java窗口多球运动代码 java窗口多球运动代码怎么写

用JAVA实现多线程编写,使得许多小球在界面内循环跳动

下面这段代码应该符合你的需求

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import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

public class BounceThread

{ public static void main(String[] args)

{ JFrame frame = new BounceThreadFrame();

frame.show();

}

}

class BounceThreadFrame extends JFrame

{ public BounceThreadFrame()

{ setSize(300, 200);

setTitle("Bounce");

addWindowListener(new WindowAdapter()

{ public void windowClosing(WindowEvent e)

{ System.exit(0);

}

} );

Container contentPane = getContentPane();

canvas = new JPanel();

contentPane.add(canvas, "Center");

JPanel p = new JPanel();

addButton(p, "Start",

new ActionListener()

{ public void actionPerformed(ActionEvent evt)

{ Ball b = new Ball(canvas);

b.start();

}

});

addButton(p, "Close",

new ActionListener()

{ public void actionPerformed(ActionEvent evt)

{ canvas.setVisible(false);

System.exit(0);

}

});

contentPane.add(p, "South");

}

public void addButton(Container c, String title,

ActionListener a)

{ JButton b = new JButton(title);

c.add(b);

b.addActionListener(a);

}

private JPanel canvas;

}

class Ball extends Thread

{ public Ball(JPanel b) { box = b; }

public void draw()

{ Graphics g = box.getGraphics();

g.fillOval(x, y, XSIZE, YSIZE);

g.dispose();

}

public void move()

{ if (!box.isVisible()) return;

Graphics g = box.getGraphics();

g.setXORMode(box.getBackground());

g.fillOval(x, y, XSIZE, YSIZE);

x += dx;

y += dy;

Dimension d = box.getSize();

if (x 0)

{ x = 0; dx = -dx; }

if (x + XSIZE = d.width)

{ x = d.width - XSIZE; dx = -dx; }

if (y 0)

{ y = 0; dy = -dy; }

if (y + YSIZE = d.height)

{ y = d.height - YSIZE; dy = -dy; }

g.fillOval(x, y, XSIZE, YSIZE);

g.dispose();

}

public void run()

{ try

{ draw();

for (int i = 1; i = 1000; i++)

{ move();

sleep(5);

}

}

catch(InterruptedException e) {}

}

private JPanel box;

private static final int XSIZE = 10;

private static final int YSIZE = 10;

private int x = 0;

private int y = 0;

private int dx = 2;

private int dy = 2;

}

JAVA做一个作业，制作一个window框里面有三个小球碰撞，碰到边框或者小球变色加反弹，错误代码求指点

没轮差配办法了 只能注庆简册腊指一个马甲了

import java.awt.*;

import java.awt.event.*;

import java.awt.Graphics;

public class yes {

public static void main(String args[])

{

Mywindow win=new Mywindow();

Ball qiu1=new Ball(5,5);

Thread thread1=new Thread(qiu1);

Ball qiu2=new Ball(10,5);

Thread thread2=new Thread(qiu2);

Ball qiu3=new Ball(15,5);

Thread thread3=new Thread(qiu3);

thread1.start();

thread2.start();

thread3.start();

}

}

class Mywindow extends Frame {

Mywindow (){

setSize(350,350);

setVisible(true);

setBackground(Color.BLACK);

validate();

addWindowListener(new WindowAdapter(){

public void windowClosing(WindowEvent e){

System.exit(0);

}

});

}

}

class Ball extends Mywindow implements Runnable

{

int rgb=0;

Color color;

int x,y;

int dx=5,dy=5;

Ball(int x,int y){

this.x=x;

this.y=y;

}

public void doColor(){

rgb=(int)(Math.random()*0xFFFFFF);

color=new Color(rgb);

}

public void paint(Graphics g){

g.setColor(color);

g.fillOval(x,y,50,50);

}

public void run(){

while(true){

if(x=0) {dx=5;doColor();}

else if((x+50)=getWidth()) {dx=-5; doColor();}

if(y=0) {dy=5;doColor();}

else if((y+50)=getHeight()) {dy=-5; doColor();}

x=x+dx;

y=y+dy;

repaint();

try{Thread.sleep(50);}

catch(InterruptedException e) {;}

}

}

}

java小球碰撞窗体边缘来回反弹的代码

import java.awt.Color;

import java.awt.Graphics;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import java.util.Random;

import javax.swing.JFrame;

import javax.swing.JPanel;

public class RunningBallDemo extends JFrame {

public static void main(String args[]) {

new 悉毁森RunningBallDemo();

}

public RunningBallDemo() {

Ball ballPanel = new Ball(5, 5);

getContentPane().add(ballPanel);

setBackground(Color.BLACK);

addWindowListener(new WindowAdapter() {

public void windowClosing(WindowEvent e) {

System.exit(0);

}

});

setSize(350, 350);

setVisible(true);

Thread thread1 = new Thread(ballPanel);

thread1.start();

}

}

class Ball extends JPanel implements Runnable {

int rgb = 0;

Color color;

int x, y;

int dx = 5, dy = 5;

Ball(int x, int y) {

this.x 余液= x;

this.y = y;

}

@Override

protected void paintComponent(Graphics g) {

super.paintComponent(g);

setBackground(Color.BLACK);

g.setColor(color);

g.fillOval(x, y, 50, 50);

}

public void run() {

while (true) {

if (x = 0) {

dx = 5;

updateBallColor();

} else if ((x + 50) = getWidth()) {

dx = -5;

updateBallColor();

}

if (y = 睁亩0) {

dy = 5;

updateBallColor();

} else if ((y + 50) = getHeight()) {

dy = -5;

updateBallColor();

}

x = x + dx;

y = y + dy;

repaint();

try {

Thread.sleep(25);

} catch (InterruptedException e) {

;

}

}

}

public void updateBallColor() {

rgb = new Random().nextInt();

color = new Color(rgb);

}

}

JAVA实现，在屏幕内一个小球随机移动

import javax.microedition.lcdui.Display;

import javax.microedition.midlet.MIDlet;

import javax.microedition.midlet.MIDletStateChangeException;import com.sun.midp.lcdui.DisplayDeviceAccess;

public class Main extends MIDlet {

public static Display display;

public static GameCanvas Game;

public static MIDlet mid;

public Main() {

Game=new GameCanvas();

display=Display.getDisplay(this);

mid=this;

}

protected void destroyApp(boolean arg0) throws MIDletStateChangeException {}

protected void pauseApp() {}

protected void startApp() throws MIDletStateChangeException {display.setCurrent(Game);}

}

Canvas类=========================import java.util.Random;import javax.microedition.lcdui.Canvas;

import javax.microedition.lcdui.Graphics;

public class GameCanvas extends Canvas implements Runnable{

private int BallX=0;

private int BallY=0;

private int BallW=20;

private int BallH=20;

private boolean BallRun=true;

private byte BallDir=0;

private final byte Left=1;

private final byte Right=2;

private final int ScreenWith=150;

private final int ScreenHight=200;

private final int Speed = 5;

Random rand;

public GameCanvas(){

rand=new Random();

int state=rand.nextInt()%2;

BallDir=(byte)(state==0?Left:Right);

BallX=rand.nextInt()%240;

BallY=rand.nextInt()%320;

new Thread(this).start();

this.setFullScreenMode(true);

}

protected void paint(Graphics g) {

g.setColor(0);

g.fillRect(0, 0,this.getWidth(), this.getHeight());

g.setColor(255, 255,255);

g.fillArc(BallX, BallY,BallW, BallH, 0,360);

} public void BallRun(){

switch(BallDir){

case Left:

if(BallX0){BallX-=Speed;}

else{BallDir=Right;};break;

case Right:

if(BallXScreenWith){BallX+=Speed;}

else{BallDir=Left;}break;

}

if(BallY=0BallRun){

BallY-=Speed;

}else{BallRun=false;}

if(BallY=ScreenHight!BallRun){

BallY+=Speed;

}else{BallRun=true;}

}

public void run() {

while(true){

BallRun();

this.repaint();

try{Thread.sleep(100);br }catch(Exception ex){ex.printStackTrace();}

} }}