        jTextField9.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jTextField9ActionPerformed(evt);
            }
        });

        jLabel5.setText("Item :");

        jButton8.setBackground(new java.awt.Color(0, 204, 204));
        jButton8.setFont(new java.awt.Font("Segoe UI", 1, 18)); // NOI18N
        jButton8.setText("Save Changes");
        jButton8.setBorder(new javax.swing.border.SoftBevelBorder(javax.swing.border.BevelBorder.RAISED, null, new java.awt.Color(204, 204, 204), null, null));
        jButton8.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton8ActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout jPanel5Layout = new javax.swing.GroupLayout(jPanel5);
        jPanel5.setLayout(jPanel5Layout);
        jPanel5Layout.setHorizontalGroup(
            jPanel5Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel5Layout.createSequentialGroup()
                .addGap(39, 39, 39)
                .addGroup(jPanel5Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addGroup(jPanel5Layout.createSequentialGroup()
                        .addGap(0, 63, Short.MAX_VALUE)
                        .addComponent(jLabel5, javax.swing.GroupLayout.PREFERRED_SIZE, 42, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(jTextField6, javax.swing.GroupLayout.PREFERRED_SIZE, 259, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(35, 35, 35))
                    .addGroup(jPanel5Layout.createSequentialGroup()
                        .addGroup(jPanel5Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addComponent(jButton11, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addComponent(jButton10, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addComponent(jButton9, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addGroup(jPanel5Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(jTextField9)
                            .addComponent(jTextField8)
                            .addComponent(jTextField7))))
                .addGap(50, 50, 50))
            .addGroup(jPanel5Layout.createSequentialGroup()
                .addGap(152, 152, 152)
                .addComponent(jButton8, javax.swing.GroupLayout.PREFERRED_SIZE, 154, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
        jPanel5Layout.setVerticalGroup(
            jPanel5Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel5Layout.createSequentialGroup()
                .addGap(26, 26, 26)
                .addGroup(jPanel5Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jTextField6, javax.swing.GroupLayout.PREFERRED_SIZE, 31, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jLabel5))
                .addGap(58, 58, 58)
                .addGroup(jPanel5Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                    .addComponent(jButton9, javax.swing.GroupLayout.DEFAULT_SIZE, 45, Short.MAX_VALUE)
                    .addComponent(jTextField7))
                .addGap(32, 32, 32)
                .addGroup(jPanel5Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jButton10, javax.swing.GroupLayout.PREFERRED_SIZE, 40, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jTextField8, javax.swing.GroupLayout.PREFERRED_SIZE, 40, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(27, 27, 27)
                .addGroup(jPanel5Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jButton11, javax.swing.GroupLayout.PREFERRED_SIZE, 39, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jTextField9, javax.swing.GroupLayout.PREFERRED_SIZE, 39, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(56, 56, 56)
                .addComponent(jButton8, javax.swing.GroupLayout.PREFERRED_SIZE, 45, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(83, Short.MAX_VALUE))
        );

        jTabbedPane1.addTab("Update", jPanel5);

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addGap(135, 135, 135)
                        .addComponent(jButton2, javax.swing.GroupLayout.PREFERRED_SIZE, 141, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(0, 185, Short.MAX_VALUE))
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addContainerGap()
                        .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 0, Short.MAX_VALUE)))
                .addGap(18, 18, 18)
                .addComponent(jTabbedPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 569, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap())
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jTabbedPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 0, Short.MAX_VALUE)
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 265, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(34, 34, 34)
                        .addComponent(jButton2, javax.swing.GroupLayout.PREFERRED_SIZE, 43, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addContainerGap(149, Short.MAX_VALUE))))
        );

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        );

        pack();
    }// </editor-fold>//GEN-END:initComponents

    private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton2ActionPerformed
    // Display Button
        
        try {
                for (int r = 0; r < 100; r++) { //initializing row
                    for (int c = 0; c < 4; c++) { //initializing column
                        jTable1.setValueAt(null, r, c);
                    }
                }

                BufferedReader rdfile = new BufferedReader(new FileReader("items.txt"));

                String[] item = new String[100];
                String[] temp;

                int x = 0;  //read item
                while ((item[x] = rdfile.readLine()) != null) {
                    temp = item[x].split("\t");
                    jTable1.setValueAt((1000 + x + 1), x, 0);
                    for (int j = 1; j < 4; j++) {
                        jTable1.setValueAt(temp[j - 1], x, j);
                    }

                    x++;
                }
                rdfile.close();

            } catch (IOException e) {
            }
        
    }//GEN-LAST:event_jButton2ActionPerformed

    private void jButton18ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton18ActionPerformed
        //Purchase Button

        try {
            BufferedReader rdfile = new BufferedReader(new FileReader("items.txt"));
            String[] itemline = new String[100];
            String str;
            double price, total;
            int qty = 0, qty_prv = 0, qty_new = 0;
            boolean found = false, edited = false;
            int idx = (Integer.parseInt(jTextField1.getText())) - 1001;

            for (int x = 0; (str = rdfile.readLine()) != null; x++) {
                itemline[x] = str;
            }
            rdfile.close();


            int r = Row.getRow();
            for (int i = 0; itemline[i] != null; i++) {
                if (idx == i) {
                    found = true;
                    String[] temp = itemline[i].split("\t");
                    qty = Integer.parseInt(jTextField2.getText());
                    qty_prv = Integer.parseInt(temp[1]);
                    if ((qty > qty_prv) && (qty_prv != 0)) {
                        JOptionPane.showMessageDialog(null, "Item Shortage!", "Oops!", JOptionPane.WARNING_MESSAGE);
                    }
                    if (qty_prv == 0) {
                        JOptionPane.showMessageDialog(null, "Out of Stock!", "Oops!", JOptionPane.WARNING_MESSAGE);
                    }
                    if ((qty <= qty_prv) && (qty_prv != 0)) {
                        qty_new = qty_prv - qty;
                        itemline[i] = temp[0] + "\t" + qty_new + "\t" + temp[2];
                        jTable2.setValueAt(qty, r, 0);
                        jTable2.setValueAt(temp[0], r, 1);
                        jTable2.setValueAt(Double.parseDouble(temp[2]), r, 2);
                        price = Double.parseDouble(temp[2]);
                        total = qty * price;
                        jTable2.setValueAt(total, r, 3);
                        r++;
                        edited = true;
                    }
                }

            }

            if (!found) {
                JOptionPane.showMessageDialog(null, jTextField1.getText() + ": Item Not Available!", "Oops!", JOptionPane.ERROR_MESSAGE);
            }
            if (edited) {
                PrintWriter wrfile = new PrintWriter(new FileWriter("items.txt"));
                for (int i = 0; itemline[i] != null; i++) {
                    wrfile.println(itemline[i]);
                }
                jButton16.setEnabled(true);
                wrfile.close();
                Row.setRow();
            }
            jTextField1.setText("");
            jTextField2.setText("");

        } catch (IOException e) {
        } catch (NumberFormatException e) {
            JOptionPane.showMessageDialog(null, "Some input may be invalid!", "Oops!", JOptionPane.ERROR_MESSAGE);

            jTextField1.setText("");
            jTextField2.setText("");
        }
    }//GEN-LAST:event_jButton18ActionPerformed

    private void jTextField2ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jTextField2ActionPerformed
        jButton18ActionPerformed(evt);
    }//GEN-LAST:event_jTextField2ActionPerformed

    private void jButton17ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton17ActionPerformed
        //Clear Button(Purchase)

        for (int r = 0; r < 100; r++) //initializing row
        {
            for (int c = 0; c < 4; c++) //initializing column
            {
                jTable2.setValueAt(null, r, c);
            }
        }
        jButton16.setEnabled(true);
        jTextField10.setText("");
        jTextField11.setText("");
        jTextField12.setText("");
        jTextField13.setText("");
        Row.setRow(0);
        jButton18.setEnabled(true);
    }//GEN-LAST:event_jButton17ActionPerformed

    private void jButton16ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton16ActionPerformed
        //Pay Button(Purchase)

        try {
            int itms = 0, tmp;
            for (int r = 0; jTable2.getValueAt(r, 0) != null; r++) {
                tmp = Integer.parseInt("" + jTable2.getValueAt(r, 0));
                itms += tmp;
            }
            jTextField10.setText("" + itms);
            double total = 0, tmp2;
            for (int r = 0; jTable2.getValueAt(r, 3) != null; r++) {
                tmp2 = Double.parseDouble("" + jTable2.getValueAt(r, 3));
                total += tmp2;
            }
            jTextField12.setText("" + total);


            double cash, change;
            do {
                cash = Double.parseDouble(JOptionPane.showInputDialog("Cash Payment:"));
                if (cash < total) {
                    JOptionPane.showMessageDialog(null, "Insufficient Cash!", null, JOptionPane.WARNING_MESSAGE);
                }

            } while (cash < total);
            jTextField11.setText("" + cash);
            jTextField13.setText("" + (cash - total));
            jButton18.setEnabled(false);

        } catch (NumberFormatException e) {
            JOptionPane.showMessageDialog(null, "Invalid!", "", JOptionPane.ERROR_MESSAGE);
        }
    }//GEN-LAST:event_jButton16ActionPerformed

    private void jTextField12ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jTextField12ActionPerformed
        // TODO add your handling code here:
    }//GEN-LAST:event_jTextField12ActionPerformed

    private void jTextField10ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jTextField10ActionPerformed
        // TODO add your handling code here:
    }//GEN-LAST:event_jTextField10ActionPerformed

    private void jTextField14ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jTextField14ActionPerformed
        jButton6ActionPerformed(evt);
    }//GEN-LAST:event_jTextField14ActionPerformed

    private void jButton7ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton7ActionPerformed
        //Clear Button(Add/Delete)
        
        jTextField3.setText("");
        jTextField4.setText("");
        jTextField5.setText("");
    }//GEN-LAST:event_jButton7ActionPerformed

    private void jButton6ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton6ActionPerformed
        //Delete Button

        try {
            if (jTextField14.getText().equals(""))
                JOptionPane.showMessageDialog(null, "Enter item!", "Oops Wait...!", JOptionPane.ERROR_MESSAGE);
             else {
                BufferedReader rdfile = new BufferedReader(new FileReader("items.txt"));

                String[] itemline = new String[100];
                String[] temp;
                String delete = jTextField14.getText();
                boolean found = false;

                int x = 0;
                while ((itemline[x] = rdfile.readLine()) != null) {
                    temp = itemline[x].split("\t");

                    if (delete.equals(temp[0])) {
                        x = x + 0;
                        found = true;
                    } else 
                        x++;

                }

                rdfile.close();

                PrintWriter wrfile = new PrintWriter(new FileWriter("items.txt"));
                for (int j = 0; itemline[j] != null; j++) 
                    wrfile.println(itemline[j]);
                

                wrfile.close();

                if (!found) 
                    JOptionPane.showMessageDialog(null, "Item is already not in the list!", "Ooops!", JOptionPane.ERROR_MESSAGE);
                 else 
                    JOptionPane.showMessageDialog(null, "Succesfully Deleted!", "Ok!  :-)", JOptionPane.INFORMATION_MESSAGE);
                

                jTextField14.setText("");

            }
        } catch (IOException e) {}
    }//GEN-LAST:event_jButton6ActionPerformed

    private void jButton5ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton5ActionPerformed
        // Add Button

        try {
            if (jTextField3.getText().equals("")) {
                JOptionPane.showMessageDialog(null, "Enter item!", "Oops Wait...!", JOptionPane.ERROR_MESSAGE);
            } else {
                BufferedReader rdfile = new BufferedReader(new FileReader("items.txt"));

                String[] itemline = new String[100];
                String prod = "";
                int qty = 0;
                double price = 0.0;
                boolean found = false;

                int x = 0;
                while ((itemline[x] = rdfile.readLine()) != null) {
                    x++;
                }
                rdfile.close();



                if (!(x >= 100)) {
                    prod = jTextField3.getText();

                    for (int j = 0; itemline[j] != null; j++) {      //check whether item is in the list already
                        String[] temp = itemline[j].split("\t");

                        if (prod.equals(temp[0])) {
                            found = true;
                        }
                    }

                    if (found) {
                        JOptionPane.showMessageDialog(null, "Item already exist!\nSuggestion: Update Item", "", JOptionPane.WARNING_MESSAGE);
                    } else {
                        qty = Integer.parseInt(jTextField4.getText());
                        price = Double.parseDouble(jTextField5.getText());

                        itemline[x] = prod + "\t" + qty + "\t" + price;

                        PrintWriter wrfile = new PrintWriter(new FileWriter("items.txt"));

                        for (int j = 0; itemline[j] != null; j++) {
                            wrfile.println(itemline[j]);
                        }

                        wrfile.close();

                        JOptionPane.showMessageDialog(null, "Succesfully Added!", " Ok!  :-)", JOptionPane.INFORMATION_MESSAGE);
                    }
                } else {
                    JOptionPane.showMessageDialog(null, "Inventory Full!", "Warning!", JOptionPane.WARNING_MESSAGE);
                }
            }

            jTextField3.setText("");
            jTextField4.setText("");
            jTextField5.setText("");

        } catch (IOException e) {
        } catch (NumberFormatException e) {
            JOptionPane.showMessageDialog(null, "Some input may be invalid!", "Warning!", JOptionPane.WARNING_MESSAGE);

            jTextField3.setText("");
            jTextField4.setText("");
            jTextField5.setText("");
        }
    }//GEN-LAST:event_jButton5ActionPerformed

    private void jTextField5ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jTextField5ActionPerformed
        // TODO add your handling code here:
    }//GEN-LAST:event_jTextField5ActionPerformed

    private void jTextField4ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jTextField4ActionPerformed
        // TODO add your handling code here:
    }//GEN-LAST:event_jTextField4ActionPerformed

    private void jTextField6ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jTextField6ActionPerformed
        // TODO add your handling code here:
    }//GEN-LAST:event_jTextField6ActionPerformed

    private void jTextField7ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jTextField7ActionPerformed
         jButton8ActionPerformed(evt);
    }//GEN-LAST:event_jTextField7ActionPerformed

    private void jTextField8ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jTextField8ActionPerformed
         jButton8ActionPerformed(evt);
    }//GEN-LAST:event_jTextField8ActionPerformed

    private void jButton8ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton8ActionPerformed
        // Save Changes(Update)
        
         try{
            if( jTextField6.getText().equals(""))
                JOptionPane.showMessageDialog(null, "Enter item!", "Ooops Wait...!", JOptionPane.ERROR_MESSAGE);
           
            else{
                BufferedReader rdfile= new BufferedReader( new FileReader("items.txt"));

                String[] itemline= new String[100];
                String temp[];
                String search= "", prod="", Qty="", Price="";
                search= jTextField6.getText();
                int qty=0, x=0; double price=0.0;
                boolean found= false;

                prod= jTextField7.getText();
                Qty= jTextField8.getText();
                Price= jTextField9.getText();
                if( (!(prod.equals(""))) || (!(Qty.equals(""))) || (!(Price.equals(""))) ){
                    while(( itemline[x]= rdfile.readLine()) != null){
                        temp= itemline[x].split("\t");

                        if( search.equals( temp[0])){
                            if( prod.equals(""))
                                prod= temp[0];
                            if( Qty.equals(""))
                                qty= Integer.parseInt(temp[1]);
                            else
                                qty= Integer.parseInt( Qty )+ Integer.parseInt(temp[1]);

                            if( Price.equals(""))
                                price= Double.parseDouble(temp[2]);
                            else
                                price= Double.parseDouble( Price);

                            itemline[x]= prod+"\t"+qty+"\t"+price;
                            found= true;
                        }
                        x++;


                    }
                    rdfile.close();

                    if( found ){
                        PrintWriter wrfile= new PrintWriter( new FileWriter("items.txt"));

                        for( int j=0; itemline[j] != null; j++)
                            wrfile.println( itemline[j]);

                        wrfile.close();

                        JOptionPane.showMessageDialog(null, "Changes Saved!");
                    } else
                        JOptionPane.showMessageDialog(null, "Item Not Found!");

                    jTextField6.setText("");
                    jTextField7.setText("");
                    jTextField8.setText("");
                    jTextField9.setText("");
                    
                    } else
                    JOptionPane.showMessageDialog( null, "No Changes Yet!");
            }
                
        }catch(IOException e){} catch(NumberFormatException e){
            JOptionPane.showMessageDialog(null, "Some input may be invalid!");
            
                    jTextField6.setText("");
                    jTextField7.setText("");
                    jTextField8.setText("");
                    jTextField9.setText("");
        }
    
    }//GEN-LAST:event_jButton8ActionPerformed

    private void jTextField9ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jTextField9ActionPerformed
         jButton8ActionPerformed(evt);
    }//GEN-LAST:event_jTextField9ActionPerformed

    private void jTextField3ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jTextField3ActionPerformed
        // TODO add your handling code here:
    }//GEN-LAST:event_jTextField3ActionPerformed

    private void jButton10ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton10ActionPerformed
        // TODO add your handling code here:
    }//GEN-LAST:event_jButton10ActionPerformed

    private void jButton11ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton11ActionPerformed
        // TODO add your handling code here:
    }//GEN-LAST:event_jButton11ActionPerformed

    private void jButton9ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton9ActionPerformed
        // TODO add your handling code here:
    }//GEN-LAST:event_jButton9ActionPerformed

    private void jButton13ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton13ActionPerformed
        // TODO add your handling code here:
    }//GEN-LAST:event_jButton13ActionPerformed

    private void jButton12ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton12ActionPerformed
        // TODO add your handling code here:
    }//GEN-LAST:event_jButton12ActionPerformed

    private void jButton14ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton14ActionPerformed
        // TODO add your handling code here:
    }//GEN-LAST:event_jButton14ActionPerformed

    private void jButton15ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton15ActionPerformed
        // TODO add your handling code here:
    }//GEN-LAST:event_jButton15ActionPerformed

    private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton4ActionPerformed
        // TODO add your handling code here:
    }//GEN-LAST:event_jButton4ActionPerformed
                                    
    public static void main(String args[]) {  
        /*
         * Set the Nimbus look and feel
         */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /*
         * If Nimbus (introduced in Java SE 6) is not available, stay with the
         * default look and feel. For details see
         * http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(Display_Purchase.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(Display_Purchase.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(Display_Purchase.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(Display_Purchase.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /*
         * Create and display the form
         */
        java.awt.EventQueue.invokeLater(new Runnable() {

            public void run() {
                new Display_Purchase().setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JButton jButton1;
    private javax.swing.JButton jButton10;
    private javax.swing.JButton jButton11;
    private javax.swing.JButton jButton12;
    private javax.swing.JButton jButton13;
    private javax.swing.JButton jButton14;
    private javax.swing.JButton jButton15;
    private javax.swing.JButton jButton16;
    private javax.swing.JButton jButton17;
    private javax.swing.JButton jButton18;
    private javax.swing.JButton jButton2;
    private javax.swing.JButton jButton3;
    private javax.swing.JButton jButton4;
    private javax.swing.JButton jButton5;
    private javax.swing.JButton jButton6;
    private javax.swing.JButton jButton7;
    private javax.swing.JButton jButton8;
    private javax.swing.JButton jButton9;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JLabel jLabel5;
    private javax.swing.JLabel jLabel6;
    private javax.swing.JLabel jLabel7;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JPanel jPanel2;
    private javax.swing.JPanel jPanel4;
    private javax.swing.JPanel jPanel5;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JScrollPane jScrollPane2;
    private javax.swing.JTabbedPane jTabbedPane1;
    private javax.swing.JTable jTable1;
    private javax.swing.JTable jTable2;
    private javax.swing.JTextField jTextField1;
    private javax.swing.JTextField jTextField10;
    private javax.swing.JTextField jTextField11;
    private javax.swing.JTextField jTextField12;
    private javax.swing.JTextField jTextField13;
    private javax.swing.JTextField jTextField14;
    private javax.swing.JTextField jTextField2;
    private javax.swing.JTextField jTextField3;
    private javax.swing.JTextField jTextField4;
    private javax.swing.JTextField jTextField5;
    private javax.swing.JTextField jTextField6;
    private javax.swing.JTextField jTextField7;
    private javax.swing.JTextField jTextField8;
    private javax.swing.JTextField jTextField9;
    private javax.swing.JToggleButton jToggleButton1;
    // End of variables declaration//GEN-END:variables
}