Question

I faced the following question during an interview:

What are the static and native methods of Thread class?

1. yield
2. start
3. join
4. wait

I know about multi threading concepts, e.g.:

Thread t = new Thread();
t.start(); // Thread starting execution
t.join(); // (or t.wait()) thread state will go to waiting

However I fail to answer the interview question mentioned at the beginning of the post.

Answer 1

See the Java Thread doc.

http://docs.oracle.com/javase/7/docs/api/java/lang/Thread.html

Methods like currentThread() sleep etc.. ate static in nature.

There are few methods like currentThread isAlive etc are native.

Refer this.

yield -> public static native void
start -> public synchronized void start
join  -> public final synchronized void
wait  -> In object class