mymenu.java

这是一个小型的菜单的编程的原代码

package Demo;
import java.awt.*;
import java.awt.event.*;

class Demo 
{
	Frame f=new Frame("demo");
	public static void main(String args[])
	{
		Demo Demo=new Demo();
		Demo.init();
	}
	public void init()
	{
		String s[][]={{"程序","计算器","信息录入","退出"},{"帮助","帮助主题","关于"}};
		MyMenu myMenu=new MyMenu(f,s);
		myMenu.showMenu();
		f.setSize(500,400);
		f.setBackground(Color.lightGray);
		f.setLocation(100,80);
		f.addWindowListener(new WindowEventProcess());
		f.show();
	}


}

/**
 *生成下拉式菜单
 */
public class MyMenu
{
	Frame f;
	String s[][];
	Menu menu[];
	MenuItem item[][];
	public MyMenu(Frame f,String s[][])
	{
		this.f=f;
		this.s=s;
		menu=new Menu[s.length];
		item=new MenuItem[s.length][];
				
	}
	public void showMenu()
	{
		MenuBar mb=new MenuBar();
		f.setMenuBar(mb);
		for(int i=0;i<s.length;i++)
		{
			menu[i]=new Menu(s[i][0]);
			mb.add(menu[i]);			
			for(int j=0;j<s[i].length-1;j++)
			{
				item[i]=new MenuItem[s[i].length-1];
				item[i][j]=new MenuItem(s[i][j+1]);
				menu[i].add(item[i][j]);
				item[i][j].addActionListener(new ProcessEvent(f));
			}		
		}
		menu[0].insertSeparator(menu[0].getItemCount()-1);			
	}
}
 
class WindowEventProcess extends WindowAdapter
{
	public void windowClosing(WindowEvent e)
	{
	
		System.exit(0);
	}	
}
/**
 *菜单事件处理
 */
class ProcessEvent extends WindowAdapter implements ActionListener
{
    Frame f;

	public ProcessEvent(Frame f)
	{
		this.f=f;		
	}
	
	public ProcessEvent()
	{
		
	}
	
	/**
	 *关闭对话框
	 **/
	public void windowClosing(WindowEvent e)
	{
		((Dialog)e.getSource()).dispose();
	}
    
   
	public void actionPerformed(ActionEvent e) 
	{
		if(e.getActionCommand().equals("退出"))
		{
			System.exit(0);
		}
		/*自己实现菜单事件处理
		if(e.getActionCommand().equals("计算器"))
		{
			new Calc(f).showCalc();
		}
		if(e.getActionCommand().equals("信息录入"))
		{
			new InputStu(f).showInputStu();
		}
		if(e.getActionCommand().equals("关于"))
		{
			new About(f).showAbout();
		}
		*/

		
	}	
}