How do I get number of active thread in current thread?

In this example you’ll see how to obtain the number of active thread in the current thread. You can use the Thread.activeCount() method to get this information.

package org.kodejava.example.lang;

public class CountActiveThread {
    public static void main(String[] args) {
        Thread t = new Thread(new Runnable() {
            public void run() {

        // Get the number of active threads in the current thread's
        // thread group.
        int activeThread = Thread.activeCount();
        System.out.format("Number of active threads of %s is %d %n",
                Thread.currentThread().getName(), activeThread);

Wayan Saryada

Programmer, runner, recreational diver, currently living in the island of Bali, Indonesia. Mostly programming in Java, creating web based application with Spring Framework, Hibernate / JPA.

Leave a Reply