Difference in how to start a thread

Question

What is the difference between these two thread implementations?
Thread t = new Thread(new Runnable() {
   public void run() {
      // do work here
t.start();And this...
Thread t = new Thread(){
   public void run() {
      // do work here
t.start();

Answer 1

What is the difference between these two thread implementations?Not much, in a practical sense. In one case you're implementing Runnable; in the other, you're extending Thread. Here's my usual discourse on the matter:
Prefer implementing Runnable to extending Thread. Think of Threads as the workers and Runnables as the job itself. You implement Runnable because your "unit of work" or whatever you want to call it IS-A Runnable -- that is, something that will do its job start-to-finish when you call run. You would only extend Thread if your class IS-A Thread -- that is, it has a reason to do everything Thread does, and you need to slightly add to or modify Thread's behavior.