Answer to Question #188473 in Java | JSP | JSF for Qaasim

Question

Create a class called with your Reg No, as Invoice18Arid876, 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 a part number (type String), a part description (type String),a quantity of the item being purchased (type int) and a price per item (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 named getInvoice Amount 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 test application named InvoiceTestYourName that demonstrates class Invoice’s capabilities.

Answer 1

public class Invoice18Arid876 {
	private String partNumber;
	private String partDescription;
	private int quantity;
	private double pricePerItem;
	
	
	public Invoice18Arid876() {}
	
	public Invoice18Arid876(String partNumber,String partDescription,int quantity,double pricePerItem) {
		this.partNumber=partNumber;
		this.partDescription=partDescription;
		this.quantity=quantity;
		this.pricePerItem=pricePerItem;
	}
	
	/**
	 * A method named getInvoice Amount 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.
	 * @return
	 */
	public double  getInvoiceAmount() {
		if(this.quantity<0) {
			this.quantity=0;
		}
		if(this.pricePerItem<0) {
			this.pricePerItem=0;
		}
		return this.quantity*this.pricePerItem;
	} 
	
	/**
	 * @return the partNumber
	 */
	public String getPartNumber() {
		return partNumber;
	}
	/**
	 * @param partNumber the partNumber to set
	 */
	public void setPartNumber(String partNumber) {
		this.partNumber = partNumber;
	}
	/**
	 * @return the partDescription
	 */
	public String getPartDescription() {
		return partDescription;
	}
	/**
	 * @param partDescription the partDescription to set
	 */
	public void setPartDescription(String partDescription) {
		this.partDescription = partDescription;
	}
	/**
	 * @return the quantity
	 */
	public int getQuantity() {
		return quantity;
	}
	/**
	 * @param quantity the quantity to set
	 */
	public void setQuantity(int quantity) {
		this.quantity = quantity;
	}
	/**
	 * @return the pricePerItem
	 */
	public double getPricePerItem() {
		return pricePerItem;
	}
	/**
	 * @param pricePerItem the pricePerItem to set
	 */
	public void setPricePerItem(double pricePerItem) {
		this.pricePerItem = pricePerItem;
	}
	
}

import java.util.Scanner;


public class InvoiceTestYourName {
	


	/**
	 * The start point of the program
	 * 
	 * @param args
	 */
	public static void main(String[] args) {
	
		// Create Scanner object
		Scanner keyboard = new Scanner(System.in);
		try {
			// Get the size of array
			System.out.print("Enter number: ");
			String partNumber=keyboard.nextLine();
			System.out.print("Enter description: ");
			String partDescription=keyboard.nextLine();
			System.out.print("Enter quantity: ");
			int quantity=keyboard.nextInt();
			System.out.print("Enter price per item: ");
			double pricePerItem=keyboard.nextDouble();
				
			
			Invoice18Arid876 invoice18Arid876=new Invoice18Arid876(partNumber,partDescription,quantity,pricePerItem);
			System.out.println("The number: "+partNumber);
			System.out.println("The description: "+partDescription);
			System.out.println("The quantity: "+quantity);
			System.out.println("The price per item: "+pricePerItem);
			System.out.println("The invoice amount: "+invoice18Arid876.getInvoiceAmount());
		
		} catch (Exception e) {
			// Display error message
			System.out.println(e.getMessage());
		}
		// close Scanner
		keyboard.close();
	}


}