Java Phaser getRoot() Method

The getRoot() Method is of Phaser Class. This method is used to get the root of the current phaser.

Syntax

Return

It returns the root of the current phaser.

Example 1

import java.util.concurrent.Phaser;
public class PhaserGetRootExample1
{
    public static void main(String[] args) throws InterruptedException
    {
        int i, j;
          Phaser p = new Phaser();
          p.register();
          int pc = p.getPhase();
          System.out.println("Phasecount is "+pc);
          for(i=0;i<=5;i++)
          {
          new PhaserGetRootExample1().testPhaser(p);
    
          }
              System.out.println("Root : "+p.getRoot());
          Thread.sleep(5000);
          pc = p.getPhase();
          System.out.println("Phasecount is "+pc); 
    }
    private void testPhaser(final Phaser phaser)
    {
        new Thread(){
                @Override
                public void run()
                    {
                        System.out.println(Thread.currentThread().getName()+" arrived");
                       
                    }
               }.start();
    }
}

Test it Now

Output:

Phasecount is 0
Thread-0 arrived
Thread-1 arrived
Root : java.util.concurrent.Phaser@7852e922[phase = 0 parties = 1 arrived = 0]
Thread-4 arrived
Thread-3 arrived
Thread-2 arrived
Thread-5 arrived

Example 2

import java.util.concurrent.Phaser;
public class PhaserGetRootExample2
{
    public static void main(String[] args) throws InterruptedException
    {
        int i, j;
          Phaser p = new Phaser();
          p.register();
          int pc = p.getPhase();
          System.out.println("Phasecount is "+pc);
          for(i=0;i<=5;i++)
          {
          new PhaserGetRootExample2().testPhaser(p);
          if(i==3)
          {
          new PhaserGetRootExample2().testPhaser(p);
           System.out.println("Root : "+p.getRoot());
          }
    
          }
              System.out.println("Root : "+p.getRoot());
          Thread.sleep(5000);
          pc = p.getPhase();
          System.out.println("Phasecount is "+pc);
           
    }
    private void testPhaser(final Phaser phaser)
    {
        new Thread(){
                @Override
                public void run()
                    {
                        System.out.println(Thread.currentThread().getName()+" arrived");
                       
                    }
               }.start();
    }
}

Test it Now

Output:

Phasecount is 0
Thread-1 arrived
Root : java.util.concurrent.Phaser@7852e922[phase = 0 parties = 1 arrived = 0]
Thread-0 arrived
Root : java.util.concurrent.Phaser@7852e922[phase = 0 parties = 1 arrived = 0]
Thread-4 arrived
Thread-3 arrived
Thread-5 arrived
Thread-2 arrived
Thread-6 arrived
Phasecount is 0

Next TopicJava Phaser

← prev next →