racetest1.java

几个简单的java学习代码

class SelfishRunner extends Thread {

    private int tick = 1;
    private int num;

    public SelfishRunner(int num) {
        this.num = num;
    }

    public void run() {
        while (tick < 400000) {
            tick++;
            if ((tick % 50000) == 0)
                System.out.println("Thread #" + num + ", tick = " + tick);
        }
    }
}


public class RaceTest1 {

    private final static int NUMRUNNERS = 2;

    public static void main(String[] args) {
        SelfishRunner[] runners = new SelfishRunner[NUMRUNNERS];

        for (int i = 0; i < NUMRUNNERS; i++) {
            runners[i] = new SelfishRunner(i);
            runners[i].setPriority(2);
        }
        for (int i = 0; i < NUMRUNNERS; i++)
            runners[i].start();
    }
}

运行结果：

时间片系统：
Thread #1, tick = 50000
Thread #0, tick = 50000
Thread #0, tick = 100000
Thread #1, tick = 100000
Thread #1, tick = 150000
Thread #1, tick = 200000
Thread #0, tick = 150000
Thread #0, tick = 200000
Thread #1, tick = 250000
Thread #0, tick = 250000
Thread #0, tick = 300000
Thread #1, tick = 300000
Thread #1, tick = 350000
Thread #0, tick = 350000
Thread #0, tick = 400000
Thread #1, tick = 400000

非时间片系统：
Thread #0, tick = 50000
Thread #0, tick = 100000
Thread #0, tick = 150000
Thread #0, tick = 200000
Thread #0, tick = 250000
Thread #0, tick = 300000
Thread #0, tick = 350000
Thread #0, tick = 400000
Thread #1, tick = 50000
Thread #1, tick = 100000
Thread #1, tick = 150000
Thread #1, tick = 200000
Thread #1, tick = 250000
Thread #1, tick = 300000
Thread #1, tick = 350000
Thread #1, tick = 400000