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视频来自：优酷

在java中添加图片做动画效果，怎么一闪一闪的运动啊？怎样才能让它不闪的连续运动呢？

下面是代码，代码项目project里有两个类，一个是LoadImg，一个是Entry

图片放在src下的一个新建文件夹image里，调试的时候自己可以随便找个图片，在src下新建一个文件夹命名image，然后把图片房里去就行。

第一个Entry类

package project;

import java.awt.Canvas;

import java.awt.Graphics;

import java.awt.Image;

import java.awt.Toolkit;

import java.awt.event.ComponentAdapter;

import java.awt.event.ComponentEvent;

import java.awt.event.ContainerAdapter;

import java.awt.event.ContainerEvent;

import javax.swing.JFrame;

import javax.swing.JPanel;

import org.omg.CORBA.PUBLIC_MEMBER;

public class Entry extends Canvas{

Image img = LoadImg.getImage("image/ball.png");

// "image/ball.png"图片放在src下的一个新建文件夹image里

private double degree = Math.PI/4;

private double x = 20,y = 70;

Entry() {

new MyThread().start();

}

public void paint(Graphics g){

g.drawImage(img, (int)x, (int)y, null);

x += 10*Math.cos(degree);

y += 10*Math.sin(degree);

if(x>=660 || x<=0)

degree = Math.PI - degree;

if(y>=440 || y<0)

degree = -degree;

}

class MyThread extends Thread{

public void run() {

while(true){

repaint();

try {

Thread.sleep(40);

} catch (InterruptedException e) {

}

}

}

}

public static void main(String[] args) {

JFrame frame = new JFrame();

frame.setSize(800, 600);

frame.setLocation(100, 50);

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setVisible(true);

Entry canvas = new Entry();

canvas.setSize(frame.getWidth(), frame.getHeight());

frame.add(canvas);

}

}

第二个LoadImg类

package project;

import java.awt.Image;

import java.awt.image.BufferedImage;

import java.io.IOException;

import java.net.URL;

import javax.imageio.ImageIO;

public class LoadImg {

private LoadImg(){}

public static Image getImage(String path){

URL u = Entry.class.getClassLoader().getResource(path);

Image img = null;

try {

img = ImageIO.read(u);

} catch (IOException e) {

e.printStackTrace();

}

return img;

}

}