example program on java Generic GUI program (xgui)

The following kcomplete GUI program can be inserted immediately after the header comments and optional package declaration. It is a very simple subclass of JFrame. You will have to add a lot to it, but this gives you a good starting point to prevent "blank screen" anxiety.

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import java.awt.*; import java.awt.event.*; import javax.swing.*; ///////////////////////////////////////////////////////////////////// ${Identifier} public class ${Identifier} extends JFrame { //================================================================ constants private static final String PROMPT = "Do you really want to quit?"; //=================================================================== fields //... GUI components referenced by listeners, model refs, .... //============================================================== constructor public ${Identifier}() { //... Build components. JButton quitButton = new JButton("Quit"); //... Add Listeners quitButton.addActionListener(new QuitAction()); //... Create content pane, set layout and border. JPanel content = new JPanel(); content.setLayout(new BorderLayout(5, 5)); content.setBorder(BorderFactory.createEmptyBorder(12,12,12,12)); content.add(quitButton); //... Set window attributes. super.setContentPane(content); super.pack(); // Layout components. super.setTitle("${Identifier}"); super.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); super.setLocationRelativeTo(null); // Center window. } /////////////////////////////////////////// innner listener class QuitAction class QuitAction implements ActionListener { public void actionPerformed(ActionEvent e) { int confirm = JOptionPane.showConfirmDialog(${Identifier}.this, PROMPT); if (confirm == JOptionPane.OK_OPTION) { System.exit(0); } } } //===================================================================== main public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { public void run() { ${Identifier} window = new ${Identifier}(); window.setVisible(true); } }); } }