public class Main {
  public static void main(String[] args) {
    Integer boxed = 42;    // autoboxing: int 42 becomes Integer
    int unboxed = boxed;   // unboxing: Integer becomes int

    System.out.println(boxed + unboxed); // 84

    // Wrapper methods that a plain int does not have
    System.out.println(Integer.parseInt("100") + 1); // 101
    System.out.println(Integer.MAX_VALUE);           // 2147483647
  }
}