如何獲取正在運行的線程的優先級？

解決方法

下麵的例子使用setPriority()方法打印正在運行的線程的優先級。

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);
   }
} 

結果

上麵的代碼示例將產生以下結果。

Thread[Thread-0,10,main]: 5
Thread[Thread-0,10,main]: 4
Thread[Thread-0,10,main]: 3
Thread[Thread-0,10,main]: 2
Thread[Thread-0,10,main]: 1
Thread[Thread-1,1,main]: 5
Thread[Thread-1,1,main]: 4
Thread[Thread-1,1,main]: 3
Thread[Thread-1,1,main]: 2
Thread[Thread-1,1,main]: 1
Thread[Thread-2,1,main]: 5
Thread[Thread-2,1,main]: 4
Thread[Thread-2,1,main]: 3
Thread[Thread-2,1,main]: 2
Thread[Thread-2,1,main]: 1
.
.
.