实现鼠标画图的Java程序

用鼠标画图有很多乐趣和便利之处，那么如何才能实现鼠标画图呢?下面本站小编为大家整理了关于实现鼠标画图的Java程序，希望对你有所帮助。

import java.awt.Color;

import java.awt.Frame;

import java.awt.Graphics;

import java.awt.Point;

import java.awt.event.MouseAdapter;

import java.awt.event.MouseEvent;

import java.awt.event.MouseListener;

import java.util.ArrayList;

import java.util.Iterator;

public class MyMouseAdapter {

public static void main(String[] args) {

new MyFrame5(“drawing”);

class MyFrame5 extends Frame{

ArrayList points=null;

MyFrame5(String s){

super(s);

points=new ArrayList();

setLayout(null);

setBounds(300，300，400，300);

this.setBackground(new Color(204，204，255));

setVisible(true);

this.addMouseListener(new Monitor5());

}

public void paint(Graphics g){

Iterator i=points.iterator();

while(i.hasNext()){

Point p=(Point)i.next();

g.setColor(Color.blue);

g.fillOval(p.x，p.y， 10， 10);

}

}

public void addPoint(Point p){

points.add(p);

}

}

class Monitor5 extends MouseAdapter{ //MouseAdapter实现了MouseListener接口

public void mousePressed(MouseEvent e){

MyFrame5 f=(MyFrame5)e.getSource();

f.addPoint(new Point(e.getX()，e.getY()));

f.repaint(); //让Frame强制经行重画

}

}