Java-Boxing and un-boxing

class Boxing {
    public static void main(String[] args) {
        Integer integer = 10; /*boxing*/
        /*boxing of primitive type 10 [int] into class type integer [class Integer]. From jdk 1.5 onwards.
        Assigning an int to Integer was not possible in earlier version of jdk.*/
        int j = integer + 10; /*un-boxing*/
        System.out.println(integer);
        System.out.println(j);
    }
}