How this is possible? How am I able to change variables marked as final?
public class Main
{
public static void main(String[] args)
{
final int NUM;
NUM = 22;
NUM = 33;
System.out.println(NUM);
}
}
I was using AIDE app in Android... it compiled successfully and printed 33.
If you can do this, it is a bug in the AIDE app. You should report it to the developers. A JLS compliant implementation of Java does not allow reassignment of final variables (like this).
If you want to give them a JLS specification reference to support your bug report:
A variable can be declared final. A final variable may only be assigned to once. It is a compile-time error if a final variable is assigned to unless it is definitely unassigned immediately prior to the assignment (§16 (Definite Assignment)).