Rujul_Java_CAT1

package temp;

import java.util.*;

public class RujulCAT {

    public static void main(String[] args) {
        ArrayList<Invoice> invoices = new ArrayList<Invoice>();

        // Adding three invoices
        invoices.add(new Invoice("Part 1", "Desc 1", 12, 5.0));
        invoices.add(new Invoice("Part 2", "Desc 2", -1, 10.0));
        invoices.add(new Invoice("Part 3", "Desc 3", 20, -9.0));

        // Printing invoice amount
        for(Invoice i : invoices) {
            System.out.println("\nPart number: " + i.getPartNum() + "\nDescription: " + i.getDesc() + "\nQuantity:" + i.getQuantity() + "\nPrice Per item: " + i.getPricePerItem());
            System.out.println("Invoice Amount:" + i.getInvoiceAmount());
        }

    }

}

class Invoice{
    String partNum;
    String desc;
    int quantity;
    double pricePerItem;

    public Invoice(String partNum, String desc, int q, double p) {
        setPartNum(partNum);
        setDesc(desc);
        setQuantity(q);
        setPricePerItem(p);
    }

    public void setPartNum(String partNum) {
        this.partNum = partNum;
    }

    public void setDesc(String desc) {
        this.desc = desc;
    }

    public void setQuantity(int quantity) {
        if (quantity < 0) {
            this.quantity = 0;
        }
        else {
            this.quantity = quantity;
        }

    }

    public void setPricePerItem(double pricePerItem) {
        if (pricePerItem < 0) {
            this.pricePerItem = 0.0;
        }
        else {
            this.pricePerItem = pricePerItem;
        }
    }

    public String getPartNum() {
        return partNum;
    }

    public String getDesc() {
        return desc;
    }

    public int getQuantity() {
        return quantity;
    }

    public double getPricePerItem() {
        return pricePerItem;
    }

    public double getInvoiceAmount() {
        return quantity*pricePerItem;
    }
}