Java static final values replaced in code when compiling?

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Yes, the Java compiler does replace static constant values like SIZE in your example with their literal values.

So, if you would later change SIZE in class A but you don’t recompile class b, you will still see the old value in class b. You can easily test this out:

file A.java

public class A {
    public static final int VALUE = 200;
}

file B.java

public class B {
    public static void main(String[] args) {
        System.out.println(A.VALUE);
    }
}

Compile A.java and B.java. Now run: java B

Change the value in A.java. Recompile A.java, but not B.java. Run again, and you’ll see the old value being printed.

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