Java™ How To Program (Early Objects), Tenth Edition

3.7 Wrap-Up

In this chapter, you learned how to create your own classes and methods, create objects of those classes and call methods of those objects to perform useful actions. You declared instance variables of a class to maintain data for each object of the class, and you declared your own methods to operate on that data. You learned how to call a method to tell it to perform its task and how to pass information to a method as arguments whose values are assigned to the method’s parameters. You learned the difference between a local variable of a method and an instance variable of a class, and that only instance variables are initialized automatically. You also learned how to use a class’s constructor to specify the initial values for an object’s ...