java好玩小游戏源代码

import java.applet.Applet;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Image;

//在applet中支持线程，需要实现Runnable接口
public class CityInThunder extends Applet implements Runnable
{
private Thread thread = null; //applet支持的线程

private boolean no_thunder = true; //没有闪电的标志变量

private boolean thunder = true; //有闪电的标志变量

private int[] light;

private int[] b1;

private int[] b2;

private Color whiteSky = new Color(0, 0, 65), yellowSky = new Color(144,
40, 40);//白色闪电、黄色闪电

private Image buffer, image;

private String delay = "3";

public void init() {
//初始化applet
String imageName = getParameter("Image1");
image = getImage(getCodeBase(), imageName);
light = new int[getSize().height];
b1 = new int[getSize().height];
b2 = new int[getSize().height];
buffer = this.createImage(getSize().width, getSize().height);
}

public void paint(Graphics g) {
int i, thr;
if (no_thunder) //没有闪电
{
g.setColor(Color.black); //设背景色为黑色
g.fillRect(0, 0, getSize().width, getSize().height); //填充背景色
g.drawImage(image, 0, 0, this); //输出City.gif
} else //有闪电
{
if (thunder) //白色闪电
g.setColor(whiteSky); //设背景色为白色
else
//黄色闪电
g.setColor(yellowSky); //设背景色为黄色
g.fillRect(0, 0, getSize().width, getSize().height); //填充背景色
//输出闪电图像
thr = (int) (0.8F * getSize().height);
for (i = 1; i < getSize().height; i++) {
if (i < thr) { //输出闪电周围的灰色矩形
g.setColor(Color.darkGray);
g.drawRect(light[i] - 4, i, 3, 1);
g.drawRect(light[i] + 2, i, 3, 1);
g.setColor(Color.gray);
g.drawRect(light[i] - 1, i, 1, 1);
g.drawRect(light[i] + 1, i, 1, 1);
}
if (thunder) { //白色闪电
g.setColor(Color.white);
} else
//黄色闪电
g.setColor(Color.yellow);
g.drawLine(light[i], i, light[i - 1], i - 1);
if (b1[i] >= 0) { //输出闪电折线
g.drawLine(b1[i], i, b1[i - 1], i - 1);
}
if (b2[i] >= 0) { //输出闪电折线
g.drawLine(b2[i], i, b2[i - 1], i - 1);
}
}
//输出城市图像city.gif
g.drawImage(image, 0, 0, this);
thunder = !thunder;
}
}

void drawBuffer() {
//调用paint()方法
Graphics g;
g = buffer.getGraphics();
paint(g);
}

public void start() {
//启动applet，创建并启动线程
if (thread == null) {
thread = new Thread(this);
thread.start();
}
}

public void stop() {
if (thread != null) {
thread.stop();
thread = null;
}
}

void createThunder() {
//生成闪电的坐标数组数据
int i;
int bs1, bs2; //开始位置的坐标
int be1, be2; //结束位置的坐标
light[0] = (int) (Math.random() * getSize().width); //随机产生闪

电出现的位置
b1[0] = light[0];
b2[0] = light[0];
bs1 = (int) (Math.random() * getSize().height) + 1;
bs2 = (int) (Math.random() * getSize().height) + 1;
be1 = bs1 + (int) (0.5 * Math.random() * getSize().height) + 1;
be2 = bs2 + (int) (0.5 * Math.random() * getSize().height) + 1;
for (i = 1; i < getSize().height; i++) {
light[i] = light[i - 1] + ((Math.random() > 0.5) ? 1 : -1);
b1[i] = light[i];
b2[i] = light[i];
}
for (i = bs1; i < getSize().height; i++) {
b1[i] = b1[i - 1] + ((Math.random() > 0.5) ? 2 : -2);
}
for (i = bs2; i < getSize().height; i++) {
b2[i] = b2[i - 1] + ((Math.random() > 0.5) ? 2 : -2);
}
for (i = be1; i < getSize().height; i++) {
b1[i] = -1;
}
for (i = be2; i < getSize().height; i++) {
b2[i] = -1;
}
}

public void run() {
//启动进程

Graphics g;
while (true) {
try {
//输出图像
drawBuffer();
g = this.getGraphics();
g.drawImage(buffer, 0, 0, this);
//线程休眠，时间随机产生
Thread.sleep((int) (Integer.parseInt(delay) * 1000 * Math
.random()));
//无闪电标记变量置位
no_thunder = false;
//创建闪电
createThunder();
//输出图像
drawBuffer();
g = this.getGraphics();
g.drawImage(buffer, 0, 0, this);
//线程休眠1秒
Thread.sleep(1000);
//无闪电标记变量置位
no_thunder = true;
} catch (InterruptedException e) {
stop();//发生异常，停止线程
}
}
}
}