prioritydemo.java

来自「Java 程序设计源码 只提供了部分」· Java 代码 · 共 57 行

class Priority implements Runnable {
  int count;
  Thread thrd;

  static boolean stop = false;
  static String currentName;

  Priority(String name) {
    thrd = new Thread(this,name);

    count = 0;
    currentName = name;
  }

  public void run() {
    System.out.println(thrd.getName() + " excuting.");

    do {
      count++;

      if(currentName.compareTo(thrd.getName()) != 0){
        currentName = thrd.getName();
        System.out.println("at " + currentName);
      }
    }
    while((stop == false) && (count < 100000000));
    stop = true;

    System.out.println("\n" + thrd.getName() + " end.");
  }
}

public class PriorityDemo {
  public static void main(String[] args) {
    Priority p1 = new Priority("high priority");
    Priority p2 = new Priority("low priority");

    p1.thrd.setPriority(Thread.NORM_PRIORITY + 2);
    p2.thrd.setPriority(Thread.NORM_PRIORITY - 2);

    p1.thrd.start();
    p2.thrd.start();

    try {
      p1.thrd.join();
      p2.thrd.join();
    }
    catch(InterruptedException e) {
      System.out.println("main Thread Interrupted");
    }

    System.out.println("\n high priority count: " + p1.count);

    System.out.println("\n low priority count: " + p2.count);
  }
}