Surprisingly no error...

[sonir shah]

public class Test005
    {    
        public static void main(String args[])
        {
            Thread.yield();                     //1
            Thread t = Thread.currentThread();        
            synchronized(t) {                   //2
                t.notify();                     //3
            }
            Object o = new Object();        
            System.out.println(null == o);      //4  
        }    
    }

Options:
A: The code does not compile due to line //1.
B: The code does not compile due to line //2.
C: The code does not compile due to line //3.
D: The code does not compile due to line //4.
E: There is nothing wrong with the code.
Ans: E)Nothing wrong with the code..
My question is can we implement Thread.yield() is called when is no start() and no run ().Should it compile? And Surprisingly , the output printed is "false"!!!
Can any one explain me?
Sonir

[Valentin Crettaz]

When you run your program (the main method is invoked by the interpreter) you have at least one thread running, the "main" thread. Thus invoking Thread.yield() is perfectly legal...
HIH
[ January 21, 2002: Message edited by: Valentin Crettaz ]

[Matthew Phillips]

The reason "false" is output is that o is a reference to an object. It does not contain a null value.