What is the difference between creating a thread by extending Thread class and by implementing Runnable interface? Which one should prefer?

Correct Answer: When creating a thread by extending the Thread class, it is not mandatory to override the run method (If we are not overriding the run method , it is useless), because Thread class have already given a default implementation for run method But if we are implementing Runnable , it is mandatory to override the run method The preferred way to create a thread is by implementing Runnable interface, because it give loose coupling