Question onThread

[Subha Garg]

Given Notice the use of anonymous inner class)

Runnable r = new Runnable()
{
public void run()
{
System.out.println("cat");
}
};
 
Thread t = new Thread(r)
{
public void run()
{
System.out.println("dog");
}
};
t.start();
 

What is the answer:
A. Cat
B. Dog
C. Compilation fails.
D. The code runs with no output.
E. An exception is thrown at runtime.

[Nadeem Khan]

Dog. Coz your code instantiates the anonymous class extending Thread and assigns the object reference to t.

[Subha Garg]

But isn't there a rule that says the runnable object that is passed to the thread gets its run method called.

[Nadeem Khan]

If you didnt have that anonymous class definition , it would have constructed a Thread object using the constructor Thread(Runnable r). BUT here your code instantiates a subclass of Thread (not the Thread class), declared anonymously and assigns its ref to "t". Anonymous class has to do what its created for.