package ex10_01;import java.awt.*;import java.awt.event.*;import javax.swing.*;public class Frame1 extends JFrame {  JPanel contentPane;  JScrollPane jScrollPane1 = new JScrollPane();  JList jList1 = new JList();  /**Construct the frame*/  public Frame1() {    enableEvents(AWTEvent.WINDOW_EVENT_MASK);    try {      jbInit();    }    catch(Exception e) {      e.printStackTrace();    }  }  /**Component initialization*/  private void jbInit() throws Exception  {    //setIconImage(Toolkit.getDefaultToolkit().createImage(Frame1.class.getResource("[Your Icon]")));    contentPane = (JPanel) this.getContentPane();    contentPane.setLayout(null);    this.setSize(new Dimension(400, 300));    this.setTitle("Frame Title");    this.addWindowListener(new java.awt.event.WindowAdapter() {      public void windowOpened(WindowEvent e) {        this_windowOpened(e);      }    });    jScrollPane1.setBounds(new Rectangle(39, 37, 110, 112));    contentPane.add(jScrollPane1, null);    jScrollPane1.getViewport().add(jList1, null);  }  /**Overridden so we can exit when window is closed*/  protected void processWindowEvent(WindowEvent e) {    super.processWindowEvent(e);    if (e.getID() == WindowEvent.WINDOW_CLOSING) {      System.exit(0);    }  }  void this_windowOpened(WindowEvent e) {  //