Wait and notify

[Kalyan Anand]

In the producer consumer problem.. we have multiple producer and multiple consumer threads.. so here is a question

1. Producer fills up the content and raises notify()

    
public synchronized void produce() 
{ 
     while (isNotEmpty) 
     { 	
          try 
          { 
               wait(); 
          }
          catch (InterruptedException e) 
          {
                //Ignore
          }
     }
      // Fill content
     notify();
 } 

2. As notify was used it invoked a Producer thread
3. Producer realizes that the list isNotEmpty and it waits.

At the end of step 3 what would happen ?

a. Neither any Producer nor any Consumer executes and it hangs
b. The JVM invokes some thread again because there is no lock on the object
c. The behavior cannot be predicted and its up to JVM
d. None of the above

[Steve Luke]

Which of those options would be your first guess, and why? The key here is that "notify was used". What does notify do?