Question

I implemented multithreading through implemnting runnable and overriding run(). I want to suspend the thread inside run().

Please Help me

What should I do in void run(){ } ?

Answer 1

The usual way to do this is to call wait on some object that another thread can then notify. This would be the pattern for your code:

public void run() {
    . . .
    // decide to suspend thread execution:
    synchronized (LOCK) {
        try {
            LOCK.wait();
        } catch (InterruptedException e) {
            // thread was interrupted -- time to return?
        }
    }
    // execution resumes here after interrupt or notify
}

Then some other thread executes this code:

synchronized (LOCK) {
    LOCK.notify(); // or notifyAll();
}

In these code fragments, LOCK is some object that is accessible to both pieces of code. There’s no need for a separate object if it makes sense to use an available object to do the job.