Arrays and Array Lists - Java Concepts - page 450

public void addAccount(int accountNumber,
double initialBalance)
public void deposit(int accountNumber, double
amount)
public void withdraw(int accountNumber,
double amount)
public double getBalance(int accountNumber)

΢ Exercise P7.2. Implement a class Purse . A purse contains a collection of
coins. For simplicity, we will only store the coin names in an
ArrayList<String> . (We will discuss a better representation in
Chapter 8 .) Supply a method

void addCoin(String coinName)

Add a method toString to the Purse class that prints the coins in the
purse in the format

Purse[Quarter,Dime,Nickel,Dime]

΢ Exercise P7.3. Write a method reverse that reverses the sequence of coins
in a purse. Use the toString method of the preceding assignment to test
your code. For example, if reverse is called with a purse

Purse[Quarter,Dime,Nickel,Dime]

then the purse is changed to

Purse[Dime,Nickel,Dime,Quarter]

΢ Exercise P7.4. Add a method to the Purse class

public void transfer(Purse other)

that transfers the contents of one purse to another. For example, if a is

Purse[Quarter,Dime,Nickel,Dime]

327
328

and b is