package jtoolbar;import java.awt.*;import java.awt.event.*;import javax.swing.*;import javax.swing.border.*;public class Frame1 extends JFrame {  JPanel contentPane;  BorderLayout borderLayout1 = new BorderLayout();  JToolBar jToolBar1 = new JToolBar();  JButton jButton1 = new JButton();  JButton jButton2 = new JButton();  JButton jButton3 = new JButton();  JPanel jPanel1 = new JPanel();  Border border1;  JButton jButton4 = new JButton();  JCheckBox jCheckBox1 = new JCheckBox();  /**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();    border1 = BorderFactory.createBevelBorder(BevelBorder.LOWERED,Color.white,Color.white,new Color(134, 134, 134),new Color(93, 93, 93));    contentPane.setLayout(borderLayout1);    this.setSize(new Dimension(330, 271));    this.setTitle("JToolBar演示程序");    jButton1.setToolTipText(" 后退");    jButton1.setHorizontalTextPosition(SwingConstants.CENTER);    jButton1.setIcon(new ImageIcon(Frame1.class.getResource("images/Left.gif")));    jButton1.setText("后退");    jButton1.setVerticalTextPosition(SwingConstants.BOTTOM);    jButton2.setToolTipText("主頁");    jButton2.setHorizontalTextPosition(SwingConstants.CENTER);    jButton2.setIcon(new ImageIcon(Frame1.class.getResource("images/Home.gif")));    jButton2.setText("主頁");    jButton2.setVerticalTextPosition(SwingConstants.BOTTOM);    jButton3.setToolTipText("前進");    jButton3.setHorizontalTextPosition(SwingConstants.CENTER);    jButton3.setIcon(new ImageIcon(Frame1.class.getResource("images/Right.gif")));    jButton3.setText("前進");    jButton3.setVerticalTextPosition(SwingConstants.BOTTOM);    jPanel1.setBorder(border1);    jButton4.setToolTipText("幫助");    jButton4.setHorizontalTextPosition(SwingConstants.CENTER);    jButton4.setIcon(new ImageIcon(Frame1.class.getResource("images/Help.gif")));    jButton4.setText("幫助");    jButton4.setVerticalTextPosition(SwingConstants.BOTTOM);    jCheckBox1.setSelected(true);    jCheckBox1.setText("顯示文本");    jCheckBox1.addActionListener(new java.awt.event.ActionListener() {      public void actionPerformed(ActionEvent e) {        jCheckBox1_actionPerformed(e);      }    });    contentPane.add(jToolBar1, BorderLayout.NORTH);    jToolBar1.add(jButton1, null);    jToolBar1.add(jButton2, null);    jToolBar1.add(jButton3, null);    jToolBar1.add(jButton4, null);    jToolBar1.add(jCheckBox1, null);    contentPane.add(jPanel1,  BorderLayout.CENTER);  }  /**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 jCheckBox1_actionPerformed(ActionEvent e) {    Component c;    int i = 0;    try{      while((c = jToolBar1.getComponentAtIndex(i++)) != null) {        JButton button = (JButton)c;        if (jCheckBox1.isSelected())          button.setText(button.getToolTipText());        else          button.setText(null);      }    }catch(Exception e){}  }}