Object Initialization

[Srinivas Kumar]

import java.util.*;

public class AllFinals
{
final Vector v;
public AllFinals()
{
}
}

The above code will


1.Not compile. Vector v is not initialized.
2.Will compile and throw a RuntimeException
3.Will compile and not throw any Exception during runtime. V is initalized to null.

Answer is 1.
My question is v should get initialized to null (default value for an object) and if that is the case answer should be 3.
can anybody explain?

[Antonio Trapero]

v is final, cause of that, you must initialize it before contructor ends.

[Mahendra Shelke]

You are correct the answer is 1 , that is because v is final without any initialization parameters i.e it is a blank final and must be initialized in the constructor to null or any other valid value you wish to.

[karnatam narendraprasad]

final variables can assign a value once.the compiler will not initilaze any default value

Narendra

[Srinivas Kumar]

Thanks to all for the explanation