ch9_53.java

来自「java图形用户界面设计 包括如何创建窗体 设计界面 管理布局 绘制图形 」· Java 代码 · 共 56 行

import javax.swing.*;
import java.awt.event.*;
public class ch9_53 extends JFrame
{
	public ch9_53()
	{
		super("菜单演示");
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setBounds(20,20,500,300);
		
	}
	public static void main(String [] args)
	{
		ch9_53 f=new ch9_53();
		
		JMenuBar mbar=new JMenuBar();
		JMenu mfile=f.buildFileMenu();
		mbar.add(mfile);
		mbar.setOpaque(true);

		f.setJMenuBar(mbar);
		
		
		f.setVisible(true);
	}
	public JMenu buildFileMenu()
	{
		JMenu theedit=new JMenu("文件");
		theedit.setIcon(new ImageIcon("cut.gif"));
		
		JRadioButtonMenuItem newf=new JRadioButtonMenuItem("新建(N)",new ImageIcon("new.gif"),false);
		JRadioButtonMenuItem open=new JRadioButtonMenuItem("打开(O)",new ImageIcon("close.gif"),false);
	
		//添加事件处理
		newf.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent e)
			{
				System.out.print("fasdf");
			}
			
		});		
		
		//两个中只能选择一个
		ButtonGroup bg=new ButtonGroup();
		bg.add(newf);
		bg.add(open);
		
		theedit.add(newf);
		theedit.add(open);
		

		
		return theedit;
	}
}