Inheritance - Java Concepts - page 605

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S YNTAX 10.1 Inheritance

class SubclassName extends SuperclassName

{
methods
instance fields
}

Example:

public class SavingsAccount extends BankAccount

{
public SavingsAccount(double rate)
{
interestRate = rate;
}
public void addInterest()
{
double interest = getBalance() *
interestRate / 100;
deposit(interest);
}
private double interestRate;
}

Purpose:

To define a new class that inherits from an existing class, and define the methods
and instance fields that are added in the new class

public class SavingsAccount extends BankAccount
{
public SavingsAccount(double rate)
{
interestRate = rate;
}
public void addInterest()
{
double interest = getBalance() * interestRate
/ 100;
deposit(interest);