Question

Java Project

Tasks:

Create a Coin.java class that includes the following:

            Takes in a coin name as part of the constructor and stores it in a private string

            Has a method that returns the coins name

            Has an abstract getvalue method

Create four children classes of Coin.java with the names Penny, Nickle, Dime, and Quarter that includes the following:

            A constructor that passes the coins name to the parent

            A private variable that defines the value of the coin

            A method that returns the coins name via the parent class

            And any other methods that should be required.

Create a Pocket class that includes the following:

            An ArrayList of type coin to manage coins.(You MUST use an ARRAYLIST)

            A method that allows a coin to be added

            A method that allows a coin to be removed

            A method that returns a count of the coins in your arraylist by coin type.

            A method that returns a total value of all the coins in your arraylist   

Create a NoSuchCoin class that will act as your custom exception (see pg.551 in book).

Create a PocketMain class that includes the following :

            Creates an object of type pocket to be used below

            A main method that prompts the user with a menu of options to include:

                        Add a coin (must specify type)

                        Remove a coin (must specify type)

                        Display a coin count

                        Display a total value in the pocket

                        An ability to exit the program

            This method must handle poor user input somehow using your custom exception

YOU MUST COMMENT YOUR CODE SO I KNOW WHAT IS HAPPENING!!!

Deliverables:

Pocket.java

Coin.java

Nickle.java

Penny.java

Dime.java

Quarter.java

PocketMain.Java

NoSuchCoin.java

Answer 1

Answer:-

Hello, I have written the required code in java. Please find it below. I have include all the java files code.

JAVA CODE:-

Coin.java

public abstract class Coin{
   private String name ;
   /* Constructor*/
   public Coin(String Name){
       name = Name;
   }
   public String GetName(){
       return name;
   }
/* abstract methods for getters ans setters*/
   public abstract double getValue();
   public abstract void setValue(double a);
}

Penny.java

class Penny extends Coin {

private double value;
   /* Constructor*/
   public Penny(String name){
      super(name);
   }

public double getValue(){
   return value;
}

public void setValue(double value)
{
   this.value=value;
}
}

Nickle.java

class Nickle extends Coin {

private double value;
/* Constructor*/
public Nickle(String name){
      super(name);
   }

public double getValue(){
   return value;
}
public void setValue(double value)
{
   this.value=value;
}
}

Dime.java

class Dime extends Coin {

private double value;
/* Constructor*/
   public Dime(String name){
      super(name);
   }
public double getValue(){
   return value;
}
public void setValue(double value)
{
   this.value=value;
}
}

Quarter.java

class Quarter extends Coin {

private double value;
/* COnstructor*/
   public Quarter(String name){
      super(name);
   }

public double getValue(){
   return value;
}
public void setValue(double value)
{
   this.value=value;
}
}

Pocket.java

import java.util.ArrayList; // import the ArrayList class
import java.util.*;
import java.util.stream.*;

class Pocket{
   ArrayList<Coin> coins = new ArrayList<Coin>();

/* method to add a coin*/
   public void AddCoin(Coin coin){
       this.coins.add(coin);
   }

/* method to remove a coin*/
   public void RemoveCoin(String type){
      

for(int i=0;i<this.coins.size();i++)
{
Coin listval=coins.get(i);
if(listval instanceof Penny && type=="Penny")// we are checking if the given String is of type Penny
{
  
   this.coins.remove(listval);
}
if(listval instanceof Nickle && type=="Nickle")// we are checking if the given String is of type Nickle
{
   this.coins.remove(listval);
}
if(listval instanceof Dime && type=="Dime")// we are checking if the given String is of type Dime
{

   this.coins.remove(listval);
}
if(listval instanceof Quarter && type=="Quarter")// we are checking if the given String is of type Quarter
{
  
   this.coins.remove(listval);
}
  
}
  
   }
/* method to count the number of coins of a given type*/
   public int countCoin(String type){
       int sum=0;

for(int i=0;i<this.coins.size();i++)
{
Coin listval=coins.get(i);
if(listval instanceof Penny && type=="Penny")// we are checking if the given String is of type Penny
{
sum++;
}
if(listval instanceof Nickle && type=="Nickle")// we are checking if the given String is of type Nickle
{
sum++;
}
if(listval instanceof Dime && type=="Dime")// we are checking if the given String is of type Dime
{
sum++;
}
if(listval instanceof Quarter && type=="Quarter")// we are checking if the given String is of type Quarter
{
sum++;
}
  
}
return sum;
  
   }

/* method to get the total values of coin in list*/
   public double totalValue()
   {
       double total=0;
       for(int i=0;i<this.coins.size();i++)
       {
           Coin listval = coins.get(i);
           total+=listval.getValue();
       }
       return total;

   }

}

PocketMain.java

import java.util.Scanner;

class PocketMain
{
   public static void main(String [] args)
   {
       Scanner in = new Scanner(System.in);
       Pocket pocket = new Pocket();
/* Showing a menu to User*/
       int input=0;
       do{
       System.out.println("Press 1 to Add a coin");
       System.out.println("Press 2 to Remove a coin");
       System.out.println("Press 3 to Display a coin count");
       System.out.println("Press 4 to Display a total value in the pocket");
       System.out.println("Press 5 to Exit");
/*Taking input from User*/
   input = in.nextInt();
/* if User enters 1, then we will add a coin in list*/
if(input == 1){

System.out.println("Press 1 to add a Penny");
       System.out.println("Press 2 to add Nickle");
       System.out.println("Press 3 to add Dime");
       System.out.println("Press 4 to add Quarter");
       int addInput = 0;
addInput = in.nextInt();
if(addInput == 1){
Coin p = new Penny("myPenny");
p.setValue(10);
pocket.AddCoin(p);
}
if(addInput == 2){
Coin p = new Nickle("myNickle");
p.setValue(20);
pocket.AddCoin(p);
}
if(addInput == 3){
Coin p = new Dime("myDime");
p.setValue(30);
pocket.AddCoin(p);
}
if(addInput == 4){
Coin p = new Quarter("myQuarter");
p.setValue(40);
pocket.AddCoin(p);
}

}
/* if User enters 2, then we will remove a coin in list*/
if(input == 2){

System.out.println("Press 1 to remove a Penny");
       System.out.println("Press 2 to remove Nickle");
       System.out.println("Press 3 to remove Dime");
       System.out.println("Press 4 to remove Quarter");
       int removeInput = 0;
removeInput = in.nextInt();
if(removeInput == 1){
pocket.RemoveCoin("Penny");
}
if(removeInput == 2){
pocket.RemoveCoin("Nickle");
}
if(removeInput == 3){
pocket.RemoveCoin("Dime");
}
if(removeInput == 4){
pocket.RemoveCoin("Quarter");
}

}
/* if User enters 3, then we will display the number of coins of selected type*/
if(input == 3){

System.out.println("Press 1 for Penny coin count");
       System.out.println("Press 2 for Nickle coin count");
       System.out.println("Press 3 for Dime coin count");
       System.out.println("Press 4 for Quarter coin count");
      
int removeInput = in.nextInt();
if(removeInput == 1){
System.out.println("Number of coins of type Penny is "+pocket.countCoin("Penny"));
}
if(removeInput == 2){
System.out.println("Number of coins of type Nickle is "+pocket.countCoin("Nickle"));
}
if(removeInput == 3){
System.out.println("Number of coins of type Dime is "+pocket.countCoin("Dime"));
}
if(removeInput == 4){
System.out.println("Number of coins of type Quarter is "+pocket.countCoin("Quarter"));
}

}
/* if User enters 4, then we will display the total values of coin in list*/
if(input==4)
{
   System.out.println("Total value of coins in list is "+pocket.totalValue() );
}
if(input>5)
{
   System.out.println("Invalid input, Please try again");
}

} while (input!=5);

   
   }
}

Screenchots of code:-

Please refer to the screenshots of the code for properly understanding the indentation of the code.

Coin.java

Penny.java

Nickle.java

Dime.java

Quarter.java

Pocket.java

screenshot 1:-

screenshot 2:-

screenshot 3:-

screenshot 4:-

PocketMain.java

screenshot 1:-

screenshot 2:-

screenshot 3:-

screenshot 4:-

OUTPUT:-

I hope, it would help.

Thanks!