screensaver.java~2~

来自「自己做的几个j2me程序例子。。只要在Jbuilder里open project」· JAVA~2~ 代码 · 共 38 行

package screensaver;

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import java.util.*;

public class ScreenSaver extends MIDlet {
  private Display  display;       // 当前舞台
  private Timer timer;            // 定时器
  private LinesTimerTask task;         // 定时执行的任务
  private ScreenSaverCanvas canvas;   // 绘制线条的类

  public ScreenSaver()
  {
    display = Display.getDisplay(this);
    canvas  = new ScreenSaverCanvas(this);

    // 每隔半秒钟执行一次任务
    timer = new Timer();
    task = new LinesTimerTask(canvas);
    timer.schedule(task, 0, 500);
  }

  protected void startApp()
  {
    display.setCurrent( canvas );
  }

  protected void pauseApp() { }

  protected void destroyApp( boolean unconditional ) { }

  public void exitMIDlet()
  {
    destroyApp(true);
    notifyDestroyed();
  }