Java Long class

Java Phaser getParent() Method

Last Updated : 17 Mar 2025

The getParent() method of Phaser class is used to get the parent of the current phaser. It returns null there is no parent of the current phaser.

Syntax:

Return:

it returns the parent of current phaser

Example 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();
    }
}

Output:

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

Example 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();	
    }
}

Output:

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]

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Java Phaser getParent() Method

Syntax:

Return:

Example 1

Example 2

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Java Phaser getParent() Method

Syntax:

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Example 1

Example 2

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