Why “final static int” can be used as a switch's case constant but not “final static ”

Question

Why is this int switch valid:

public class Foo {
    private final static int ONE = 1;
    private final static int TWO = 2;

    public static void main(String         


        

Answer 1

Because a case statement label must have either a compile time constant or an EnumConstantName. JLS 14.11

Compile time constants can only be strings and primitive types, as described by JLS 15.28. Thus you can not use a static final , as it is neither a compile time constant, nor the name of an enum.