Java 实例 _ 线程优先级设置

public class SimplePriorities extends Thread {
 private int countDown = 5;
 private volatile double d = 0; 
 public SimplePriorities(int priority) {
 setPriority(priority);
 start();
 }
 public String toString() {
 return super.toString() + ": " + countDown;
 }
 public void run() {
 while(true) {
 for(int i = 1; i < 100000; i++)
 d = d + (Math.PI + Math.E) / (double)i;
 System.out.println(this);
 if(--countDown == 0) return;
 }
 }
 public static void main(String[] args) {
 new SimplePriorities(Thread.MAX_PRIORITY);
 for(int i = 0; i < 5; i++)
 new SimplePriorities(Thread.MIN_PRIORITY);
 }
}