1. What is the Runnable interface? 2. When should you extend the Thread class? 3. If you create one thread in your program, how many threads actually run? 4. What method must you override when you...

1. What is the Runnable interface?

2. When should you extend the Thread class?

3. If you create one thread in your program, how many threads actually run?

4. What method must you override when you create a thread in your program?

5. How do you define the portion of your program that becomes a thread?