?? racetest1.java
字號:
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();
}
}
運行結(jié)果:
時間片系統(tǒng):
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
非時間片系統(tǒng):
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
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