Why doesn't anyone under Level 15 wand to accept my java challenges?😂😂 How am I supposed to level up without any challengers?

Question

if you within 2 levels of me and want to challenge Java, let's go

Answer 1

I am High level but not in Java, if you want

Answer 2

Integer is the class while int is the raw type.
== on raw types compare their values
on objects, it compares their references and as both object have the same value but different reference, it is false
for example :
Integer n = new Integer(100);
Integer b = n; // b == n should be true

Answer 3

holy crap you wrecked me

Answer 4

can you explain number 1?