Assignments

[Satya Baswa]

1. final int i=127;
2. byte b=i;

This piece of code works...

1. final int i;
2. i=127;
3. byte b=i;

This piece of code is not working.

What is the difference in the above two pieces of code?

[Tarun Kumar]

in first case since final object is assigned it's value at the declarion time hence compiler knows its values is <=127 ,thus allowing to compile.
in second case since final varible is not assigned at the declaration time,hence compiler can not be known about the later assigned value.
thus compiler is not sure wheather value is <=127,thus not allowing to compile.