Java Phaser getParent() 方法

2025 年 3 月 21 日 | 阅读 2 分钟

Phaser 类的 getParent() 方法用于获取当前 phaser 的父级。如果当前 phaser 没有父级，则返回 null。

语法

它返回当前 phaser 的父级

示例 1

import java.util.concurrent.Phaser;
public class JavaPhaserGetParentExample1
{
    public static void main(String[] args) throws InterruptedException
    { 
         Phaser p = new Phaser(10);
         p.register();
         Phaser pc = p.getParent();
          System.out.println("Thread is sleeping");
          Thread.sleep(5000);
            new JavaPhaserGetParentExample1().test(p);
    }
    void test(final Phaser p)
    {
        new Thread(){
                @Override
                public void run()
                    {
                        System.out.println(Thread.currentThread().getName()+" arrived" );
                       p.arrive();
                      System.out.println("Parent Phaser: "+p);
                    }
               }.start();
    }
}

输出

Thread is sleeping
Thread-0 arrived
Parent Phaser: java.util.concurrent.Phaser@2b71e323[phase = 0 parties = 11 arrived = 1]

示例 2

import java.util.concurrent.Phaser;
public class JavaPhaserGetParentExample2
{
    public static void main(String[] args) throws InterruptedException
    {
          Phaser p = new Phaser(10);
          p.register();
         Phaser pc = p.getParent();
         for(int i=0; i<=5; i++)
          {  
            new JavaPhaserGetParentExample2().test(p);
        } 
   }
    void test(final Phaser p)
    {
        new Thread(){
                @Override
                public void run()
                    {
                       System.out.println(Thread.currentThread().getName()+" arrived" );
                       p.arrive();
                       System.out.println("Parent Phaser: "+p);
                    }
               }.start();	
    }
}

输出

Thread-1 arrived
Parent Phaser: java.util.concurrent.Phaser@2eaa3bae[phase = 0 parties = 11 arrived = 1]
Thread-4 arrived
Thread-3 arrived
Parent Phaser: java.util.concurrent.Phaser@2eaa3bae[phase = 0 parties = 11 arrived = 3]
Thread-0 arrived
Thread-2 arrived
Parent Phaser: java.util.concurrent.Phaser@2eaa3bae[phase = 0 parties = 11 arrived = 5]
Parent Phaser: java.util.concurrent.Phaser@2eaa3bae[phase = 0 parties = 11 arrived = 4]
Thread-5 arrived
Parent Phaser: java.util.concurrent.Phaser@2eaa3bae[phase = 0 parties = 11 arrived = 2]
Parent Phaser: java.util.concurrent.Phaser@2eaa3bae[phase = 0 parties = 11 arrived = 6]

下一话题Java Phaser

Java Phaser getParent() 方法

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示例 1

示例 2

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Java Phaser getParent() 方法

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示例 1

示例 2

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