package simpleusers;import java.awt.*;import java.awt.event.*;import javax.swing.*;/** * <p>Title: </p> * <p>Description: </p> * <p>Copyright: Copyright (c) 2005</p> * <p>Company: </p> * @author not attributable * @version 1.0 */public class MainFrame extends JFrame {  JPanel contentPane;  JRadioButton jRadioButton1 = new JRadioButton();  JRadioButton jRadioButton2 = new JRadioButton();  JRadioButton jRadioButton3 = new JRadioButton();  JButton jButton1 = new JButton();  JButton jButton2 = new JButton();  ButtonGroup buttonGroup1 = new ButtonGroup();  //Construct the frame  public MainFrame() {    enableEvents(AWTEvent.WINDOW_EVENT_MASK);    try {      jbInit();    }    catch(Exception e) {      e.printStackTrace();    }  }  //Component initialization  private void jbInit() throws Exception  {    contentPane = (JPanel) this.getContentPane();    jRadioButton1.setFont(new java.awt.Font("Dialog", 0, 20));    jRadioButton1.setSelected(true);    jRadioButton1.setText("用戶登錄");    jRadioButton1.setBounds(new Rectangle(64, 36, 169, 25));    contentPane.setLayout(null);    this.setSize(new Dimension(231, 244));    this.setTitle("用戶管理系統");    jRadioButton2.setBounds(new Rectangle(63, 80, 169, 25));    jRadioButton2.setText("用戶注冊");    jRadioButton2.setFont(new java.awt.Font("Dialog", 0, 20));    jRadioButton3.setFont(new java.awt.Font("Dialog", 0, 20));    jRadioButton3.setToolTipText("");    jRadioButton3.setText("修改密碼");    jRadioButton3.setBounds(new Rectangle(63, 120, 169, 25));    jButton1.setBounds(new Rectangle(32, 164, 68, 33));    jButton1.setFont(new java.awt.Font("Dialog", 0, 16));    jButton1.setText("確定");    jButton1.addActionListener(new MainFrame_jButton1_actionAdapter(this));    jButton2.setText("退出");    jButton2.setFont(new java.awt.Font("Dialog", 0, 16));    jButton2.setBounds(new Rectangle(131, 163, 68, 33));    contentPane.add(jRadioButton1, null);    contentPane.add(jRadioButton2, null);    contentPane.add(jRadioButton3, null);    contentPane.add(jButton1, null);    contentPane.add(jButton2, null);    buttonGroup1.add(jRadioButton1);    buttonGroup1.add(jRadioButton2);    buttonGroup1.add(jRadioButton3);  }  //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 jButton1_actionPerformed(ActionEvent e) {    if (jRadioButton1.isSelected()){      LoginFrame lf=new LoginFrame();      lf.setSize(300,250);      this.dispose();      lf.show();    }  }}class MainFrame_jButton1_actionAdapter implements java.awt.event.ActionListener {  MainFrame adaptee;  MainFrame_jButton1_actionAdapter(MainFrame adaptee) {    this.adaptee = adaptee;  }  public void actionPerformed(ActionEvent e) {    adaptee.jButton1_actionPerformed(e);  }}