Declaring variables using Java wrapper classes

Question

In Java, we can use the wrapper classes for declaring a variables. For example

    Integer x=5;

This means that there is a reference 'x' that points to a value of 5.

Then I declared another reference called y that points to the same value

    Integer y=x;  //now y should point to the number "5"

then I changed the value which y points to

     y=20;

Doesn't this make both x and y point to 20 ? because when I print x , I still get 5

Answer 1

The following:

y=20;

rebinds y to point to a different Integer object.

It does not touch x, so its value does not change.