如何将 CountDownLatch object 传递给线程的构造函数？

Question

I was studying Threads in Java and I saw that Threads have the following types of constructors.

Thread()
Thread(Runnable target)
Thread(Runnable target, String name)
Thread(String name): Allocates a new Thread object
Thread(ThreadGroup group, Runnable target)
Thread(ThreadGroup group, Runnable target, String name)
Thread(ThreadGroup group, Runnable target, String name, long stackSize)
Thread(ThreadGroup group, String name)

But while trying out a few sample programs, I saw that the below code does not give any error:

class MyThread implements Runnable {
String name;
CountDownLatch cdl;

MyThread(CountDownLatch cdl, String name) {
    this.name = name;
    this.cdl = cdl;
    new Thread(this);
}   

So, more specifically, what is the line new Thread(this) doing?

Answer 1

The code is actually not a Thread but a Runnable object. So new Thread(this) means constructing a new Thread object given with constructor argument a Runnable object ( MyThread itself).