Java 线程状态

Java线程教程 - Java线程状态

停止，挂起和恢复线程

下面的代码演示了如何模拟Thread类中的stop()，suspend()和resume()方法。

public class Main extends Thread {
  private volatile boolean keepRunning = true;
  private boolean suspended = false;
  public synchronized void stopThread() {
    this.keepRunning = false;
    this.notify();
  }

  public synchronized void suspendThread() {
    this.suspended = true;
  }

  public synchronized void resumeThread() {
    this.suspended = false;
    this.notify();
  }

  public void run() {
    System.out.println("Thread started...");
    while (keepRunning) {
      try {
        System.out.println("Going to sleep...");
        Thread.sleep(1000);
        synchronized (this) {
          while (suspended) {
            System.out.println("Suspended...");
            this.wait();
            System.out.println("Resumed...");
          }
        }
      } catch (InterruptedException e) {
        e.printStackTrace();
      }
    }
  }
  public static void main(String[] args) throws Exception {
    Main t = new Main();
    t.start();
    Thread.sleep(2000);
    t.suspendThread();
    Thread.sleep(2000);
    t.resumeThread();
    Thread.sleep(2000);
    t.stopThread();
  }
}

上面的代码生成以下结果。