cloud.java

java 写的飞行射击游戏。是游戏的基础。可以参考一下。对游戏开发有帮助。

package airplane;

import java.awt.Image;
import java.applet.Applet;
import java.util.*;

public class Cloud extends SuperSprite implements Runnable{

  int AppletWidth, AppletHeight;
  int moveWay;  //白云移动的方向：0 = 从左到右；1 = 从右到左
  int cloudImgWidth,cloudImgHeight;
  Thread cloudThread;
  Random R;
  int moveStep = 0;
  public Cloud(Image cloudImg,
               int startX,
               int startY,
               int moveWay,
               Applet Game,
               int AppletWidth,
               int AppletHeight) {

    super(cloudImg, startX, startY, Game); //调用父类的创建方法
    this.moveWay = moveWay;
    cloudImgWidth = cloudImg.getWidth(Game);
    cloudImgHeight = cloudImg.getHeight(Game);
    moveStep = cloudImgWidth/100;
    this.AppletWidth = AppletWidth;
    this.AppletHeight = AppletHeight;
    setVisible(true); //不可见
    setMove(true); //不可移动
    R = new Random();
    cloudThread = new Thread(this);
    cloudThread.setPriority(Thread.MAX_PRIORITY);
    cloudThread.start();
  }

  public void updateState() { //更新白云Sprite的状态
    if (active == true) {
      switch (moveWay) {
      case 0: { //左 --> 右
        if (X > AppletWidth) { //当白云穿过右边界时,重新从左开始
          do{
            Y = R.nextInt() % (AppletHeight - cloudImgHeight);
          }while(Y<=0);
          X = -cloudImgWidth;
        } else
          X = X + moveStep; //向右移动1像素
        break;
      }
      case 1: { //右  --> 左
        if (X < -cloudImgWidth) { //当白云穿过左边界时,重新从右开始
          do{
            Y = R.nextInt() % (AppletHeight - cloudImgHeight);
          }while(Y<=0);
          X = AppletWidth;
        } else
          X = X - moveStep; //向左移动1像素
      }
      }
    }
  }

    public void stop() { //stop()方法
        cloudThread = null;
    }

    public void run() {
        while (cloudThread!=null) {
          try {
              Thread.sleep(100);
          } catch (InterruptedException E) {}
          this.updateState();
        }
    }
}