Why the first Thread.activeCount() return 1 but another return 2 in my code?

Question

Here is my application:

public class NamedThread extends Thread {
    /* This will store name of the thread */

    String name;

    @Override
    public void r         


        

Answer 1

public static void main(String[] args) {
    System.out.println(Thread.activeCount());

    //doSomething()
}

The code above output 2

GC occupies a thread, so you get 2, instead of 1

This function is designed for debugging

If you run on debug mode, you would get 1