Inheritance - Java Concepts - page 671

CLASSES, OBJECTS, AND METHODS INTRODUCED IN THIS
CHAPTER

java.awt.Component
setPreferredSize
java.awt.Dimension
java.lang.Cloneable
java.lang.CloneNotSupportedException
java.lang.Object
clone
toString
javax.swing.JTextArea
append
javax.swing.JTextField
javax.swing.text.JTextComponent
getText
isEditable
setEditable
setText

REVIEW EXERCISES

΢ Exercise R10.1. What is the balance of b after the following operations?

SavingsAccount b = new SavingsAccount(10);
b.deposit(5000);
b.withdraw(b.getBalance() / 2);
b.addInterest();

΢ Exercise R10.2. Describe all constructors of the SavingsAccount
class. List all methods that are inherited from the BankAccount class.
List all methods that are added to the SavingsAccount class.

΢΢Exercise R10.3. Can you convert a superclass reference into a subclass
reference? A subclass reference into a superclass reference? If so, give
examples. If not, explain why not.

489
490

΢΢Exercise R10.4. Identify the superclass and the subclass in each of the
following pairs of classes.

a. Employee, Manager