Добавление объектов монет в объекты кошелька ⇐ JAVA

[Anonymous]

I want to create a program where you're able to add and remove coins to a wallet, as well as show the total amount of money in the wallet. All through OOP. I've created a while loop where there are multiple options the user can choose from. Which is add coins, display num of coins, and remove coins from wallet.

What I am struggling with is how to keep track of these coins, for example: if I add a dime 2 times and a quarter 3 times, I want the program to count those times + the values and add it into the wallet, calculating the total.

Main class

import java.text.DecimalFormat; import java.util.Scanner; class Main { public static void main(String[] args) { Coin myCoin = new Coin(); Wallet myWallet = new Wallet(); while(true) { Scanner input = new Scanner(System.in); // Options System.out.println("Select an option: "); System.out.println("1. Enter a coin to add"); System.out.println("2. Display number of coins"); System.out.println("3. Remove Coins from Wallet"); System.out.println("4. Exit Program"); int choice = input.nextInt(); // If statements for 1 if (choice == 1) { System.out.println("Enter the coin name: "); String coin = input.next(); if (coin.equals("Dime")) { myCoin.setName("Dime"); System.out.println(myCoin.getName()); } else if (coin.equals("Quarter")) { myCoin.setName("Quarter"); System.out.println(myCoin.getName()); } else if (coin.equals("Nickel")) { myCoin.setName("Nickel"); System.out.println(myCoin.getName()); } else if (coin.equals("Loonie")) { myCoin.setName("Loonie"); System.out.println(myCoin.getName()); } else if (coin.equals("Toonie")) { myCoin.setName("Toonie"); System.out.println(myCoin.getName()); } } // If statements for 2 if (choice == 2) { System.out.println("Coins in your wallet: "); System.out.println("Toonies: " + myWallet.getToonies()); System.out.println("Loonies: " + myWallet.getLoonie()); System.out.println("Quarters: " + myWallet.getQuarter()); System.out.println("Dimes: " + myWallet.getDimes()); System.out.println("Nickels: " + myWallet.getNickel()); System.out.println("Total Money: $" + new DecimalFormat("#0.00").format(myWallet.totalCoins())); } // If statements for 3 if (choice == 3) { System.out.println("Enter coin to remove: "); String removeCoin = input.next(); System.out.println("Enter the amount of coins: "); String amountRemoved = input.next(); } // If statements for 4 if (choice == 4) { System.exit(0); } } } } Coin Class

import java.text.DecimalFormat; class Coin { private String name; private double value; public void setName(String name) { this.name = name; //dime if (name.equals("Dime")) { this.value = 0.1; } //quarter if (name.equals("Quarter")) { this.value = 0.25; } //nickel if (name.equals("Nickel")) { this.value = 0.05; } //loonie if (name.equals("Loonie")) { this.value = 1.0; } //toonie if (name.equals("Toonie")) { this.value = 2.0; } } public String getName() { return "You added a " + this.name + ". Value is $" + new DecimalFormat("#0.00").format(this.value); } } Wallet Class

import java.util.ArrayList; class Wallet { private int toonies; private int loonie; private int quarter; private int dimes; private int nickel; // array list private ArrayList coins = new ArrayList(); //setters public void setToonies(int toonies) { this.toonies = toonies; } public void setLoonie(int loonie) { this.loonie = loonie; } public void setQuarter(int quarter) { this.quarter = quarter; } public void setDimes(int dimes) { this.dimes = dimes; } public void setNickel(int nickel) { this.nickel = nickel; } //getters public int getToonies() { return toonies; } public int getLoonie() { return loonie; } public int getQuarter() { return quarter; } public int getDimes() { return dimes; } public int getNickel() { return nickel; } // total number of coins public int totalCoins() { return toonies + loonie + quarter + dimes + nickel; } } I've tried using increments to count the different coins in the Coin class but they would not work out for me and I'm trying to use an ArrayList because I'm pretty sure I need that to store the coins, but I am not well-versed in this kind of code so I am confused on how to go about this.

Also, I am not sure if the explanation of my problem is coherent or not, so feel free to ask for clarification on anything I have said


Источник: https://stackoverflow.com/questions/780 ... et-objects