Thread.currentThread().sleep(time) v/s Thread.sleep(time);

Question

Possible Duplicate:
Java: Thread.currentThread().sleep(x) vs. Thread.sleep(x)

whats the difference between...

Thread.currentThread().sleep(time)

and

Thread.sleep(time);

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one more thing is there anyother method by which i can delay in program without using Thread Class...

Answer 1

1 - they are same.

2 - Thread.sleep is the only way to delay in Java unless you implements your own way ;)

Answer 2

Thread.sleep() is a static method. There is no difference between calling Thread.sleep() and calling Thread.currentThread().sleep(). However, if you use eclipse, the latter form should give you a warning message as you are accessing the static method sleep() in a non-static way.

TimeUnit.sleep() is a fantastic alternative to Thread.sleep(). I personally prefer it because in most cases I want to sleep for whole seconds and I can easily and clearly do this with TimeUnit.SECONDS.sleep(5) as opposed to Thread.sleep(5*1000) or Thread.sleep(5000)

Edit: There is yet another alternative, but it is not at all a desirable alternative. Calling Object.wait() will halt execution in a similar fashion to Thread.sleep(). However, it is inadvisable to do so because first you have to use synchronize(Object) and this method is intended for wait/notify Thread synchronization. Also, there is no guarantee that the Thread will wait for the full time specified as spurious wake-ups from Object.wait() are acceptable for JVM implementations.