String s1 == String s2 (true) but FieldOffset is different

Question

As I am studying java, I have learned that the proper way to compare 2 Strings is to use equals and not \"==\". This line

static String s1 = \"a\";
static String s2          


        

Answer 1

String declared in Java code are automatically interned.

So the result is the same as you would call String.intern() manually.

    String a = "aa";
    String b = new String(a);
    System.out.println("aa" == "aa");
    System.out.println(a == b);
    System.out.println(a.equals(b));
    System.out.println(a.intern() == b.intern());

output:

true

false

true

true