GridBagLayout on top of other layout manager

Question

Hi,
I am trying to put a GridBagLayout within a GridLayout and it is not showing up. What's wrong?
Thanks,
Steve
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class TestButton {
    public static void main(String[] arguments) {
        JFrame frame = new Interface();
        frame.show();
class Interface extends JFrame {
     private dataPanel screenvar;
     private JTextArea msgout;
     Interface () {
          super("This is a JFrame");
        setSize(600, 200);  // width, height
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          JPanel pane = new JPanel();
          // create empty space
          pane.setBorder(BorderFactory.createEmptyBorder(30, 30, 10, 30)); //top, left, bottom, right
          // declare components
          msgout = new JTextArea( 8, 40 );
          dataPanel screenvar = new dataPanel();
          NamePass testGrid = new NamePass();
          // end declare components
          pane.setLayout(new GridLayout(1, 4, 5, 15));  
          pane.add(testGrid);
          pane.add(msgout);
             pane.add( new JScrollPane(msgout));
          pane.add(screenvar);
          msgout.append("Successful");
          setContentPane(pane);
          setVisible(true);
class updateDataFields implements ActionListener {     // 400
     private dataPanel abc;
     private JTextArea msg;
     public updateDataFields(dataPanel xyz, JTextArea msgout) {     // 100
          abc = xyz;
          msg = msgout;
     }     // 100
     public void actionPerformed(ActionEvent evt) {     // 200
          String command = evt.getActionCommand();
               if (command.equals("TestMe")){     // 300
                    msg.append("\nSuccessful");
                    abc.right01.setText("1000");
                    abc.left02.setText("Hi!");
                    abc.right03.setText("123456");
               }     // 300
     }     // 200
}     // 400
class dataPanel extends JPanel {
     JLabel left1, left2, left3, right1, right2, right3;
     JTextField left01, left02, left03, right01, right02, right03;
    public dataPanel () {     // 1
          GridLayout grid = new GridLayout(3, 2, 5, 15); // row, col, hgap, vgap
          setLayout(grid);
          left1 = new JLabel("Left1");
          add(left1);
          left01 = new JTextField(0);
          add(left01);
          right1 = new JLabel("Right1");
          add(right1);
          right01 = new JTextField(0);
          add(right01);
          left2 = new JLabel("Left2");
          add(left2);
          left02 = new JTextField(0);
          add(left02);
          right2 = new JLabel("Right2");
          add(right2);
          right02 = new JTextField(0);
          add(right02);
          left3 = new JLabel("Left3");
          add(left3);
          left03 = new JTextField(0);
          add(left03);
          right3 = new JLabel("Right3");
          add(right3);
          right03 = new JTextField(0);
          add(right03);
class buttonPanel extends JPanel {     // 200 
     public buttonPanel(dataPanel xyz, JTextArea msgout) {     // 100
          GridLayout actionGrid = new GridLayout(1, 1, 5, 15); // row, col, hgap, vgap
          setLayout(actionGrid);     
          JButton buttonTest = new JButton("TestMe");
          int width = 5;
          int height = 30;
          buttonTest.setPreferredSize(new Dimension(width, height));
          buttonTest.addActionListener( new updateDataFields( xyz, msgout ));
          add(buttonTest);
     }     // 100
}     // 200
class NamePass extends JPanel {
    void buildConstraints(GridBagConstraints gbc, int gx, int gy,
        int gw, int gh, int wx, int wy) {
        gbc.gridx = gx;
        gbc.gridy = gy;
        gbc.gridwidth = gw;
        gbc.gridheight = gh;
        gbc.weightx = wx;
        gbc.weighty = wy;
    public NamePass() {
        GridBagLayout gridbag = new GridBagLayout();
        GridBagConstraints constraints = new GridBagConstraints();
        JPanel pane1 = new JPanel();
        pane1.setLayout(gridbag);
        // Name label
        buildConstraints(constraints, 0, 0, 1, 1, 10, 40);
        constraints.fill = GridBagConstraints.NONE;
        constraints.anchor = GridBagConstraints.EAST;
        JLabel label1 = new JLabel("Name:", JLabel.LEFT);
        gridbag.setConstraints(label1, constraints);
        pane1.add(label1);
        // Name text field
        buildConstraints(constraints, 1, 0, 1, 1, 90, 0);
        constraints.fill = GridBagConstraints.HORIZONTAL;
        JTextField tfname = new JTextField();
        gridbag.setConstraints(tfname, constraints);
        pane1.add(tfname);
        // password label
        buildConstraints(constraints, 0, 1, 1, 1, 0, 40);
        constraints.fill = GridBagConstraints.NONE;
        constraints.anchor = GridBagConstraints.EAST;
        JLabel label2 = new JLabel("Password:", JLabel.LEFT);
        gridbag.setConstraints(label2, constraints);
        pane1.add(label2);
        // password text field
        buildConstraints(constraints, 1, 1, 1, 1, 0, 0);
        constraints.fill = GridBagConstraints.HORIZONTAL;
        JPasswordField tfpass = new JPasswordField();
        tfpass.setEchoChar('*');
        gridbag.setConstraints(tfpass, constraints);
        pane1.add(tfpass);
        // OK Button
        buildConstraints(constraints, 0, 2, 2, 1, 0, 20);
        constraints.fill = GridBagConstraints.NONE;
        constraints.anchor = GridBagConstraints.CENTER;
        JButton okb = new JButton("OK");
        gridbag.setConstraints(okb, constraints);
        pane1.add(okb);
        // Content Pane
//        setContentPane(pane);
        setVisible(true);
}

Answer 1

The problem is in your NamePass panel...you create another panel object called pane1 and add everything to it. Just remove the line that creates the pane1 object and everywhere you have pane1.add(...) just remove "pane1." - you will then be adding to your NamePass panel instead!