Use the following tester class to figure out how to make your own CashRegister.java class file.

CashRegisterTest.java

/**
   A class to test the CashRegister class.
*/
public class CashRegisterTester
{
   public static void main(String[] args)
   {
      CashRegister register = new CashRegister();
      register.recordPurchase(29.50);
      register.recordPurchase(9.25);
      register.enterPayment(50);
      double change = register.giveChange();
      System.out.println(change);      
      System.out.println("Expected: 11.25");          
   }
}

SongTester.java

import java.util.Scanner;
 
 
public class SongTester {
 
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		Song song=new Song();
		Scanner keyboard=new Scanner(System.in);
		String input="";
		while (input.indexOf("q")<0)
		{
			processCommand(keyboard, song, input);
			System.out.println("\nCurrently: "+song+"\n");
			System.out.print("Command (Title, Artist, Rank, Time, Plays, Quit): ");
			input=keyboard.nextLine();
			input=input.toLowerCase();
 
		}
		System.out.println("\nThanks.. we exit with the song being:\n"+song);
 
 
	}
	public static void processCommand(Scanner keyboard, Song song, String input){
		if (input.equals("title"))
		{
			System.out.print("Currently: "+song.getTitle()+"\nNew Title: ");
			song.setTitle(keyboard.nextLine());
		}
		else if (input.equals("artist"))
		{
				System.out.print("Currently: "+song.getArtist()+"\nNew artist name: ");
				song.setArtist(keyboard.nextLine());
		}
		else if (input.equals("rank"))
		{
			System.out.print("Currently: "+song.getRank()+"\nNew rank: ");
			int newRank=Integer.parseInt(keyboard.nextLine());
			song.setRank(newRank);				
		}
		else if (input.equals("time"))
		{
			System.out.print("Currently: "+song.getTime()+"\nNew time: ");
			double newTime=Double.parseDouble(keyboard.nextLine());
			song.setTime(newTime);				
		}
		else if (input.equals("plays"))
		{
			System.out.print("Currently: "+song.getPlayCount()+"\nNew number of plays: ");
			int newPlays=Integer.parseInt(keyboard.nextLine());
			song.setPlayCount(newPlays);				
		}
 
	}
}