Java 实例 - 查看线程优先级

以下实例演示了如何使用 getThreadId() 方法获取线程id：

Main.java 文件

  1. public class Main extends Object {
  2.    private static Runnable makeRunnable() {
  3.       Runnable r = new Runnable() {
  4.          public void run() {
  5.             for (int i = 0; i < 5; i++) {
  6.                Thread t = Thread.currentThread();
  7.                System.out.println("in run() - priority="
  8.                + t.getPriority()+ ", name=" + t.getName());
  9.                try {
  10.                   Thread.sleep(2000);
  11.                }
  12.                catch (InterruptedException x) {
  13.                }
  14.             }
  15.          }
  16.       };
  17.       return r;
  18.    }
  19.    public static void main(String[] args) {
  20.       System.out.println("in main() - Thread.currentThread().getPriority()=" + Thread.currentThread().getPriority());
  21.       System.out.println("in main() - Thread.currentThread().getName()="+ Thread.currentThread().getName());
  22.       Thread threadA = new Thread(makeRunnable(), "threadA");
  23.       threadA.start();
  24.       try {
  25.          Thread.sleep(3000);
  26.       }
  27.       catch (InterruptedException x) {
  28.       }
  29.       System.out.println("in main() - threadA.getPriority()="+ threadA.getPriority());
  30.    }
  31. }

以上代码运行输出结果为：

  1. in main() - Thread.currentThread().getPriority()=5
  2. in main() - Thread.currentThread().getName()=main
  3. in run() - priority=5, name=threadA
  4. in run() - priority=5, name=threadA
  5. in main() - threadA.getPriority()=5
  6. in run() - priority=5, name=threadA
  7. in run() - priority=5, name=threadA
  8. in run() - priority=5, name=threadA