homework12_4.java

本例主要实现了显示鼠标的位置的功能

import java.awt.*;
import java.awt.event.*;

import javax.swing.*;

public class homework12_4 extends JPanel implements MouseMotionListener,MouseListener
{

	private int x,y;

	public homework12_4()
	{
		x=0;
		y=0;
		this.addMouseListener(this);
		this.addMouseMotionListener(this);
	}
	public void setXY(int x,int y)
	{
		this.x=x;
		this.y=y;
		repaint();
	}
	protected void paintComponent(Graphics g)
	{
		super.paintComponent(g);
		g.drawString("("+x+","+y+")",x,y);
	}
	

	
	public void mouseClicked(MouseEvent e){
		//this.setXY(e.getX(),e.getY());	
		}
	public void mouseEntered(MouseEvent e){
		//this.setXY(e.getX(),e.getY());	
		}
	public void mouseReleased(MouseEvent e){
		//this.setXY(e.getX(),e.getY());	
		}
	public void mousePressed(MouseEvent e){
		//this.setXY(e.getX(),e.getY());		
	}
	public void mouseDragged(MouseEvent e){
		this.setXY(e.getX(),e.getY());		}
	public void mouseMoved(MouseEvent e){
		this.setXY(e.getX(),e.getY());	
	}
	public void mouseExited(MouseEvent e){
		//this.setXY(e.getX(),e.getY());		
	}
	public static void main(String []args)
	{
		JFrame frame=new JFrame("显示鼠标位置");
		frame.getContentPane().add(new homework12_4());
		frame.setSize(500,500);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setVisible(true);
		
	}	

}