I get exception when using Thread.sleep(x) or wait()

Question

I have tried to delay - or put to sleep - my Java program, but an error occurs.

I'm unable to use Thread.sleep(x) or wait(). The same error message appears:

unreported exception java.lang.InterruptedException; must be caught or declared to be thrown.

Is there any step required before using the Thread.sleep() or wait() methods?

Answer 1

You have a lot of reading ahead of you. From compiler errors through exception handling, threading and thread interruptions. But this will do what you want:

try {     Thread.sleep(1000);                 //1000 milliseconds is one second. } catch(InterruptedException ex) {     Thread.currentThread().interrupt(); } 

Answer 2

As other users have said you should surround your call with a try{...} catch{...} block. But since Java 1.5 was released, there is TimeUnit class which do the same as Thread.sleep(millis) but is more convenient. You can pick time unit for sleep operation.

try {     TimeUnit.NANOSECONDS.sleep(100);     TimeUnit.MICROSECONDS.sleep(100);     TimeUnit.MILLISECONDS.sleep(100);     TimeUnit.SECONDS.sleep(100);     TimeUnit.MINUTES.sleep(100);     TimeUnit.HOURS.sleep(100);     TimeUnit.DAYS.sleep(100); } catch (InterruptedException e) {     //Handle exception } 

Also it has additional methods: TimeUnit Oracle Documentation