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Update-ProductInventory.java #1

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150 changes: 90 additions & 60 deletions Classes/ProductInventory.java
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Original file line number Diff line number Diff line change
Expand Up @@ -4,75 +4,105 @@
* price, id, and quantity on hand. Then create an inventory class
* which keeps track of various products and can sum up the inventory
* value.
*
*
* @author RomanGotsiy ([email protected])
*/

import java.util.*;
import java.io.FileWriter;
import java.io.IOException;

class Product {
public double price;
private int id;
private int quantity;
public Product(int id, double price, int quantity){
this.price = price;
this.id = id;
this.quantity = quantity;
}
public void incQuantity(int qnt) {
this.quantity +=qnt;
}
public void decQuantity(int qnt) {
this.quantity = Math.max(this.quantity-qnt, 0);
}
public int getQuantity(){
return this.quantity;
}
public String toString(){
return String.format("%d\t%.2f\t%d",id,price,quantity);
}
public double price;
private String name;
private int quantity;

public Product(String name, double price, int quantity){
this.price = price;
this.name = name;
this.quantity = quantity;
}

public void incQuantity(int qnt) {
this.quantity +=qnt;
}

public void decQuantity(int qnt) {
this.quantity = Math.max(this.quantity-qnt, 0);
}

public int getQuantity(){
return this.quantity;
}

public String toString(){
return String.format("%s\t%.2f\t%d",name,price,quantity);
}
}

class Inventory {
private List<Product> products;

public Inventory(){
products = new ArrayList<Product>();
}

public void addProduct(Product p){
products.add(p);
}

public void printInventory(){
double sum = 0;
for(Product p : products){
System.out.println(p.toString());
sum+=p.price*p.getQuantity();
}
System.out.println("Average is: " + sum);
}
private List<Product> products;

public Inventory(){
products = new ArrayList<Product>();
}

public void addProduct(Product p){
products.add(p);
}

public void printInventory(){
double sum = 0;
for(Product p : products){
System.out.println(p.toString());
sum+=p.price*p.getQuantity();
}
System.out.println("Average is: " + sum);
}
public void saveInventoryToFile() {
try {
FileWriter writer = new FileWriter("inventory.txt");
for (Product p : products) {
writer.write(p.toString() + "\n");
}
writer.close();
System.out.println("Inventory saved to inventory.txt");
} catch (IOException e) {
System.out.println("An error occurred while saving the inventory to file: " + e.getMessage());
}
}
}

public class ProductInventory{
public static void main(String args[]) {
Product p1 = new Product(1, 12.60, 4);
Product p2 = new Product(2, 23, 2);
Product p3 = new Product(3, 9.99, 2);

Inventory inv = new Inventory();
inv.addProduct(p1);
inv.addProduct(p2);
inv.addProduct(p3);

p1.decQuantity(1);
p2.incQuantity(2);

inv.printInventory();
}
import java.util.Scanner;

public class ProductInventory {
public static void main(String args[]) {
Scanner scanner = new Scanner(System.in);
Inventory inv = new Inventory();


while (true) {
System.out.print("Enter product name(or type 'quit' to end): ");
String input = scanner.nextLine();
if (input.equals("quit")) {
break;
}
String name = input;

System.out.print("Enter product price: ");
double price = Double.parseDouble(scanner.nextLine());

System.out.print("Enter product quantity: ");
int quantity = Integer.parseInt(scanner.nextLine());

Product product = new Product(name, price, quantity);
inv.addProduct(product);
}

inv.printInventory();
inv.saveInventoryToFile();
scanner.close();
}
}