tankthread.java

1. 创建一个独立的线程类

package tankgame611;
import java.applet.Applet;

public class TankThread extends Thread {
  Thread tankThread;
  Applet GameApplet;
  PlayTankSprite playerTank;
  EnemyTankSprite[] enemyTank;

  public TankThread(Applet GameApplet,
                    PlayTankSprite playerTank,
                    EnemyTankSprite[] enemyTank) {
    this.playerTank=playerTank;
    this.enemyTank=enemyTank;
    this.GameApplet=GameApplet;
  }
  public void run(){
    while(tankThread!=null){
      GameApplet.repaint();
      try {
        Thread.sleep(10);
      }catch(InterruptedException E){}
      if(playerTank.active==true){
        playerTank.updatePos(playerTank.direction);
      }
      for(int i=0;i<enemyTank.length;i++){
        if(enemyTank[i].active==true){
        enemyTank[i].updateState(enemyTank[i].direction);
      }
      }
    }
  }
  public void startRunning(){
    tankThread=new Thread(this);
    tankThread.start();
  }
  public void stopRunning(){
    tankThread=null;
  }
}