mousetest.java

当鼠标移动到指定的区域时

import javax.swing.*;
import javax.swing.border.Border;
import java.awt.*;
import java.awt.event.*;


public class MouseTest extends JFrame{
	JTextArea textArea1;
	IconPic panel1;
	public MouseTest(String str){
		super(str);
		textArea1=new JTextArea(10,30); 
		panel1=new IconPic();
		JScrollPane scPanel1=new JScrollPane(textArea1);
		Container container = getContentPane();
		container.setLayout(new GridLayout(2,1,0,10));
		container.add(panel1);
		container.add(scPanel1);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
		
	}

	public static void main(String args[]){
		final MouseTest a1=new MouseTest("Hello World");
		a1.setVisible(true);
		a1.pack();
		
		a1.panel1.addMouseListener(new MouseAdapter(){
			public void mouseEntered(MouseEvent e){
			a1.textArea1.append("Mouse Entered!"+"\n");
		}
			public void mouseExited(MouseEvent e){
				a1.textArea1.append("Mouse Exit!"+"\n");
			}
			public void mousePressed(MouseEvent e){
				a1.textArea1.append("Mouse Pressed!"+"\n");
			}
			public void mouseClicked(MouseEvent e){
				a1.textArea1.append("Mouse Clicked!"+"\n");
			}
			public void mouseReleased(MouseEvent e){
				a1.textArea1.append("Mouse Draged"+"\n");
			}
		});
		
		/*a1.panel1.addMouseMotionListener(new MouseMotionAdapter(){
			public void mouseDragged(MouseEvent e){
			a1.textArea1.append("Mouse Dragged!"+"\n");
		}
		});*/

	}
}

class IconPic extends JPanel{
	Toolkit kit=Toolkit.getDefaultToolkit();
	Image dog=kit.getImage("D:/homework/JAVA/T1.gif");
	int iconX;
	int iconY;
	public IconPic(){
		addMouseMotionListener(new MouseMotionAdapter(){
		public void mouseDragged(MouseEvent e){
			updateIcon(e);
			
			}
				
	});
	
	addMouseListener(new MouseAdapter(){
		public void mouseReleased(MouseEvent e){
			iconX=e.getX();
			iconY=e.getY();
			repaint();
		}
	});
	}	
	public void updateIcon(MouseEvent e){
		iconX=e.getX();
		iconY=e.getY();
		repaint();
	}
	public void paint(Graphics g) {
		//Graphics gra=new Graphics();
		super.paintComponent(g);
		g.drawImage(dog,iconX, iconY,this);
	}

}