LunchOrder

The goal of this is to:

Create an object which supports the Comparable, Serializable, and Cloneable interfaces.

Be able to sort an ArrayList of objects implementing the Comparable interface.

Be able to clone LunchOrder objects and to understand the difference between a reference copy and a full copy.

Explore how to save and restore Objects to/from a file.

Create and use multiple Iterators.

ArrayList

Modify the ArrayList class in staticArray:

implement Iterable

private Iterator class

implement Serializable

add clear() : set all elements to null and reset the next field.

implement a sort() method

selection sort (Sorting method will fall later in the semester)

LunchOrder

Create a LunchOrder class with the following fields:

String name

int orderNumber

int number of burgers

int number of fries

int number of sodas

Date created; reference to a java.util.Date object.

static int nextOrderNumber

static int comparisonMethod

In addition, define constants for the cost of a burger (2.75), fries (.75), and soda (1.50).

Note: all fields should be defined as private or protected unless there is a good reason to do otherwise.

The LunchOrder will implement the following interfaces: Comparable, Cloneable, and Serializable.

We will be able to support sorting LunchOrders based on 3 different criteria: order number, customers name, and cost of the order. To do so, the LunchOrder will need the following constants to support different ways to compare LunchOrders:

based on ID

based on customers name

based on the cost of an order

LunchOrder methods

double computeOrderCost(): you will be passed two doubles for the tax and tip rates. Compute the cost based on the Cost per item, the number of items, the tax and tip based on the subtotal.

int compareTo(): LunchOrder objects will be compared based on the comparison indicator (ID, name, cost of order). This method is defined in the Comparable interface.

clone(): copy of item using the Objects clone method and then make of a copy of the Date object reference by the dateCreated field. This method is defined in the Cloneable interface.

toString(): display the name, id, number of items, order cost, and the date Created field.

a static method to display the header for the toString() method.

accessors where needed.

Restaurant application.

Modify Restaurant.java, this is the application code.

Complete the following test methods:

testIterators(): create 2 Iterators. Display the first 3 orders of the 1^st iterator, then display all the orders of the 2^nd iterator, and then display the rest of the elements with the 1^st iterators. This is to show the independence of each iterator.

testCloneMethod(): first implement the LunchOrders clone method to just call the Objects clone method. After cloning a specific object, verify when you modify the Date field (using getTime() and setTime()), it changes both the original and cloned objects. Then modify the LunchOrders clone method so that it creates a new Date object with the same value of the original order. Verify when you modify the clones Date field, it does not change the original objects Date field.

In addition, you will modify code within the mainMenu() to:

save and restore all LunchOrder objects to a file called lunchOrder.dat

save and restore the ArrayList of LunchOrder objects to a filed called arrayLunchOrderObjects.dat.

Display of Application:

Menu

1 ..create new Array of LunchOrders

2 ..add 10 entries to the Array of LunchOrders

3 ..display array

4 ..sort on order#

5 ..sort on customer

6 ..sort on cost

7 ..save individual objects to a file

8 ..restore individual objects from a from file

9 ..save ArrayList object to a file

10 ..restore ArrayList object from a from file

11 ..test clone

12 ..test iterators

20 ..exit

1

Menu

1 ..create new Array of LunchOrders

2 ..add 10 entries to the Array of LunchOrders

3 ..display array

4 ..sort on order#

5 ..sort on customer

6 ..sort on cost

7 ..save individual objects to a file

8 ..restore individual objects from a from file

9 ..save ArrayList object to a file

10 ..restore ArrayList object from a from file

11 ..test clone

12 ..test iterators

20 ..exit

3

NOTE: We created 10 LunchOrders after we created the array. Each element is displayed via a call to the toString() method. The static method, getHdr() returns the corresponding header for the display.

customer order# #Burgs #Fries #Sodas cost

Jordan 100 9 7 9 52.20 Fri Oct 14 22:45:56 EDT 2016

Porter 101 1 5 2 11.40 Fri Oct 14 22:45:56 EDT 2016

Xung 102 5 6 0 21.90 Fri Oct 14 22:45:56 EDT 2016

Zeaoma 103 3 9 0 18.00 Fri Oct 14 22:45:56 EDT 2016

McDougal 104 7 2 1 26.70 Fri Oct 14 22:45:56 EDT 2016

Powell 105 4 1 7 26.70 Fri Oct 14 22:45:56 EDT 2016

Hayes 106 5 6 0 21.90 Fri Oct 14 22:45:56 EDT 2016

Xung 107 1 7 3 15.00 Fri Oct 14 22:45:56 EDT 2016

McDougal 108 3 2 2 15.30 Fri Oct 14 22:45:56 EDT 2016

McDougal 109 1 9 0 11.40 Fri Oct 14 22:45:56 EDT 2016

Menu

1 ..create new Array of LunchOrders

2 ..add 10 entries to the Array of LunchOrders

3 ..display array

4 ..sort on order#

5 ..sort on customer

6 ..sort on cost

7 ..save individual objects to a file

8 ..restore individual objects from a from file

9 ..save ArrayList object to a file

10 ..restore ArrayList object from a from file

11 ..test clone

12 ..test iterators

20 ..exit

5

Note: The LunchOrders static method, setCompareOrder(1), is called to compare orders based on the cutomers name.

customer order# #Burgs #Fries #Sodas cost

Hayes 106 5 6 0 21.90 Fri Oct 14 22:45:56 EDT 2016

Jordan 100 9 7 9 52.20 Fri Oct 14 22:45:56 EDT 2016

McDougal 104 7 2 1 26.70 Fri Oct 14 22:45:56 EDT 2016

McDougal 108 3 2 2 15.30 Fri Oct 14 22:45:56 EDT 2016

McDougal 109 1 9 0 11.40 Fri Oct 14 22:45:56 EDT 2016

Porter 101 1 5 2 11.40 Fri Oct 14 22:45:56 EDT 2016

Powell 105 4 1 7 26.70 Fri Oct 14 22:45:56 EDT 2016

Xung 102 5 6 0 21.90 Fri Oct 14 22:45:56 EDT 2016

Xung 107 1 7 3 15.00 Fri Oct 14 22:45:56 EDT 2016

Zeaoma 103 3 9 0 18.00 Fri Oct 14 22:45:56 EDT 2016

Menu

1 ..create new Array of LunchOrders

2 ..add 10 entries to the Array of LunchOrders

3 ..display array

4 ..sort on order#

5 ..sort on customer

6 ..sort on cost

7 ..save individual objects to a file

8 ..restore individual objects from a from file

9 ..save ArrayList object to a file

10 ..restore ArrayList object from a from file

11 ..test clone

12 ..test iterators

20 ..exit

6

Note: The LunchOrders static method, setCompareOrder(1), is called to compare orders based on the customers order cost.

customer order# #Burgs #Fries #Sodas cost

McDougal 109 1 9 0 11.40 Fri Oct 14 22:45:56 EDT 2016

Porter 101 1 5 2 11.40 Fri Oct 14 22:45:56 EDT 2016

Xung 107 1 7 3 15.00 Fri Oct 14 22:45:56 EDT 2016

McDougal 108 3 2 2 15.30 Fri Oct 14 22:45:56 EDT 2016

Zeaoma 103 3 9 0 18.00 Fri Oct 14 22:45:56 EDT 2016

Hayes 106 5 6 0 21.90 Fri Oct 14 22:45:56 EDT 2016

Xung 102 5 6 0 21.90 Fri Oct 14 22:45:56 EDT 2016

McDougal 104 7 2 1 26.70 Fri Oct 14 22:45:56 EDT 2016

Powell 105 4 1 7 26.70 Fri Oct 14 22:45:56 EDT 2016

Jordan 100 9 7 9 52.20 Fri Oct 14 22:45:56 EDT 2016

Menu

1 ..create new Array of LunchOrders

2 ..add 10 entries to the Array of LunchOrders

3 ..display array

4 ..sort on order#

5 ..sort on customer

6 ..sort on cost

7 ..save individual objects to a file

8 ..restore individual objects from a from file

9 ..save ArrayList object to a file

10 ..restore ArrayList object from a from file

11 ..test clone

12 ..test iterators

20 ..exit

4

Note: The LunchOrders static method, setCompareOrder(1), is called to compare orders based on the customers order number.

customer order# #Burgs #Fries #Sodas cost

Jordan 100 9 7 9 52.20 Fri Oct 14 22:45:56 EDT 2016

Porter 101 1 5 2 11.40 Fri Oct 14 22:45:56 EDT 2016

Xung 102 5 6 0 21.90 Fri Oct 14 22:45:56 EDT 2016

Zeaoma 103 3 9 0 18.00 Fri Oct 14 22:45:56 EDT 2016

McDougal 104 7 2 1 26.70 Fri Oct 14 22:45:56 EDT 2016

Powell 105 4 1 7 26.70 Fri Oct 14 22:45:56 EDT 2016

Hayes 106 5 6 0 21.90 Fri Oct 14 22:45:56 EDT 2016

Xung 107 1 7 3 15.00 Fri Oct 14 22:45:56 EDT 2016

McDougal 108 3 2 2 15.30 Fri Oct 14 22:45:56 EDT 2016

McDougal 109 1 9 0 11.40 Fri Oct 14 22:45:56 EDT 2016

Menu

1 ..create new Array of LunchOrders

2 ..add 10 entries to the Array of LunchOrders

3 ..display array

4 ..sort on order#

5 ..sort on customer

6 ..sort on cost

7 ..save individual objects to a file

8 ..restore individual objects from a from file

9 ..save ArrayList object to a file

10 ..restore ArrayList object from a from file

11 ..test clone

12 ..test iterators

20 ..exit

7

Note: All LunchOrders are saved via an enhanced for loop to a file named lunchOrder.dat.

Menu

1 ..create new Array of LunchOrders

2 ..add 10 entries to the Array of LunchOrders

3 ..display array

4 ..sort on order#

5 ..sort on customer

6 ..sort on cost

7 ..save individual objects to a file

8 ..restore individual objects from a from file

9 ..save ArrayList object to a file

10 ..restore ArrayList object from a from file

11 ..test clone

12 ..test iterators

20 ..exit

2

Note: additional entries are added to the ArrayList we want to modify the Array list before restoring it to the original contents we saved to a file.

Menu

1 ..create new Array of LunchOrders

2 ..add 10 entries to the Array of LunchOrders

3 ..display array

4 ..sort on order#

5 ..sort on customer

6 ..sort on cost

7 ..save individual objects to a file

8 ..restore individual objects from a from file

9 ..save ArrayList object to a file

10 ..restore ArrayList object from a from file

11 ..test clone

12 ..test iterators

20 ..exit

5

Note: ArrayList is sorted based on customers name

customer order# #Burgs #Fries #Sodas cost

Albertson 118 8 3 3 34.50 Fri Oct 14 22:47:35 EDT 2016

Brady 112 8 3 7 41.70 Fri Oct 14 22:47:35 EDT 2016

Grevey 113 7 2 0 24.90 Fri Oct 14 22:47:35 EDT 2016

Hayes 106 5 6 0 21.90 Fri Oct 14 22:45:56 EDT 2016

Hayes 110 8 2 6 39.00 Fri Oct 14 22:47:35 EDT 2016

Hayes 117 9 7 4 43.20 Fri Oct 14 22:47:35 EDT 2016

Jones 114 1 7 5 18.60 Fri Oct 14 22:47:35 EDT 2016

Jones 115 5 7 9 39.00 Fri Oct 14 22:47:35 EDT 2016

Jordan 100 9 7 9 52.20 Fri Oct 14 22:45:56 EDT 2016

McDonald 119 2 8 3 19.20 Fri Oct 14 22:47:35 EDT 2016

McDougal 104 7 2 1 26.70 Fri Oct 14 22:45:56 EDT 2016

McDougal 108 3 2 2 15.30 Fri Oct 14 22:45:56 EDT 2016

McDougal 109 1 9 0 11.40 Fri Oct 14 22:45:56 EDT 2016

Porter 101 1 5 2 11.40 Fri Oct 14 22:45:56 EDT 2016

Powell 105 4 1 7 26.70 Fri Oct 14 22:45:56 EDT 2016

Smith 116 8 1 7 39.90 Fri Oct 14 22:47:35 EDT 2016

Walton 111 7 8 9 46.50 Fri Oct 14 22:47:35 EDT 2016

Xung 102 5 6 0 21.90 Fri Oct 14 22:45:56 EDT 2016

Xung 107 1 7 3 15.00 Fri Oct 14 22:45:56 EDT 2016

Zeaoma 103 3 9 0 18.00 Fri Oct 14 22:45:56 EDT 2016

Menu

1 ..create new Array of LunchOrders

2 ..add 10 entries to the Array of LunchOrders

3 ..display array

4 ..sort on order#

5 ..sort on customer

6 ..sort on cost

7 ..save individual objects to a file

8 ..restore individual objects from a from file

9 ..save ArrayList object to a file

10 ..restore ArrayList object from a from file

11 ..test clone

12 ..test iterators

20 ..exit

8

ArrayList is restored from a file, therefore we go back to the original 10 items we saved in the order that they were in (based on order number).

Note: you need to repeat the save/restore saving the ArrayList as an object. 1 call to writeObject, as opposed to 10 calls above.

Menu

1 ..create new Array of LunchOrders

2 ..add 10 entries to the Array of LunchOrders

3 ..display array

4 ..sort on order#

5 ..sort on customer

6 ..sort on cost

7 ..save individual objects to a file

8 ..restore individual objects from a from file

9 ..save ArrayList object to a file

10 ..restore ArrayList object from a from file

11 ..test clone

12 ..test iterators

20 ..exit

3

customer order# #Burgs #Fries #Sodas cost

Jordan 100 9 7 9 52.20 Fri Oct 14 22:45:56 EDT 2016

Porter 101 1 5 2 11.40 Fri Oct 14 22:45:56 EDT 2016

Xung 102 5 6 0 21.90 Fri Oct 14 22:45:56 EDT 2016

Zeaoma 103 3 9 0 18.00 Fri Oct 14 22:45:56 EDT 2016

McDougal 104 7 2 1 26.70 Fri Oct 14 22:45:56 EDT 2016

Powell 105 4 1 7 26.70 Fri Oct 14 22:45:56 EDT 2016

Hayes 106 5 6 0 21.90 Fri Oct 14 22:45:56 EDT 2016

Xung 107 1 7 3 15.00 Fri Oct 14 22:45:56 EDT 2016

McDougal 108 3 2 2 15.30 Fri Oct 14 22:45:56 EDT 2016

McDougal 109 1 9 0 11.40 Fri Oct 14 22:45:56 EDT 2016

Menu

1 ..create new Array of LunchOrders

2 ..add 10 entries to the Array of LunchOrders

3 ..display array

4 ..sort on order#

5 ..sort on customer

6 ..sort on cost

7 ..save individual objects to a file

8 ..restore individual objects from a from file

9 ..save ArrayList object to a file

10 ..restore ArrayList object from a from file

11 ..test clone

12 ..test iterators

20 ..exit

11

Note: The 1^st element of the ArrayList is cloned and displayed. Then modify the clone method so that a new Date object is created in the clone method. When the cloned objects dateCreated object is modified, the original objects field is not modified.

get(0) clone: Jordan 100 9 7 9 52.20 Fri Oct 14 22:45:56 EDT 2016

get(0) order1: Jordan 100 9 7 9 52.20 Fri Oct 14 22:45:56 EDT 2016

get(0) order2: Jordan 100 9 7 9 52.20 Thu Oct 13 22:45:56 EDT 2016

Menu

1 ..create new Array of LunchOrders

2 ..add 10 entries to the Array of LunchOrders

3 ..display array

4 ..sort on order#

5 ..sort on customer

6 ..sort on cost

7 ..save individual objects to a file

8 ..restore individual objects from a from file

9 ..save ArrayList object to a file

10 ..restore ArrayList object from a from file

11 ..test clone

12 ..test iterators

20 ..exit

12

Note: 2 Iterators are created. We display the first 3 elements of the first Iterator, then we display all items of the 2^nd iterator, and finally, we display the rest of the elements of the 1^st iterator. The Iterators are independent of each other.

Jordan 100 9 7 9 52.20 Fri Oct 14 22:45:56 EDT 2016

Porter 101 1 5 2 11.40 Fri Oct 14 22:45:56 EDT 2016

Xung 102 5 6 0 21.90 Fri Oct 14 22:45:56 EDT 2016

-------------------

Jordan 100 9 7 9 52.20 Fri Oct 14 22:45:56 EDT 2016

Porter 101 1 5 2 11.40 Fri Oct 14 22:45:56 EDT 2016

Zeaoma 103 3 9 0 18.00 Fri Oct 14 22:45:56 EDT 2016

McDougal 104 7 2 1 26.70 Fri Oct 14 22:45:56 EDT 2016

Powell 105 4 1 7 26.70 Fri Oct 14 22:45:56 EDT 2016

Hayes 106 5 6 0 21.90 Fri Oct 14 22:45:56 EDT 2016

Xung 107 1 7 3 15.00 Fri Oct 14 22:45:56 EDT 2016

McDougal 108 3 2 2 15.30 Fri Oct 14 22:45:56 EDT 2016

McDougal 109 1 9 0 11.40 Fri Oct 14 22:45:56 EDT 2016

-------------------

Zeaoma 103 3 9 0 18.00 Fri Oct 14 22:45:56 EDT 2016

McDougal 104 7 2 1 26.70 Fri Oct 14 22:45:56 EDT 2016

Powell 105 4 1 7 26.70 Fri Oct 14 22:45:56 EDT 2016

Hayes 106 5 6 0 21.90 Fri Oct 14 22:45:56 EDT 2016

Xung 107 1 7 3 15.00 Fri Oct 14 22:45:56 EDT 2016

McDougal 108 3 2 2 15.30 Fri Oct 14 22:45:56 EDT 2016

McDougal 109 1 9 0 11.40 Fri Oct 14 22:45:56 EDT 2016

Menu

1 ..create new Array of LunchOrders

2 ..add 10 entries to the Array of LunchOrders

3 ..display array

4 ..sort on order#

5 ..sort on customer

6 ..sort on cost

7 ..save individual objects to a file

8 ..restore individual objects from a from file

9 ..save ArrayList object to a file

10 ..restore ArrayList object from a from file

11 ..test clone

12 ..test iterators

20 ..exit

20

LunchOrder.java

import java.io.Serializable; import java.util.Date; public class LunchOrder implements Comparable, Cloneable, Serializable { static final double COST_BURGERS = 2.75; static final double COST_FRIES = .75; static final double COST_SODAS = 1.50; private int numBurgers; private int numFries; private int numSodas; private String customer; private int orderNum; private Date dateCreated; static int nextOrderNum = 100; //3 ways to sort LunchOrders: by orderNum, customer, and cost private static int sortOrder = 0; static final int SORT_ID = 0; static final int SORT_CUSTOMER = 1; static final int SORT_COST = 2; public LunchOrder(String customer, int numBurgers, int numFries, int numSodas) { super(); this.customer = customer; this.numBurgers = numBurgers; this.numFries = numFries; this.numSodas = numSodas; orderNum = nextOrderNum++; dateCreated = new Date(); } public int compareTo(Object order) { //todo } public static void setCompareOrder( int num ) { sortOrder = num; } public Object clone() throws CloneNotSupportedException { //todo } public double computeOrderCost( double tax, double tip) { double subtotal = numBurgers * COST_BURGERS + numFries * COST_FRIES + numSodas * COST_SODAS; double orderTip = subtotal * tip; double orderTax = subtotal * tax; return subtotal + orderTip + orderTax; } public Date getDateCreated() { return dateCreated; } public static String getHdr() { String str = String.format(" %10s %6s %6s %6s %6s %6s", "customer", "order#", "#Burgs", "#Fries", "#Sodas", "cost"); return str; } public String toString() { String str = String.format(" %10s %6d %6d %6d %6d %6.2f %s", customer, orderNum, numBurgers, numFries, numSodas, computeOrderCost(.05, .15), dateCreated); return str; } }

Restaurant.java

import staticArray.ArrayList; import java.util.Date; import java.util.Scanner; import java.io.*; public class Restaurant { static String [] names = {"Jones", "Smith", "Brady", "Albertson", "McDougal", "McDonald", "Adams", "Billington", "Grevey", "Hayes", "Porter", "Walton", "Woods", "Jordan", "Powell", "Zeaoma", "Xung" }; static ArrayList myOrders = new ArrayList(); static final String FILENAME = "lunchOrders.dat"; static final String FILENAME2 = "alllunchOrders.dat"; /* * create two Iterators * verify the work independently * => create iterator #1 * display half of the objects using next() * => create iterator #2 * display all the objects using next() * => display the 2nd half of iterator #1 objects using next() */ public static void testIterators() { // TODO: } public static void mainMenu() { Scanner input = new Scanner(System.in); while(true) { System.out.println("Menu"); System.out.println(" 1 ..create new Array of LunchOrders"); System.out.println(" 2 ..add 10 entries to the Array of LunchOrders"); System.out.println(" 3 ..display array"); System.out.println(" 4 ..sort on order#"); System.out.println(" 5 ..sort on customer"); System.out.println(" 6 ..sort on cost"); System.out.println(" 7 ..save individual objects to a file"); System.out.println(" 8 ..restore individual objects from a from file"); System.out.println(" 9 ..save ArrayList object to a file"); System.out.println("10 ..restore ArrayList object from a from file"); System.out.println("11 ..test clone"); System.out.println("12 ..test iterators"); System.out.println("20 ..exit"); int choice=input.nextInt(); if (choice == 1 || choice == 2) { if (choice == 1) myOrders = new ArrayList(); for (int k=0; k<10; k++) { String name = names[ (int)(Math.random() * names.length)]; int numBurgers = (int) (Math.random() * 10 + 1); int numFries = (int) (Math.random() * 10 ); int numSodas = (int) (Math.random() * 10 ); LunchOrder order = new LunchOrder(name, numBurgers, numFries, numSodas); myOrders.add(order); } } else if (choice == 3) { displayOrders(); } else if (choice == 4) { LunchOrder.setCompareOrder(0); myOrders.sort(); displayOrders(); } else if (choice == 5) { LunchOrder.setCompareOrder(1); myOrders.sort(); displayOrders(); } else if (choice == 6) { LunchOrder.setCompareOrder(2); myOrders.sort(); displayOrders(); } else if (choice == 7) { try{ ObjectOutputStream out = new ObjectOutputStream( new FileOutputStream(FILENAME)); /* * TO DO: traverse the ArrayList and save each LunchOrder object to the file */ out.close(); } catch (Exception e) { System.out.println("error opening file: " + e); } } else if (choice == 8) { try{ FileInputStream fileStream = new FileInputStream(FILENAME); ObjectInputStream in = new ObjectInputStream( fileStream); myOrders.clear(); /* * TO DO: restore the ArrayList of LunchOrder objects from the file * note: use fileStream.available() to determine if another object * can be read from the file. */ System.out.println("in.avail: " + fileStream.available()); in.close(); } catch (Exception e) { System.out.println("error opening file: " + e); } } else if (choice == 9) { try{ /* * TO DO: write the entire ArrayList to the file * note, this can be done with 1 write. */ } catch (Exception e) { System.out.println("error opening file: " + e); } } else if (choice == 10) { try{ /* * TO DO: restore the entire ArrayList from the file * note, this can be done with 1 read. */ } catch (Exception e) { System.out.println("error opening file: " + e); } } else if (choice == 11) { try{ /* * TODO: test your LunchOrder's clone method */ } catch(Exception e) { System.out.println("error with clone: " + e); } } else if (choice == 12) { testIterators(); } else if (choice == 20) { System.exit(0); } } } public static void main(String[] args) { mainMenu(); } public static void displayOrders() { System.out.println(LunchOrder.getHdr()); for (LunchOrder ord : myOrders) System.out.println(ord); } }