Question

I need to make a project named CStore.
It is a Java starter project that only uses the console.
I don't know how to even start it..
Please help me asap

First I need to define 3 classes names Goods, Manage, UI.
Then simply implement the Goods class, then make a function that inserts Goods object into a Goods list in the Manage class.
In the UI class, the user inputs Goods that will be registered and that Goods will be inputed in the Goods List in the Manage class.

First screen will say 1. user 2. manager
If you choose 2, which is the manager, the next ouput is
1. input
2. output
3. end program
When you enter 1, you should enter new Goods info (details below) (the product number(ID) should be automatically given)
WHen you enter 2, it ouputs every item you just registered.
If you wnat you could use try~~catch in this UI part.

The Goods class whould have the following data member and member funtion.
-larger group name (ex. juice-> orange juice, lemonade, juice is the larger group name and lemonade if the product name)
-product name
-price
-product number(ID) (that should be automatically given when registered)
-remaining stock
+add stock
+remove stock

There should be an array in the Mangage class that contains Goods objects,
and there should be a member function that manages this array.

It would mean alot if someone could help me..

Answer 1

Goods.java

public class Goods {
private int productId;
private String productName;
private double productPrice;
  
public Goods()
{
this.productId = 0;
this.productName = "";
this.productPrice = 0;
}

public Goods(String productName, double productPrice)
{
this.productId = (int)(Math.random() * 100) + 10; // generates random number between 10 & 100
this.productName = productName;
this.productPrice = productPrice;
}

public int getProductId() {
return productId;
}

public String getProductName() {
return productName;
}

public double getProductPrice() {
return productPrice;
}
  
@Override
public String toString()
{
return("Id: " + getProductId() + ", Name: " + getProductName()
+ ", Price: $" + String.format("%.2f", getProductPrice()));
}
}

Manage.java

import java.util.ArrayList;

public class Manage {
private ArrayList<Goods> goodsList;
  
public Manage()
{
this.goodsList = new ArrayList<>();
}
  
public Manage(ArrayList<Goods> goodsList)
{
this.goodsList = goodsList;
}

public ArrayList<Goods> getGoodsList()
{
return goodsList;
}
  
public void addStock(Goods good)
{
this.goodsList.add(good);
System.out.println("\n" + good.getProductName() + " added successfully!");
}
  
public void removeStock(int id)
{
boolean found = false;
int index = 0;
for(int i = 0; i < this.goodsList.size(); i++)
{
if(this.goodsList.get(i).getProductId() == id)
{
found = true;
index = i;
break;
}
}
if(!found)
System.out.println("\nNo product with product id " + id + " was found!");
else
{
System.out.println("\nProduct " + this.goodsList.get(index).getProductName() + " was removed successfully!");
this.goodsList.remove(index);
}
}
}

UI.java (Main class)

import java.util.ArrayList;
import java.util.Scanner;

public class UI {
  
public static void main(String[]args)
{
Scanner sc = new Scanner(System.in);
int choice1 = 0, choice2 = 0;
ArrayList<Goods> goodsList = new ArrayList<>();
  
goodsList.add(new Goods("Juice", 14.56));
goodsList.add(new Goods("Lemonade", 11.50));
goodsList.add(new Goods("Sandwich", 31.00));
goodsList.add(new Goods("Pizza", 50.00));
goodsList.add(new Goods("Cold Drink", 24.20));
  
Manage manage = new Manage(goodsList);
  
do
{
printMainMenu();
choice1 = sc.nextInt();
switch(choice1)
{
case 1:
System.out.println("\n*** ALL GOODS ***\n-----------------");
for(Goods goods : manage.getGoodsList())
{
System.out.println(goods.toString());
}
System.out.println();
break;
  
case 2:
do
{
System.out.println();
printSubMenu();
choice2 = sc.nextInt();
sc.nextLine();
switch(choice2)
{
case 1:
System.out.print("\nEnter product name: ");
String name = sc.nextLine().trim();
System.out.print("Enter product price: $");
double price = sc.nextDouble();
manage.addStock(new Goods(name, price));
System.out.println();
break;
  
case 2:
System.out.println("\n*** ALL GOODS ***\n-----------------");
for(Goods goods : manage.getGoodsList())
{
System.out.println(goods.toString());
}
System.out.println();
break;
  
case 3:
System.out.println("\nGood bye!\n");
System.exit(0);
}
}while(choice2 != 3);
break;
  
case 3:
System.out.println("\nGood bye!\n");
System.exit(0);
}
}while(choice1 != 2);
  
}
  
public static void printMainMenu()
{
System.out.print("1. User\n2. Manager\n3. End program\nChoose user type: ");
}
  
public static void printSubMenu()
{
System.out.print("1. Input\n2. Output\n3. End program\nEnter your choice: ");
}
}

************************************************************************* SCREENSHOT **************************************************