Using Overloaded Constructors

• Overloaded methods must have different parameter lists.

  (How else could the compiler determine which method you wanted it to use?)

• In the accompanying Time class, we have constructors when:
  • no arguments are supplied
  • 1 argument is supplied
  • 2 argument are supplied
  • 3 argument are supplied

  It is impossible for a user to construct an invalid Time.

• Since setTime is invoked from all the constructor methods, if we change the body of setTime, the constructors needn't be changed.

  If we put the code for setTime in the body of each of the constructors, and then had to change the implementation of "setTime", then all the constructors would need to be updated.

  Factoring out common code into methods reduces the complexity of upgrading the software.