Android How to Program, 3/e

F.14 Wrap-Up

In this appendix, we presented additional class concepts. The Time class case study presented a complete class declaration consisting of private data, overloaded public constructors for initialization flexibility, set and get methods for manipulating the class’s data, and methods that returned String representations of a Time object in two different formats. You also learned that every class can declare a toString method that returns a String representation of an object of the class and that method toString can be called implicitly whenever an object of a class appears in the code where a String is expected.

You learned that the this reference is used implicitly in a class’s non-static methods to access the class’s instance variables ...