Java实现简单的鼠标划线

Java实现简单的鼠标划线

import javax.swing.JFrame;
import javax.swing.JPanel;
import java.awt.Graphics;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.awt.event.MouseEvent;
import java.awt.Graphics;
import java.lang.Math;
import java.awt.*;
public class test1 extends JPanel implements MouseListener, MouseMotionListener {
    
	static test1 nPanel;
	public static void main(String args[]){
	
		JFrame nFrame=new JFrame("Drawing program");
		 nPanel=new test1();
		 nFrame.add(nPanel);
		 nFrame.setBounds(100,100,800,800);
		 nFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		 nFrame.setVisible(true);
		 nPanel.addMouseListener(nPanel);
	
	}
	
	
	public  void mousePressed(MouseEvent e) {
		int x=e.getX();
		int y=e.getY();
		Graphics g=getGraphics();
		g.drawLine(0,0,x,y);
		
	}
	
	public void mouseMoved(MouseEvent e) {
   
  	}
  	public void mouseDragged(MouseEvent e) {
      
  	}
	 
	public void mouseReleased(MouseEvent e) {
	   
	}
	 
	public void mouseEntered(MouseEvent e) {
		
	}
	 
	public void mouseExited(MouseEvent e) {
		
	}
	 
	public void mouseClicked(MouseEvent e) {
		
		
	}
}