java的applet小程序在鼠标点击处画圆

来源：百度知道 编辑：UC知道 时间：2024/05/14 16:44:08
java的applet小程序在鼠标点击处画圆，怎么能让每次画的圆都保留啊
下面是我的程序，应该怎么改，请指教！多谢了！
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
public class DrawOval extends Applet implements

MouseListener,MouseMotionListener{
int x,y;
public void init(){
this.addMouseListener(this);
this.addMouseMotionListener(this);
}
public void paint(Graphics g){
float a,b,c;
a=(float)Math.random();
b=(float)Math.random();
c=(float)Math.random();
g.setColor(new Color(a,b,c));
g.fillOval(x,y,10,10);
}
public void mouseClicked(MouseEvent e){
}
public void mouseEntered(MouseEvent e){
}
public void mouseExited(MouseEvent e){
}
public void mousePressed(MouseEvent e){
}
public void mouseReleased(MouseEvent e){
}
public void mouseDragged(MouseEvent e){
x=e.getX();
y=e.getY();
repaint()

import java.awt.*;
import java.awt.event.*;
import java.applet.*;
public class DrawOval extends Applet implements

MouseListener,MouseMotionListener{
int x,y;
public void init(){
this.addMouseListener(this);
this.addMouseMotionListener(this);
}
public void paint(Graphics g){
float a,b,c;
a=(float)Math.random();
b=(float)Math.random();
c=(float)Math.random();
g.setColor(new Color(a,b,c));
g.fillOval(x,y,10,10);
}
public void mouseClicked(MouseEvent e){
}
public void mouseEntered(MouseEvent e){
}
public void mouseExited(MouseEvent e){
}
public void mousePressed(MouseEvent e){
}
public void mouseReleased(MouseEvent e){
}
public void mouseDragged(MouseEvent e){
x=e.getX();
y=e.getY();
paint(); //这里不要那个了，你试试看。。
}
public void mouseMoved(MouseEvent e){
}
}