为什么不执行run方法？

I'm trying to create a square that can move by pressing keys. When I Compiled & Ran the code it wouldn't move. So I began debugging (as well as I'm capable of). The problem seems to be that the run() function isn't being called. Why is this ? My understanding was that when using the interface Runnable, the run method is called automatically. I posted all the code in action.I'm trying to create a square that can move by