gamethread.java

来自「Source code for j2me game Capture」· Java 代码 · 共 90 行

package cutOff;

/**
 * This class contains the loop that keeps the game running.
 *
 * @author Jeremiah McLeod xdebugx
 */
public class GameThread extends Thread {

  //---------------------------------------------------------
  //   fields

  /**
   * Whether or not this thread has been started.
   */
  boolean myAlreadyStarted;

  /**
   * A handle back to the graphical components.
   */
  cutOffCanvas myCutOffCanvas;
private long runTime;
final int MS_PER_FRAME=25;

  //----------------------------------------------------------
  //   initialization

  /**
   * standard constructor.
   */
  	  GameThread(cutOffCanvas canvas) {
	     	      myCutOffCanvas = canvas;
	  }




  //----------------------------------------------------------
  //   actions

  /**
   * start or pause or unpause the game.
   */
  void go() {
    if(!myAlreadyStarted) {
      myAlreadyStarted = true;
      start();
    } else {
    }
  }

  /**
   * pause the game.
   */
  void pause() {
  }

  /**
   * stops the game.
   */
  static void requestStop() {
  }

  /**
   * start the game..
   */
  public void run() {
       runTime=System.currentTimeMillis();

      while(true) {
      myCutOffCanvas.advance();



      long timeSinceStart=(System.currentTimeMillis()-runTime);
   	  if (timeSinceStart<MS_PER_FRAME) {
   	  try
   	  {
   		   Thread.sleep(MS_PER_FRAME - timeSinceStart);
   	  }
   	  catch (java.lang.InterruptedException e)
   	  {}
}
runTime=System.currentTimeMillis();

}
}

}