Create a class called Invoice that a hardware store might use to represent an in

ID: 3542305 • Letter: C

Question

Create a class called Invoice that a hardware store might use to represent an invoice for an item sold at the store. An Invoice should include four pieces of information as instance variables (fields) - a part number (type String), a part description (type String), a quantity of the item being purchased (type int), and a price per item (type double).
Your class should have a constructor that initializes the four instance variables. Provide a set and a get method for each instance variable. In addition, provide a method name getInvoiceAmount that calculates the invoice amount (i.e., multiplies the quantity by the price per item), then returns the amount as a double value. If the quantity is not positive, it should be set to 0. If the price per item is not positive, it should be set to 0.0. Write a tst application named InvoiceTest that demonstrates class Invoice's capabilities.

Explanation / Answer

class Invoice
{
     private String part_no;
    private String part_desc;
    private int item;
    private double price;
    public Invoice()
    {
    part_no = "";
    part_desc = "";
    item = 0;
    price = 0.0;
    }
    public Invoice(String p_n,String p_d,int i,double p)
    {
    part_no = p_n;
    part_desc = p_d;
    item = i;
    price = p;
    }
    public void set_part_no(String p_n)
    {
    part_no = p_n;
    }
    public void set_part_desc(String p_d)
    {
    part_desc = p_d;
    }
    public void set_item(int i)
    {
    item = i;
    }
    public void set_pprice(double p)
    {
    price = p;
    }
    public String get_part_no()
    {
    return part_no;
    }
    public String set_part_desc()
    {
    return part_desc;
    }
    public int set_item()
    {
    return item;
    }
    public double set_pprice()
    {
    return price;
    }
    public double getInvoiceAmount()
    {
    if(item>0 && price>0.0)
    return price*item;
    return 0.0;
    }
}

public class InvoiceTest
{
     public static void main(String[] args)
    {
    Invoice inv1 = new Invoice("123","Tyre",12,45);
    System.out.println("Invoice amount given by " + inv1.getInvoiceAmount());
    }
}

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Create a class called Invoice that a hardware store might use to represent an in

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Create a class called Invoice that a hardware store might use to represent an in

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