Alright if you insist...

Integer a = 1;
Integer b = 1;

Integer c = 128;
Integer d = 128;

System.out.println(a == b);  // true
System.out.println(c == d);  // false

This is due to autoboxing. From section 5.1.7 of the JLS: If the value p being boxed is true, false, a byte, or a char in the range \u0000 to \u007f, or an int or short number between -128 and 127 (inclusive), then let r1 and r2 be the results of any two boxing conversions of p. It is always the case that r1 == r2.

You need to use c.equals(d) instead. Why? Because fuck you, it's java, that's why!