import java.awt.Container;

import java.awt.GridLayout;

import java.awt.event.ItemEvent;

import java.awt.event.ItemListener;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import javax.swing.BorderFactory;

import javax.swing.ButtonGroup;

import javax.swing.JCheckBox;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.JRadioButton;

//=================================================

// File Name       :	JCheckBox_demo

//------------------------------------------------------------------------------

// Author          :	Common

// 类名：JCheckBox

// 属性：

// 方法：

class MyCheckBox implements ItemListener{

	private JFrame frame = new JFrame("窗体");

	private Container cont = frame.getContentPane();

	private JCheckBox jrb1  = new JCheckBox("单选1");

	private JCheckBox jrb2  = new JCheckBox("单选2");

	private JCheckBox jrb3  = new JCheckBox("单选3");

	private JPanel pan = new JPanel();

	public MyCheckBox(){

		//定义一个面板的边框显示条

		pan.setBorder(BorderFactory.createTitledBorder("请选择按钮"));

		pan.setLayout(new GridLayout(1,3));

		pan.add(this.jrb1);

		pan.add(this.jrb2);

		pan.add(this.jrb3);

		jrb1.addItemListener(this); 			//加入事件监听

		jrb2.addItemListener(this); 			//加入事件监听

		jrb3.addItemListener(this); 			//加入事件监听

		cont.add(pan);

		this.frame.setSize(330,80);

		this.frame.setVisible(true);

		this.frame.addWindowListener(new WindowAdapter(){

			public void windowClosing(WindowEvent e) {			//窗口关闭时触发，按下关闭按钮

			// TODO 自动生成的方法存根

			System.out.println("windowClosing-->窗口关闭");

			System.exit(1);

			}

		});

	}

	@Override

	public void itemStateChanged(ItemEvent e) {

		// TODO 自动生成的方法存根

		if(jrb1.isSelected()){

			System.out.println("jrb1");

		}

		if(jrb2.isSelected()){

			System.out.println("jrb2");

		}

		if(jrb3.isSelected()){

			System.out.println("jrb3");

		}

	}

}

//主类

//Function        : 	JCheckBox_demo

public class JCheckBox_demo {

	public static void main(String[] args) {

		// TODO 自动生成的方法存根

		new MyCheckBox();

	}

}