// An error produced by manual unboxing. 
class UnboxingError {  
  public static void main(String args[]) {  
      
    Integer iOb = 1000; // autobox the value 1000 
  
    int i = iOb.byteValue(); // manually unbox as byte !!! 
  
    System.out.println(i);  // does not display 1000 ! 
  }  
}