Java Thread getThreadGroup() method

The getThreadGroup() method of thread class is used to return the thread's thread group to which this thread belongs. This method returns null if this thread has died (been stopped).

Syntax

Return

This method returns the thread group of the thread.

Example

class JavaGetThreadGroupExp implements Runnable {
    public void run() 
    {
        System.out.println("javatpoint");
    }
}
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 JavaGetThreadGroupExp(), "Thread-1");
        Thread t2 = new Thread(anotherGroup, new JavaGetThreadGroupExp(), "Thread-2");

        // Start the threads
        t1.start();
        t2.start();
        
        // returns the Thread Group to which this thread belongs
        System.out.println(t1.getName() +" is a member of " + t1.getThreadGroup().getName());
        System.out.println(t2.getName()+ " is a member of "+ t2.getThreadGroup().getName());
    }
}

Test it Now

Output:

Thread-1 is a member of ThreadGroup
Thread-2 is a member of AnotherGroup
javatpoint
javatpoint

The above example use getThreadGroup() method of Thread class to get the object of ThreadGroup then use the getName() method to get the name of the thread group.

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