How do I get thread group of a thread?

Use the getThreadGroup() method of Thread class to get the thread group to which the thread belongs.

package org.kodejava.example.lang;

public class GetThreadGroup {
    public static void main(String[] args) {
        //
        // Create thread groups
        //
        ThreadGroup group = new ThreadGroup("ThreadGroup");
        ThreadGroup anotherGroup = new ThreadGroup(group, "AnotherGroup");

        //
        // Create threads and placed into thread group
        //
        Thread t1 = new Thread(group, new FirstThread(), "Thread1");
        Thread t2 = new Thread(anotherGroup, new FirstThread(), "Thread2");

        //
        // Start the threads
        //
        t1.start();
        t2.start();

        //
        // Use getThreadGroup() method of Thread class to get the object
        // of ThreadGroup then use the getName() method to get the name
        // of thread group.
        //
        System.out.format("%s is a member of %s%n", t1.getName(),
                t1.getThreadGroup().getName());
        System.out.format("%s is a member of %s%n", t2.getName(),
                t2.getThreadGroup().getName());
    }
}

class FirstThread implements Runnable {
    public void run() {
        System.out.println("Start..");
    }
}
Wayan Saryada

Wayan Saryada

A programmer, runner, recreational diver, currently living in the island of Bali, Indonesia. Mostly programming in Java, creating web based application with Spring Framework, JPA, etc. If you need help on Java programming you can hire me on Fiverr.
Wayan Saryada

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