A boxing operation followed by a widening operation in order to match an invocation to a method. : Boxing Unboxing « Utility Classes « SCJP

1. SCJP
2. Utility Classes
3. Boxing Unboxing

public class MainClass{
  static void go(Object o) {
    Byte b2 = (Byte) o;       // ok - it's a Byte object
    System.out.println(b2);
  }

  public static void main(String [] args) {
    byte b = 5;
    go(b);       // can this byte turn into an Object ?
  }
}

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