import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
public class Help extends JFrame{
  private JMenuBar menubar;
  private JMenu option;
  private JMenuItem exit;
  Container contentPane;
  JSplitPane sp;

  public Help(String s){
    super(s);
    init();
  }
  private void init(){
    sp=new JSplitPane();
    sp.setContinuousLayout(true);
    sp.setDividerSize(10);
    sp.setDividerLocation(165);
 
    contentPane=getContentPane();
    menubar=new JMenuBar();
    option=new JMenu("Option");
    menubar.add(option);
    exit=new JMenuItem("Exit");
    /*exit.addActionListener(new ActionListener(){
      public void actionPerformed(ActionEvent e){
        dispose();
      }
    });*/
    /* 上面代碼在實際運行中為何出現(xiàn)意外現(xiàn)象?*/
    option.add(exit); 
    contentPane.add(sp,BorderLayout.CENTER); 
    setJMenuBar(menubar);
  }
}