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POAdd ActionListener in JPanel
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copied!<p>I have a JPanel that has two Jbuttons. The purpose is that as soon as I push the first Jbutton ("Do you have predicted value ...."), another JPanel pop up and I can see other created Jbuttons. The problem is that when I run the code, I can see the first panel, but when I click on the button, nothing happens. It would be great if you can help me. </p> <pre><code>public class Main { private static Component frame; private static JFileChooser inputFile; private static JFileChooser outputFile; private static String fullpath; private static String fullpath1; private static String fullpath2; private static String fullpath3; public static void main(String args[]) throws FileNotFoundException, IOException { try { GridBagConstraints gbc = new GridBagConstraints(); gbc.insets = new Insets(5, 5, 5, 5); JButton nextPanel = new JButton("Do you have predicted values or residual errors?"); JButton inputButton = new JButton("Browse predictor dataset"); JPanel myPanel = new JPanel(new GridBagLayout()); //new panel gbc.gridwidth = 1; gbc.gridheight = 1; gbc.gridx = 0; gbc.gridy = 1; gbc.anchor = (0 == 0) ? GridBagConstraints.WEST : GridBagConstraints.EAST; gbc.fill = (0 == 0) ? GridBagConstraints.BOTH : GridBagConstraints.HORIZONTAL; gbc.weightx = (0 == 0) ? 0.1 : 0.1; gbc.weighty = 1.0; myPanel.add(nextPanel, gbc); final JPanel myPanel1 = new JPanel(new GridBagLayout()); myPanel.add(myPanel1); nextPanel.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){ GridBagConstraints gbc1 = new GridBagConstraints(); gbc1.insets = new Insets(5, 5, 5, 5); JButton errorButton = new JButton("Browse residual error associated to each instance"); JButton predictedButton = new JButton("Browse predicted value associated to each instance"); gbc1.gridwidth = 1; gbc1.gridheight = 1; gbc1.gridx = 0; gbc1.gridy = 1; gbc1.anchor = (0 == 0) ? GridBagConstraints.WEST : GridBagConstraints.EAST; gbc1.fill = (0 == 0) ? GridBagConstraints.BOTH : GridBagConstraints.HORIZONTAL; gbc1.weightx = (0 == 0) ? 0.1 : 0.1; gbc1.weighty = 1.0; myPanel1.add(errorButton, gbc1); } }); gbc.gridwidth = 1; gbc.gridheight = 1; gbc.gridx = 0; gbc.gridy = 9; gbc.anchor = (0 == 0) ? GridBagConstraints.WEST : GridBagConstraints.EAST; gbc.fill = (0 == 0) ? GridBagConstraints.BOTH : GridBagConstraints.HORIZONTAL; gbc.weightx = (0 == 0) ? 0.1 : 0.1; gbc.weighty = 1.0; myPanel.add(inputButton, gbc); inputButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { JFileChooser inputFile = new JFileChooser(); inputFile.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES); if (inputFile.showOpenDialog(null) == JFileChooser.APPROVE_OPTION) { File file1 = inputFile.getSelectedFile(); String fullpathTemp = (String) file1.getAbsolutePath(); fullpath = fullpathTemp; } } }); int result = JOptionPane.showConfirmDialog(null, myPanel, "CPM Program", JOptionPane.OK_CANCEL_OPTION); } catch (Exception e) { System.err.println("Error: " + e.getMessage()); } finally { } } } </code></pre>

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