wrapper classes - (auto)boxing & (auto)unboxing

bxUbx.java

public static void main(String[] args) {
        int i = 10;
        Integer ii = new Integer(i);    //  boxing - putting primitive type in wrapper classes
        Integer iii = i;                //  auto-boxing - putting primitive type in wrapper classes

        int j = ii.intValue();  //  unboxing - getting primitive type from wrapper classes
        int jj = iii;           //  auto-unboxing - gettingg primitive types from wrapper classes

        System.out.println(i);
        System.out.println(ii);
        System.out.println(iii);
        System.out.println(j);
        System.out.println(jj);
}