import java.awt.BorderLayout; 
 import java.awt.Container; 
 import java.awt.Point; 
 import java.awt.event.ActionEvent; 
 import java.awt.event.ActionListener; 
 import java.awt.event.MouseEvent; 
 import java.awt.event.MouseListener; 
  
 import javax.swing.JButton; 
 import javax.swing.JFrame; 
 import javax.swing.JList; 
 import javax.swing.JOptionPane; 
  
 public class MyDemo1 extends JFrame implements MouseListener,ActionListener{ 
 	@Override 
 	public void actionPerformed(ActionEvent e) { 
 		// TODO Auto-generated method stub 
 		if(e.getSource()==btn){ 
 			Object selectedObject=list.getSelectedValue(); 
 			if(selectedObject!=null){ 
 				JOptionPane.showMessageDialog(null,"选择项目"+selectedObject ); 
 				System.out.println("选择项目"+selectedObject); 
 			}else{ 
 				JOptionPane.showMessageDialog(null,"没选择任何项目" ); 
 				System.out.println("没选择任何项目"); 
 			} 
 			 
 		} 
 	} 
  
 	@Override 
 	public void mouseClicked(MouseEvent e) { 
 		// TODO Auto-generated method stub 
 		System.out.println("mouseClicked"); 
 		Point p=e.getPoint(); 
 		if(list.contains(p)){//判断是否在JList的区域范围内 
 			System.out.println("合法范围"); 
 		}else{ 
 			System.out.println("无效范围"); 
 			list.clearSelection();//不在区域范围内取消选择 
 		} 
 	} 
  
 	@Override 
 	public void mousePressed(MouseEvent e) { 
 		// TODO Auto-generated method stub 
 		System.out.println("mousePressed"); 
 	} 
  
 	@Override 
 	public void mouseReleased(MouseEvent e) { 
 		// TODO Auto-generated method stub 
 		 
 	} 
  
 	@Override 
 	public void mouseEntered(MouseEvent e) { 
 		// TODO Auto-generated method stub 
 		 
 	} 
  
 	@Override 
 	public void mouseExited(MouseEvent e) { 
 		// TODO Auto-generated method stub 
 		 
 	} 
  
 	private String[] names={"A","B","C"}; 
 	private JList list=null; 
 	private JButton btn=null; 
 	private Container container=null; 
 	 
 	public MyDemo1(String title){ 
 		super(title); 
 		btn=new JButton("查看"); 
 		list=new JList(names); 
 		container=this.getContentPane(); 
 		container.setLayout(new BorderLayout()); 
 		container.add(list,BorderLayout.WEST); 
 		container.add(btn,BorderLayout.EAST); 
 		 
 //		list. 
 		btn.addActionListener(this); 
 		this.addMouseListener(this); 
 		this.pack(); 
 		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
 		this.setLocationRelativeTo(null); 
 		this.setVisible(true); 
 	} 
 	 
 	public static void main(String[] args){ 
 		new MyDemo1("demo"); 
 	} 
 }