Introducing Classes, Objects, and Methods - Java: A Beginner's Guide - page 178

can gain access to the hidden instance variable by referring to it through this . For example,
the following is a syntactically valid way to write the Pwr( ) constructor.
In this version, the names of the parameters are the same as the names of the instance vari-
ables, thus hiding them. However, this is used to “uncover” the instance variables.
Chapter 4 Self Test
1 . What is the difference between a class and an object?
2 . How is a class defined?
3 . What does each object have its own copy of?
4 . Using two separate statements, show how to declare an object called counter of a
class called MyCounter .
5 . Show how a method called myMeth( ) is declared if it has a return type of double
and has two int parameters called a and b .
6 . How must a method return if it returns a value?
7 . What name does a constructor have?
8 . What does new do?
9 . What is garbage collection, and how does it work? What is finalize( ) ?
10 . What is this ?
11 . Can a constructor have one or more parameters?
12 . If a method returns no value, what must its return type be?