3. Create another Java class called Customer within the same project Programming
ID: 3853143 • Letter: 3
Question
3. Create another Java class called Customer within the same project ProgrammingAssignment3 and include the main method. Part A: Include the following Java classes to the above created Java file. Define al the instance variables with private access modifier and constructors, instance methods with public access modifier Item class: This class has following instance variables, constructor and instance methods itemName String unitPrice: double numberOfUnits : int Instance Variable:s Constructor Default constructor Get and set methods for itemName, unitPrice and numberOfUnits Instance Methods variables. itemTotal: Find the total price (unitPrice numberOfUnits) for that particular item and return it.Explanation / Answer
Item.java
public class Item {
//Declaring instance variables
private String itemName;
private Double unitPrice;
private int numberOfUnits;
//Zero argumented constructor
public Item() {
super();
}
//getters and setters
public String getItemName() {
return itemName;
}
public void setItemName(String itemName) {
this.itemName = itemName;
}
public Double getUnitPrice() {
return unitPrice;
}
public void setUnitPrice(Double unitPrice) {
this.unitPrice = unitPrice;
}
public int getNumberOfUnits() {
return numberOfUnits;
}
public void setNumberOfUnits(int numberOfUnits) {
this.numberOfUnits = numberOfUnits;
}
//Method which calculates the ItemTotal
public double itemTotal()
{
return unitPrice*numberOfUnits;
}
}
___________________
Order.java
import java.util.Random;
public class Order {
//Declaring instance variables
private int orderId;
private String customerName;
private Item it1=new Item();
private Item it2=new Item();
private Item it3=new Item();
//Declaring static variable
static int nextOrderID=1000;
//Zero argumented constructor
Order()
{
//Creating a random Class object
Random r = new Random();
nextOrderID+=(r.nextInt(10) + 1);
this.orderId=nextOrderID;
}
//getters and setters
public int getOrderId() {
return orderId;
}
public void setOrderId(int orderId) {
this.orderId = orderId;
}
public String getCustomerName() {
return customerName;
}
public void setCustomerName(String customerName) {
this.customerName = customerName;
}
public Item getIt1() {
return it1;
}
public Item getIt2() {
return it2;
}
public Item getIt3() {
return it3;
}
public void setIt1(String name,double unitPrice,int noOfUnits)
{
it1.setItemName(name);
it1.setUnitPrice(unitPrice);
it1.setNumberOfUnits(noOfUnits);
}
public void setIt2(String name,double unitPrice,int noOfUnits)
{
it2.setItemName(name);
it2.setUnitPrice(unitPrice);
it2.setNumberOfUnits(noOfUnits);
}
public void setIt3(String name,double unitPrice,int noOfUnits)
{
it3.setItemName(name);
it3.setUnitPrice(unitPrice);
it3.setNumberOfUnits(noOfUnits);
}
//Method which displays the Order Details
public void displayOrderDetails()
{
System.out.println("Order #: "+orderId);
System.out.println("Customer :"+customerName);
System.out.println();
System.out.println("Item Unit Price #units Item Total");
System.out.println(getIt1().getItemName()+" "+getIt1().getUnitPrice()+" "+getIt1().getNumberOfUnits()+" "+getIt1().itemTotal());
System.out.println(getIt2().getItemName()+" "+getIt2().getUnitPrice()+" "+getIt2().getNumberOfUnits()+" "+getIt2().itemTotal());
System.out.println(getIt3().getItemName()+" "+getIt3().getUnitPrice()+" "+getIt3().getNumberOfUnits()+" "+getIt3().itemTotal());
}
//Method which displays order Total
public double displayOrderTotal()
{
return getIt1().itemTotal()+getIt2().itemTotal()+getIt3().itemTotal();
}
//Static Method which displays next order number
public static void displayNextOrderNumber()
{
System.out.println("Next Order Number :"+new Order().nextOrderID);
}
}
_____________________
Test.java
public class Test {
public static void main(String[] args) {
//Creating variables of type Order class
Order ord1,ord2,ord3;
//Creating Order class objects
ord1=new Order();
ord2=new Order();
ord3=new Order();
//Calling the setter methods on the Order#1 by passing the inputs
ord1.setCustomerName("Harry Potter");
ord1.setIt1("book", 3.5, 5);
ord1.setIt2("pen", 1.5, 3);
ord1.setIt3("ink", 7.5, 1);
//Calling the setter methods on the Order#2 by passing the inputs
ord2.setCustomerName("Hermione Granger");
ord2.setIt1("book", 4.5, 7);
ord2.setIt2("ink", 7.5, 1);
ord2.setIt3("paper", 0.02, 500);
//Calling the setter methods on the Order#3 by passing the inputs
ord3.setCustomerName("Ron Weasley");
ord3.setIt1("wand", 15.75, 1);
ord3.setIt2("book", 3.5, 3);
ord3.setIt3("pencil", 1.5, 4);
//Displaying the order details of Order#1
ord1.displayOrderDetails();
ord1.displayOrderTotal();
System.out.println("***************************");
//Displaying the order details of Order#2
ord2.displayOrderDetails();
ord2.displayOrderTotal();
System.out.println("***************************");
//Displaying the order details of Order#3
ord3.displayOrderDetails();
ord3.displayOrderTotal();
System.out.println("***************************");
Order.displayNextOrderNumber();
}
}
_______________________
Output:
Order #: 1008
Customer :Harry Potter
Item Unit Price #units Item Total
book 3.5 5 17.5
pen 1.5 3 4.5
ink 7.5 1 7.5
***************************
Order #: 1011
Customer :Hermione Granger
Item Unit Price #units Item Total
book 4.5 7 31.5
ink 7.5 1 7.5
paper 0.02 500 10.0
***************************
Order #: 1015
Customer :Ron Weasley
Item Unit Price #units Item Total
wand 15.75 1 15.75
book 3.5 3 10.5
pencil 1.5 4 6.0
***************************
Next Order Number :1021
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