Simple java synchronization question

Posted by Misha Koshelev on Stack Overflow See other posts from Stack Overflow or by Misha Koshelev
Published on 2010-06-12T03:34:15Z Indexed on 2010/06/12 4:02 UTC
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java

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synchronized

I was wondering, which is correct:

Option One

class A {
   public void methodOne() {
       synchronized(this) {
           modifyvalue
           notifyAll()
       }
   }

   public void methodTwo() {
       while (valuenotmodified) {
           synchronized(this) {
              wait()
           }
       }
   }

Option Two

class A {
   public void methodOne() {
       modifyvalue
       synchronized(this) {
           notifyAll()
       }
   }

   public void methodTwo() {
       while (valuenotmodified) {
           synchronized(this) {
              wait()
           }
       }
   }

and why?

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