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What is the purpose of Thread Groups in Java?

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Pragya Keshap answered on February 4, 2023 Popularity 6/10 Helpfulness 1/10

answer What is the purpose of Thread Groups in Java?

What is the purpose of Thread Groups in Java?

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In Java, every thread belongs to a group of threads.

The JDK class java.lang.ThreadGroup provides methods to handle

a whole group of Threads.

With the help of these methods we can interrupt all threads of a

group or set the maximum priority of all threads of a group.

So a thread group is used for taking collective actions on a group of

threads

import java.lang.*;
class NewThread extends Thread 
{
    NewThread(String threadname, ThreadGroup tgob)
    {
        super(tgob, threadname);
        start();
    }
public void run()
    {
  
        for (int i = 0; i < 10; i++) 
        {
            try 
            {
                Thread.sleep(10);
            }
            catch (InterruptedException ex) 
            {
              System.out.println("Thread " + Thread.currentThread().getName()
                                   + " interrupted");
            }
        }
        System.out.println(Thread.currentThread().getName() + 
              " finished executing");
    }
} 
public class ThreadGroupDemo 
{
    public static void main(String arg[]) throws InterruptedException,
        SecurityException, Exception
    {
        // creating the thread group
        ThreadGroup gfg = new ThreadGroup("Parent thread");
        ThreadGroup gfg_child = new ThreadGroup(gfg, "child thread");
  
        // daemon status is set to true
        gfg.setDaemon(true);
  
        // daemon status is set to true
        gfg_child.setDaemon(true);
        NewThread t1 = new NewThread("one", gfg);
        System.out.println("Starting " + t1.getName());
        NewThread t2 = new NewThread("two", gfg);
        System.out.println("Starting " + t2.getName());
  
        // string equivalent of the parent group
        System.out.println("String equivalent: " + gfg.toString());
    }
}

https://www.geeksforgeeks.org/java-lang-threadgroup-class-java/

Popularity 6/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: java

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Contributed on Feb 04 2023

Pragya Keshap

0 Answers Avg Quality 2/10

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