Write a Java program to count active threads of a thread group

The Java code demonstrates how to obtain the number of active threads within the current thread's thread group using the activeCount() method. In the ActiveGroup class:

The main method is the entry point of the program.
Thread.currentThread().getThreadGroup() retrieves the thread group associated with the currently executing thread (main thread in this case).
activeCount() is called on the obtained thread group to get the count of active threads in that group.
The count of active threads is then printed to the console using System.out.println().

The output will vary based on the number of active threads within the current thread's thread group at the moment the activeCount() method is called. Please note that thread counts can change rapidly in a multithreaded environment, so the exact number of active threads can differ between runs.

Source Code

public class ActiveGroup
{
	public static void main(String[] args)
	{
		ThreadGroup threadGroup = Thread.currentThread().getThreadGroup();
		int activeThreads = threadGroup.activeCount();
		System.out.println("Active threads in the thread group: " + activeThreads);
	}
}

Output

Active threads in the thread group: 1

Write a Java program to count active threads of a thread group

Source Code

Output

Example Programs

Thread Programs in Java