shiyan7b_1.java

java例子

import java.awt.*;
import java.awt.event.*;
public class Shiyan7B_1 
{
	
	public static void main(String args[])
	{
		myMenuFrame myMenu=new myMenuFrame();
        myMenu.setVisible(true);
	}
	
}

class myMenuFrame extends Frame implements ActionListener,ItemListener
{
	TextField text;
	PopupMenu popM;
	Button but;
	FileDialog filedia;
 
	public myMenuFrame()
	{
		super("我的菜单窗口");
		setLayout(new BorderLayout());
		setSize(300,200);
		but=new Button("弹出菜单按键");
		add("North",but);
		this.add(but);
		but.addActionListener(this);
		MenuBar myB=new MenuBar();
		setMenuBar(myB);
		Menu m1=new Menu("文件");
MenuItem m11=new MenuItem("打开");
m11.addActionListener(this);
MenuItem m12=new MenuItem("保存");
MenuShortcut sc1=new MenuShortcut(KeyEvent.VK_O);
MenuShortcut sc2=new MenuShortcut(KeyEvent.VK_E);
m11.setShortcut(sc1);
m12.setShortcut(sc2);
m1.add(m11);
m1.add(m12);
m1.addSeparator();
MenuItem m13=new MenuItem("退出",new MenuShortcut(KeyEvent.VK_X));
m1.add(m13);
m1.addActionListener(this);
myB.add(m1);
popM=new PopupMenu();
MenuItem p1=new MenuItem("复制");
p1.addActionListener(this);
popM.add(p1);
MenuItem p2=new MenuItem("剪切");
p2.addActionListener(this);
popM.add(p2);
MenuItem p3=new MenuItem("粘贴");
p3.addActionListener(this);
popM.add(p3);
but.add(popM);
text=new TextField();
add("South",text);
filedia=new FileDialog(this,"打开对话框",FileDialog.LOAD);
filedia.setVisible(false);
filedia.addWindowListener(new WindowAdapter()
		{public void windowClosing(WindowEvent e)
			{filedia.setVisible(false);
}
});
addWindowListener(new WindowAdapter()
		{public void windowClosing(WindowEvent e)
			{setVisible(false);System.exit(0);
}
});

	}
	public void itemStateChanged(ItemEvent e)
	{
		text.setText("状态改变");
	}
	public void actionPerformed(ActionEvent e)
	{
		String s;
		text.setText(e.getActionCommand());
		if(e.getActionCommand()=="弹出菜单按键")
			popM.show(but,50,70);
		if(e.getActionCommand()=="退出")
			System.exit(0);
		if(e.getActionCommand()=="打开")
		{filedia.setVisible(true);
		s=filedia.getFile();
        text.setText(s);}

	}
	
}