Java Swing: how to update a JTable model from another page

Question

I have 2 windows in one window that show model data JTable, when double click on a line, a new window for editing data will appear, after sending send, how can I update JTable?

Customer.java:

JPanel getJPanel() {
    if (jPanel == null) {

        jPanel = new JPanel();
        jPanel.setLayout(null);
        jPanel.setSize(new Dimension(792, 420));
        jPanel.add(getJScrollPane(), null);
        setUpTableData();
    }
   JScrollPane getJScrollPane() {
    if (jScrollPane == null) {
        jScrollPane = new JScrollPane();
        jScrollPane.setBounds(new Rectangle(20, 166, 759, 241));
        jScrollPane.setViewportView(getJTable());
    }
    return jScrollPane;
}

   JTable getJTable() {
    if (jTable == null) {
        jTable = new JTable();
        jTable.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent e) {
                new ContactEdit(name,email,phoneNo,phoneNo2,id).getJInternalFrame().setVisible(true);
                }
            }
        });
        DefaultTableModel tableModel = (DefaultTableModel) jTable.getModel();
        String[] colName = {"No." ,"Name", "Email","Contact No. 1","Contact No. 2","ID"};
        tableModel.setColumnIdentifiers(colName);
        jTable.getTableHeader().setBackground(Color.WHITE);
        jTable.getTableHeader().setForeground(Color.BLUE);
        Font Tablefont = new Font("DialogInput",Font.BOLD,12); 
        jTable.getTableHeader().setFont(Tablefont);

    }
    return jTable;
}
   public void setUpTableData() {
    DefaultTableModel tableModel = (DefaultTableModel) jTable.getModel();
    ArrayList<Address> list = sql.getContactLists();
    int i = 0;
    for (i = 0; i < list.size(); i++) {
        String[] bill = new String[6];
        for (int j = 0; j < 6; j += 6) {
            bill[j] = Integer.toString(i);
            bill[j + 1] = list.get(i).getName();
            bill[j + 2] = list.get(i).getEmail();
            bill[j + 3] = list.get(i).getPhoneNo();
            bill[j + 4] = list.get(i).getPhoneNo2();
            bill[j + 5] = list.get(i).getId();
        }
        tableModel.addRow(bill);
    }
    jTable.setModel(tableModel);
}

Edit.java

private JButton getJButton() {
    if (jButton == null) {
        jButton = new JButton();
        jButton.setBounds(new Rectangle(155, 138, 85, 25));
        jButton.setText("Update");
        jButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent e) {
                Address a = new Address(jTextField1.getText(),jTextField.getText(),jTextField3.getText(),jTextField2.getText(),"");
                                    sql.updateContact(a, Integer.parseInt(getJTextField4().getText()));                 
                            Customer c = new Customer();
                            c.setUpTableData();
                getJInternalFrame().setVisible(false);
                getJInternalFrame().dispose();
            }
        });
    }
    return jButton;
}

On JPanelDownload will call this one setUpTableDatato retrieve data from the database. In the edit window, I added an action listener to the refresh button to update the table, but I don't know how to make jTable update the updated data? SetUpTableData on ActionListenergives me a Null Pointer.

Answer 1

JPanel. ( , ). setUpTableData() ActionListener.

:

public EditFrame(CustomerListFrame cListFrame, ... other params) {
    this.cListFrame = cListFrame;
}

ActionListener

public void actionPerforment(ActionEvent e) {
    cListFrame.setUpTableData(the new data);
}