import javax.swing.*; import java.awt.*; import java.awt.event.*; public class StandardJFrame extends JFrame implements WindowListener { MainJPanel myContentPane; public StandardJFrame() { setVisible(false); setSize(400, 500); setTitle("StandardJFrame"); setLocationRelativeTo(null); setResizable(false); // setAlwaysOnTop(true); myContentPane = new MainJPanel(); setContentPane(myContentPane); addWindowListener(this); } public void windowClosing(WindowEvent we) { } public void windowActivated(WindowEvent we) { } public void windowClosed(WindowEvent we) { } public void windowDeactivated(WindowEvent we) { } public void windowDeiconified(WindowEvent we) { } public void windowIconified(WindowEvent we) { } public void windowOpened(WindowEvent we) { } }