纯Java代码实现流星划过天空

废话不多说了，直接给大家贴java代码了。

import java.awt.Color;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class MeteorFly extends JFrame {
final int MAX = ; // (~)流星的个数
final int SLEEP = ; // 流星飞行的速度（数值越大，速度越慢）
final int COLORLV = ; // (~)色阶（可改变光晕大小）
final String COLOR = null; // ("#"~"#ffffff")光晕颜色（如果不填或null，则为默认颜色）
final int SIZE = ; // (~)流星大小
private MyPanel panel;
public MeteorFly() {
panel = new MyPanel();
this.getContentPane().add(panel);
this.setSize(, ); // 创建窗体
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setVisible(true);
}
public static void main(String[] args) {
new MeteorFly();
}
class MyPanel extends JPanel implements Runnable {
Meteor p[];
int AppletWidth, AppletHeight;
BufferedImage OffScreen;
Graphics drawOffScreen;
Thread pThread;
public MyPanel() {
setBackground(Color.black); //窗体初始化
AppletWidth = ;
AppletHeight = ;
p = new Meteor[MAX];
for (int i = ; i < MAX; i++)
p[i] = new Meteor();
OffScreen = new BufferedImage(AppletWidth, AppletHeight,
BufferedImage.TYPE_INT_BGR);
drawOffScreen = OffScreen.getGraphics();
pThread = new Thread(this);
pThread.start();
}
@Override
public void paintComponent(Graphics g) {
// TODO Auto-generated method stub
super.paintComponents(g);
g.drawImage(OffScreen, , , this);
}
@Override
final public void run() {
while (true) {
// drawOffScreen.clearRect(, , AppletWidth, AppletHeight); //
// 清屏
for (int i = ; i < MAX; i++) {
drawOffScreen.setColor(p[i].color); // RGB颜色
drawOffScreen.fillOval(p[i].x, p[i].y, SIZE, SIZE);
p[i].x += p[i].mx;
p[i].y += p[i].my;
// if (p[i].x > AppletWidth || p[i].y > AppletHeight) {
// p[i].reset();
// }
int x = p[i].x;
int y = p[i].y;
int R = p[i].color.getRed(); // 提取颜色
int G = p[i].color.getGreen();
int B = p[i].color.getBlue();
while (true) {
if (R == && G == && B == ) {
break;
}
R -= COLORLV; // 尾部颜色淡化
if (R < ) {
R = ;
}
G -= COLORLV;
if (G < ) {
G = ;
}
B -= COLORLV;
if (B < ) {
B = ;
}
Color color = new Color(R, G, B);
x -= p[i].mx; // 覆盖尾部
y -= p[i].my;
drawOffScreen.setColor(color);
drawOffScreen.fillOval(x, y, SIZE, SIZE);
}
if (x > AppletWidth || y > AppletHeight) { // 流星飞出窗口，重置流星
p[i].reset();
}
}
repaint();
try {
Thread.sleep(SLEEP);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
class Meteor { // 流星类
int x, y; // 流星的位置
int mx, my; // 下落速度
Color color; // 流星颜色
public Meteor() {
reset();
}
public void reset() {
int rand = (int) (Math.random() * ); //随机生成流星出现位置
if (rand > ) {
x = (int) (Math.random() * );
y = ;
} else {
y = (int) (Math.random() * );
x = ;
}
mx = (int) (Math.random() * + ); //随机生成下落速度和角度
my = (int) (Math.random() * + );
if (COLOR == null || COLOR.length() == ) {
color = new Color(
// 随机颜色
(new Double(Math.random() * )).intValue() + ,
(new Double(Math.random() * )).intValue() + ,
(new Double(Math.random() * )).intValue() + );
} else {
color = Color.decode(COLOR);
}
}
}
}

以上代码就是本文给大家讲述的纯Java代码实现流星划过天空，希望本文分享能够给大家带来意想不到的收获。

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