Java Phaser register() 方法

2025 年 3 月 21 日 | 阅读 2 分钟

Phaser 类的 register() 方法用于向 Phaser 添加一个新的未到达的参与者。如果 Phaser 已终止，则此方法无效并返回负值。

语法

它返回已注册参与者的阶段编号。

抛出

IllegalStateException - 当注册的参与者数量过多时，将抛出此异常。

示例 1

import java.util.concurrent.Phaser;
public class JavaPhaserRegisterExample1
{
    public static void main(String[] args) throws InterruptedException
    {
          Phaser p = new Phaser();
          p.register();
          System.out.println("Phaser Object is register...");
          int pc = p.getPhase();
          System.out.println("Initial Phase count is "+pc);
          new JavaPhaserRegisterExample1().test(p);
    }
     private void test(final Phaser p)
    {
        new Thread(){
                @Override
                public void run()
                    {
                        System.out.println(Thread.currentThread().getName()+" arrived");
                        p.arriveAndAwaitAdvance();
                    }
               }.start();
    }
}

输出

Phaser Object is register...
Initial Phase count is 0
Thread-0 arrived

示例 2

import java.util.concurrent.Phaser;
public class JavaPhaserRegisterExample2
{
    public static void main(String[] args) throws InterruptedException
    {
          Phaser p = new Phaser();
          p.register();
          System.out.println("Phaser Object is register...");
          int pc = p.getPhase();
          System.out.println("Initial Phase count is "+pc);
          System.out.println("Thread is sleeping");
          Thread.sleep(5000);
          new JavaPhaserRegisterExample2().test(p);
          new JavaPhaserRegisterExample2().test(p);
          new JavaPhaserRegisterExample2().test(p);
          new JavaPhaserRegisterExample2().test(p);
          pc = p.getPhase();
          System.out.println("Final Phase count after arrival of Thread is "+pc);
    }
    void test(final Phaser p)
    {
        new Thread(){
                @Override
                public void run()
                    {
                        System.out.println(Thread.currentThread().getName()+" arrived");
                        p.arriveAndAwaitAdvance();
                    }
               }.start();
    }
}

输出

Phaser Object is register...
Initial Phase count is 0
Thread is sleeping
Thread-0 arrived
Thread-2 arrived
Final Phase count after arrival of Thread is 1
Thread-3 arrived
Thread-1 arrived

下一话题Java Phaser

Java Phaser register() 方法

语法

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示例 1

示例 2

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Java Phaser register() 方法

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示例 1

示例 2

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