sleep from main thread is throwing InterruptedException

Question

I have the main thread of execution which spawns new threads. In the main thread of execution in main() I am calling Thread.sleep(). When do I get an Unhand

Answer 1

What you see is a compilation error, due to the fact that you didn't handle the checked exception (InterruptedException in this case) properly. Handling means doing one of the following:

1) Declaring the method as throws InterruptedException, thus requiring the caller to handle the exception

2) Catching it with a try{..}catch(..){..} block. For example:

try {
    Thread.sleep(1500);
} catch(InterruptedException e) {
    System.out.println("got interrupted!");
}

InterruptedException is used to indicate that the current thread has been interrupted by an external thread while it was performing some blocking operation (e.g. interruptible IO, wait, sleep)

Answer 2

At the line where you're definition of main starts, just include throws Exception. I too was facing similar problem, and this helped. After this inclusion, you need not include the Thread.sleep(xx); inside a try-catch statement

Answer 3

Thread.sleep(t);

This is how you can make your thread wait. where t is in milliseconds. It is working fine in my main method, so to find out your problem it would be better if you can provide your code here.