Comparing Integer objects vs int

Question

I fixed an endless loop by changing Integer to int in the following:

public class IntTest {
    public static void main(String[] args) {
        Integer x=-1         


        

Answer 1

Integer is an Object, and objects are compared with .equals(..)

Only primitives are compared with ==

That's the rule, apart from some exceptional cases, where == can be used for comparing objects. But even then it is not advisable.