protected void SearchButtonClicked(){

　　System.out.println("Search Button Clicked");

　　SearchText.requestFocus();

　　SearchText.selectAll();

　　} // 处理SearchButton按钮事件子程序

　　class ButtonAction implements java.awt.event.ActionListener {

　　public void actionPerformed(java.awt.event.ActionEvent event) {

　　Object object = event.getSource();

　　if (object == ClearButton)

　　ClearButtonClicked();

　　else if(object == SearchButton)

　　SearchButtonClicked();

　　} // end public void actionPerformed(...

　　} //监听事件的发生，如按钮的按下，鼠标的按动等，转向相应的处理。...

　　public void setGUI(){

　　TopPanel=new com.sun.java.swing.JPanel(); //TopPanel面板

　　java.awt.GridBagLayout TopLayout = new java.awt.GridBagLayout();

　　TopPanel.setLayout(TopLayout);

　　ClearButton = new com.sun.java.swing.JButton("Clear"); //ClearButton按钮

　　SearchText = new com.sun.java.swing.JTextField("Enter text here."); //SearchText文本框

　　SearchButton = new JButton("Search"); //SearchButton按钮

　　TopPanel.add(SearchText);//在TopPanel上安装SearchText文本框

　　TopPanel.add(SearchButton); ///在TopPanel上安装SearchButton按钮

　　TopPanel.add(ClearButton);// 在TopPanel上安装ClearButton按钮

　　MainPanel = new com.sun.java.swing.JPanel();//主面板MainPanel

　　java.awt.GridBagLayout MainLayout = new java.awt.GridBagLayout();

　　MainPanel.setLayout(MainLayout);

　　java.awt.GridBagConstraints MainConstraints = new java.awt.GridBagConstraints();