With this example we are going to demonstrate how to get the number of current threads in a JVM. We are using the ThreadMXBean that is the management interface for the thread system of the Java virtual machine. In short, to get the number of current threads you should:
- Get the managed bean for the thread system of the Java virtual machine, that is the ThreadMXBean, using the
getThreadMXBean()API method of ManagementFactory. - Use
getThreadCount()API method of ThreadMXBean. It returns the current number of live threads including both daemon and non-daemon threads.
Let’s take a look at the code snippet that follows:
package com.javacodegeeks.snippets.core;
import java.lang.management.ManagementFactory;
import java.lang.management.ThreadMXBean;
public class ThreadCounter {
public static void main(String[] args) {
// Get JVM's thread system bean
ThreadMXBean bean = ManagementFactory.getThreadMXBean();
// Get the number of current live threads
int counter = bean.getThreadCount();
System.out.println("Threads = " + counter);
}
}
Output:
Threads = 5
This was an example of how to get the number of current threads in Java.
