multithreading

[rupika deval]

why thread class is provided when we can create a thread using runnable interface.

[Ulf Dittmer]

Welcome to JavaRanch.

There are times when you need the greater flexibility that extending Thread gives you over implementing Runnable. See ExtendingThreadVsImplementingRunnable for more information.

Since the question has nothing to do with applets -which is what this forum is about- I'll move it to the Threads and Synchronization forum.

[P. Jain]

By implementing runnable you will only get run method of that interface.

Thread class has many more methods that you can use for handling a multi threaded environment.

[Ernest Friedman-Hill]

Note that you can't "create a thread using runnable interface"; the magic code that actually schedules the OS-level thread to run your code in parallel is in the native methods of the Thread class.

[Abhijit Choudhury]

I dont know about other replies but implementing Runnable interface gives you a choice to extend any other class if you want.

You can have
class ABC extends PQR implements Runnable{
...}

You cant inherit PQR if you extend Thread Class can you?

(Multiple Inheritance NOT ALLOWED Remember)