Not able to understand the output. requesting to explain

Question

public class MyClass {
public static void main(String args[]) {
Integer x = 127;
Integer y = 127;

System.out.println (x==y);

x=128;
y=128;

System.out.println(x==y);
}
}

Output
True
False

Please explain why 2nd output is false

Answer 1

It is because the Integer class maintains an internal cache which doesn't require the instantiation of an object to store values which are frequently used from range -128 to 127 which is 1 byte.

For all the values greater than that it creates separate objects. And hence the == will return false.

https://code.sololearn.com/cn2vMn0Uyr74/?ref=app

Answer 2

type of int is primitive while Integer is of class type

Answer 3

Thank you so much for response. Really helped

Answer 4

Use int x & int y
Happy coding ;))