I need a Java program that handles the order list for if I were an online retailer. The program should contain a minimum of three classes:
Order Class
Display Class
Main Class
The Order Class that uses a queue to hold the orders in the order they were taken, and the queue should contain the customer's last name, order number, and order total cost. The Display Class needs to store a copy of the order queue in two arrays. Each array will contain the order list, but one will be sorted by name and the other sorted by order number. When an order is taken and stored in the Order Class the program will update the Display Class arrays automatically and sort them in descending order using quick sort and outputs the contents to the console upon each entry of new data.
There should be a Main Class that will handle operator data input and when an order is added or removed, the program will update the Order Class and Display Class. The end-user should be presented with a menu to add an order, remove an order and display the order list from the queue.
Answers
Using the knowledge in computational language in JAVA it is possible to write a code that handles the order list for if I were an online retailer.
Writting the code:import java.lang.*;
import java.util.*;
class Fruit{
private String fruit_name;
private double tot_weights;
private double price;
public const static String fruit_nvalue="?";
public const static double def_value=0.0;
public Fruit(){
fruit_name=fruit_nvalue;
tot_weights=price=def_value;
}
public Fruit(String fruit_name,double tot_weights,double price){
this.fruit_name=fruit_name;
this.tot_weights=tot_weights;
this.price=price;
}
public double order(double order_weights){
if(order_weights>tot_weights){
return double(-1);
}
else{
tot_weights=tot_weights - order_weights;
return order_weights*price;
}
}
public Boolean equals(String fruit1,double wei1,double price1,String fruit2,double wei2,double price2){
if(((fruit1.equals(fruit2)) &&(wei1==wei2) && (price1==price2))== true ){
return true
}
}
public String toString(){
return fruit_name+" "+tot_weights+" "+price;
}
}
class OnlineSuperMarket{
private Fruit[] fruit_objects;
private String store_name;
private String web_address;
public const static float tax_rate = 0.095;
public const static int size=10;
public const static sn="TBD";
public const static wa="www.unknown.com";
Scanner scan=new Scanner(System.in);
public OnlineSuperMarket(){
fruit_objects=new Fruit[size];
store_name = sn;
web_address = wa;
}
public OnlineSuperMarket(String store_name,String web_address){
this.store_name=store_name;
this.web_address=web_address;
fruit_objects=new Fruit[size];
}
public void init(){
String fruit_names[];
double weights[];
double prices[];
for(int i=0;i<fruit_objects.length;i++){
fruit_objects[i]=new Fruit(scan.next(),scan.nextDouble(),scan.nextDouble());
}
}
public void sort(){
Arrays.sort(fruit_objects);
}
public void run(){
while(true){
System.out.println(" Enter a fruit name or Q (or q) to end:");
String choice= scan.next();
if(choice = "Q" || choice = "q"){
quit();
}
else{
if(find(choice)){
System.out.println("Enter weight in lbs:");
double weight=new nextDouble();
double price = order(weight);
if(price == double(-1)){
System.out.println("quantity not available");
}
else{
total_cost = price+tax_rate;
System.out.println("You ordered");
System.out.println("Fruit: "+choice);
System.out.println("Weight: "+weight+" lbs");
System.out.println("Price: "+price+"/lbs");
System.out.println("Total cost (plus tax): $"+total_cost);
}
}
else{
System.out.println(choice+" not available");
}
}
}
}
public void showFruits(){
for(Fruit obj:fruit_objects){
System.out.println(obj.toString());
}
}
public void quit(){
showFruits();
System.out.println("Thanks for your visit. Please come again!");
System.exit();
}
public Boolean find(Strign fruit_name){
sort();
int first=0;
int last = fruit_objects.length;
int mid = (first + last)/2;
while( first <= last ){
if (fruit_objects[mid] < fruit_name ){
first = mid + 1;
}else if ( fruit_objects[mid].equals(fruit_name) ){
return true;
break;
}else{
last = mid - 1;
}
mid = (first + last)/2;
}
if ( first > last ){
return false;
}
}
}
public class Design{
public static void main(String[] args) {
OnlineSuperMarket osm=null;
osm = new OnlineSuperMarket(store_name, web_address);
init();
showFruits();
sort();
showFruits();
}
}
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