Particular Thread Count

Question

I want to know how many active threads are there for a particular Thread class. Lets say I have a class T which extends thread. In some other class (Ex: Demo) , I want to get t

Answer 1

You can use Thread.enumerate():

public int countThreadsOfClass(Class clazz) {
    Thread[] tarray = new Thread[Thread.activeCount()];
    Thread.enumerate(tarray);
    int count = 0;
    for(Thread t : tarray) {
        if(clazz.isInstance(t))
            count++;
    }
    return count;
}