Second Major Assignment due February 16th

The following two programs comes from Chapter 7 in your textbook. Due Monday February 16th, 2009. Please upload both as one project and make sure to zip it before using FTP. 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. (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] Use the following class in your solution: import java.util.ArrayList; /** A purse holds a collection of coins. */ public class Purse { /** Constructs an empty purse. */ public Purse() { coins = new ArrayList(); } /** Adds a coin to the purse. @param coinName the coin to add */ public void addCoin(String coinName) { . . . } /** Returns a string describing the object. @return a string in the format "Purse[coinName1,coinName2,...]" */ public String toString() { . . . } private ArrayList coins; } Use the following class as your tester class: /** This class tests the Purse class. */ public class PurseTester { public static void main(String[] args) { Purse p = new Purse(); p.addCoin("Quarter"); p.addCoin("Dime"); p.addCoin("Nickel"); p.addCoin("Dime"); System.out.println(p.toString()); System.out.println("Expected: Purse[Quarter,Dime,Nickel,Dime]"); } }

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] Use the following class in your solution: import java.util.ArrayList; /** A purse holds a collection of coins. */ public class Purse { /** Constructs an empty purse. */ public Purse() { coins = new ArrayList(); } /** Adds a coin to the purse. @param coinName the coin to add */ public void addCoin(String coinName) { . . . } /** Returns a string describing the object. @return a string in the format "Purse[coinName1,coinName2,...]" */ public String toString() { . . . } /** Reverses the elements in the purse. */ public void reverse() { . . . } private ArrayList coins; } Use the following class as your tester class: /** This class tests the Purse class. */ public class PurseTester { public static void main(String[] args) { Purse p = new Purse(); p.addCoin("Quarter"); p.addCoin("Dime"); p.addCoin("Nickel"); p.addCoin("Dime"); System.out.println("Original purse: " + p.toString()); System.out.println("Expected: Purse[Quarter,Dime,Nickel,Dime]"); p.reverse(); System.out.println("Reversed purse: " + p.toString()); System.out.println("Expected: Purse[Dime,Nickel,Dime,Quarter]"); } }