A good answer might be:

One of the variables of the object keeps a reference to that object's message.

Improved Class

Here is what we have so far for HelloObject: 

class HelloObject                                  
{                                                  
  void speak()                                     
  { 
    System.out.println("Hello from an object!");
  }
}

Here is a start on improving HelloObject: 

class HelloObject                                  
{                                                  

  __________  _____________ ;   // keep the object's message here

  void speak()                                     
  { 
    System.out.println(  _________________  );   // print the object's message
  }
}

QUESTION 16:

Modify the definition of HelloObject to include a String reference variable. Modify the speak() method so that it uses that variable.