linestimertask.java

画布实现屏幕保护程序

import java.util.*;

public  class LinesTimerTask extends TimerTask {
    private ScreenSaverCanvas canvas;
    private Random random;

    public LinesTimerTask(ScreenSaverCanvas canvas){
        random = new Random();
        this.canvas = canvas;
    }
    public final void run (){
       canvas.endX = (random.nextInt()>>>1) % canvas.getWidth();
       canvas.endY = (random.nextInt()>>>1) % canvas.getHeight();
       canvas.linesDrawn++;canvas.repaint();
    }
}