HelloObject type has
    a speak() method.Method definitions look like this:
returnType methodName( parameterList )
{
  // Java statements
  return returnValue;
}
The returnType is the type of value that the method hands back
to the caller of the method.
Your methods can return values 
just as do methods from library classes.
The return statement 
is used by a method to hand back a value to
the caller.
If you want a method that does something, but does not return a value to the caller, use a return type of void and do not use a return value with the return statement. The return statement can be omitted; the method will automatically return to the caller after it executes. Here is the method from the example program:
  // method definition
  void speak()
  {
    System.out.println("Hello from an object!");
  }