Most developers work with threads at one point or another. It can be important to know which threads are active to accomplish a given task. The following API activeCount on the Thread class returns the count of the active threads in the current run time.
public class ActiveThreadsCount
{
public static void main(String args[])
{
ActiveThreadsCount activeThreadsCount = new ActiveThreadsCount();
activeThreadsCount.countThreads();
}
private void countThreads()
{
//This can be invoked at a complex code segment and you cn determine the count
int threadsCount = java.lang.Thread.activeCount();
System.out.println("Count of active threads: " + threadsCount);
}
}