Java static final values replaced in code when compiling?

Question

In java, say I have the following

==fileA.java==
class A
{  
    public static final int SIZE = 100;
}  

Then in another file I use this valu

Answer 1

There is an exception to this:-

If static final field is null at the time of compiling then it doesn't get replaced with null (which is actually its value)

A.java

class A{
     public static final String constantString = null;
}

B.java

class B{
     public static void main(String... aa){
         System.out.println(A.constantString);
     }
}

Compile both A.java and B.java and run java B

Output will be null

---

Now Update A.java with following code and compile only this class.

class A{
     public static final String constantString = "Omg! picking updated value without re-compilation";
}

Now run java B

Output will be Omg! picking updated value without re-compilation