Question

So I got to a site where it says Integers don’t allow Calculate with it, + – * / % ^ etc.

But I tried

Integer n=new Integer(8);
    n+=2;
    Integer m=new Integer(10);
    System.out.println(n+m);

and it prints out 20. So I am a little confused. I know this is a noob question but I really want to get this and I don’t know what I am missing. So what does this actually mean “integers don’t allow calculate with it”

Thanks.

EDIT: @people request :Site providing accurate information?

Answer 1

Java 1.5+ automatically boxes (and unboxes) primitive types – it’s called autoboxing.

• http://docs.oracle.com/javase/1.5.0/docs/guide/language/autoboxing.html

The site you encountered may have talked about Java prior 1.5:

In code prior to Java version [1.4, edited], you had to do a lot of manual tedious converting back and forth from primitive int to Integer Object, and similarly for byte/ Byte, char/Character, short/ Short, long/ Long, float/ Float and double/ Double. (http://mindprod.com/jgloss/autoboxing.html)