I am doing excercises in a book called "Java, how to program". I have created a small program with 2 classes. The program is supposed to be used by a hardware store to represent an invoice for items sold. It is supposed to includ 4 pieces of information: A string value for the items number, a string value which describes the product, an int value for the quantity of items sold, and a double value for the items price. I have created 2 objects of the class in a class which contains the main method. I am supposed to use "set and get-methods" for each instance variables.
The problem is that when the programs prompts the user to write the values of the variables, it doesn´t read the first value for the variable "second items number" (Line 5 in the copy of the command window under). I really can´t read in the code why this happens. Can anyone please help me?
The code of the two classes are as follows:
public class aInvoice
{
private String number;
private String description;
private int quantity;
private double price;
public aInvoice(String pNumber, String pDescription, int pQuantity, double pPrice)
{
number = pNumber;
description = pDescription;
if (pQuantity < 0)
{quantity = 0;}
else
{quantity = pQuantity;}
if (pPrice < 0)
{price = 0;}
else
{price = pPrice;}
}
public String getNumber()
{
return number;
}
public String getDescription()
{
return description;
}
public int getQuantity()
{
return quantity;
}
public double getPrice()
{
return price;
}
double totalAmount;
public double getaInvoiceTotalAmount()
{
return quantity * price;
}
}
and:
import java.util.Scanner;
public class aInvoiceTest
{
public static void main(String[]args)
{
String partNumber1 = null;
String partDescription1 = null;
int partQuantity1 = 0;
double partPrice1 = 0.0;
String partNumber2 = null;
String partDescription2 = null;
int partQuantity2 = 0;
double partPrice2 = 0.0;
Scanner input = new Scanner (System.in);
System.out.print( "Enter first items number: ");
partNumber1 = input.nextLine();
System.out.print( "Enter description: ");
partDescription1 = input.nextLine();
System.out.print( "Enter quantity: ");
partQuantity1 = input.nextInt();
System.out.print( "Enter price: $");
partPrice1 = input.nextDouble();
System.out.print( "Enter second items number: ");
partNumber2 = input.nextLine();
System.out.print( "Enter description: ");
partDescription2 = input.nextLine();
System.out.print( "Enter quantity: ");
partQuantity2 = input.nextInt();
System.out.print( "Enter price: $");
partPrice2 = input.nextDouble();
aInvoice aInvoice1 = new aInvoice(partNumber1, partDescription1, partQuantity1, partPrice1);
aInvoice aInvoice2 = new aInvoice(partNumber2, partDescription2, partQuantity2, partPrice2);
System.out.printf( "\n\nPart 1´s item number: %s\nItem description: %s\nQuantity: %d\nPrice each: $ %.2f\n\n", aInvoice1.getNumber(), aInvoice1.getDescription(), aInvoice1.getQuantity(), aInvoice1.getPrice () );
System.out.printf( "\n\nPart 2´s item number: %s\nItem description: %s\nQuantity: %d\nPrice each: $ %.2f\n\n", aInvoice2.getNumber(), aInvoice2.getDescription(), aInvoice2.getQuantity(), aInvoice2.getPrice () );
System.out.printf( "Total amount: $ %.2f\n\n", (aInvoice1.getaInvoiceTotalAmount() + aInvoice2.getaInvoiceTotalAmount()));
}
}
THe reading in the command window is:
Enter first items number: 44 Enter description: pc Enter quantity: 1 Enter price: $10 Enter second items number: Enter description: phone Enter quantity: 1 Enter price: $100
Part 1´s item number: 44 Item description: pc Quantity: 1 Price each: $ 10.00
Part 2´s item number: Item description: phone Quantity: 1 Price each: $ 100.00
Total amount: $ 110.00
