After pillaging for a few weeks with our new cargo bay upgrade, we decide to branch out into a new sector of space to explore and hopefully find new targets. We travel to the next star system over, another low-security sector. After exploring the new star system for a few hours, we are hailed by a strange vessel. He sends us a message stating that he is a traveling merchant looking to purchase goods, and asks us if we would like to sell any extra weight we might have. We agree to sell him some items, however, we do not want to sell just anything, as some of our loot might have a better credit rate elsewhere. Unfortunately, we are unable to tell what kind of item is what, so we are unable to make the sale. On our way to the nearest space station, we think of a way to classify the items in our cargo bay. We decide that it would be best to classify the items in our hold as equipment, consumable, or material. When we arrive at the station, we create a clear hierarchy for all of our items. After fencing our loot, we decide to rest at this station for the night.
Items have attributes such as Name, Weight, Value, Durability, and ID. (Create an object called 'Item').
We now classify our items by separating them into 3 distinct categories Equipment, Consumable, or Material. (You must implement these 3 classes that are subclasses of Item and they must have at least 3 unique attributes in each subclass)
We can carry up to 10 items, as long as they don't exceed the maximum weight of the cargo bay, 25 Tons. (Use an Array that checks an item's weight before placing it in the cargo hold)
We need to be able to add and remove items by their name.
We need to be able to search for a specific type of item in our cargo bay based on the item's name and one of its attributes (Implement 2 searches - one on the name and another on any attribute you choose).
We need to be able to sort items by their names alphabetically in ascending order (Using an Insertion or Selection sort only)
We need to know how many of each item we have in our cargo bay and display their attributes.
The driver you are to use has been attached to the module.
Note: You CANNOT modify the AssignmentDriver file, you should only modify the file called StudentMethods.java and you CANNOT change the method headers. You can add other methods as you see fit, but do not modify any of the method headers I have given you. This will break the testing program I have, and will result in a lower grade on your assignment.
Use the following code as your base.
package Assignments;
import java.util.Scanner;
public class Assignment03Driver {
StudentMethods03 studentMethods = new StudentMethods03();
Scanner input = new Scanner(System.in);
public static void main(String[] args) {
new Assignment03Driver();
}
public Assignment03Driver() {
Item[] cargohold = new Item[10];
System.out.println("Welcome to the Discipulus Cargo Hold interface.");
System.out.println("Please select a number from the options below");
System.out.println("");
while (true) {
// Give the user a list of their options
System.out.println("1: Add an item to the cargo hold.");
System.out.println("2: Remove an item from the cargo hold.");
System.out.println("3: Sort the contents of the cargo hold.");
System.out.println("4: Search for an item by name.");
System.out.println("5: Search for an item by ID.");
System.out.println("6: Display the items in the cargo hold.");
System.out.println("0: Exit the Discipulus Cargo Hold interface.");
int userChoice = input.nextInt();
input.nextLine();
switch (userChoice) {
case 1:
studentMethods.addItem(cargohold);
break;
case 2:
studentMethods.removeItem(cargohold);
break;
case 3:
studentMethods.sortItems(cargohold);
break;
case 4:
studentMethods.searchItemsByName(cargohold);
break;
case 5:
studentMethods.searchItemsByID(cargohold);
break;
case 6:
studentMethods.displayItems(cargohold);
break;
case 0:
System.out.println("Thank you for using the Discipulus Cargo Hold interface. See you again soon!");
System.exit(0);
}
}
}
}
package Assignments;
import java.util.Scanner;
public class StudentMethods03 {
Item[] cargohold;
int numItems;
Scanner input = new Scanner(System.in);
public static void main(String[] args) {
new StudentMethods03();
}
public StudentMethods03() {
cargohold = new Item[10];
numItems = 0;
System.out.println("Welcome to the BlackStar Cargo Hold interface.");
System.out.println("Please select a number from the options below");
System.out.println("");
while (true) {
System.out.println("1: Add an item to the cargo hold.");
System.out.println("2: Remove an item from the cargo hold.");
System.out.println("3: Sort the contents of the cargo hold.");
System.out.println("4: Search for an item.");
System.out.println("5: Display the items in the cargo hold.");
System.out.println("0: Exit the BlackStar Cargo Hold interface.");
int userChoice = input.nextInt();
input.nextLine();
switch (userChoice) {
case 1:
addItem();
break;
case 2:
removeItem();
break;
case 3:
sortItems();
break;
case 4:
searchItems();
break;
case 5:
displayItems();
break;
case 0:
System.out.println("Thank you for using the BlackStar Cargo Hold interface. See you again soon!");
System.exit(0);
}
}
}
private void addItem() {
if (numItems == cargohold.length) {
System.out.println("Cargo Hold is full, remove some items first");
return;
}
System.out.println("Enter Item Name: ");
String name = input.nextLine();
System.out.println("Enter Weight: ");
double weight = Double.parseDouble(input.nextLine());
System.out.println("Enter Value: ");
double value = Double.parseDouble(input.nextLine());
System.out.println("Enter durability: ");
int durability = Integer.parseInt(input.nextLine());
System.out.println("Enter Numeric ID: ");
int id = Integer.parseInt(input.nextLine());
Item item = new Item(name, weight, value, durability, id);
cargohold[numItems] = item;
numItems++;
System.out.println("Item added successfully!");
}
private void removeItem() {
if (numItems == 0) {
System.out.println("Cargo hold is empty!");
return;
}
System.out.println("Enter item name");
String name = input.nextLine();
int index = searchByName(name);
if (index == -1) {
System.out.println("Item doesn't exist in the Cargo Hold");
} else {
for (int i = index; i < numItems - 1; i++) {
cargohold[i] = cargohold[i + 1];
}
numItems--;
System.out.println("Item removed successfuly");
}
}
private void sortItems() {
for (int i = 0; i < numItems - 1; ++i) {
int min = i;
for (int j = i + 1; j < numItems; ++j) {
if (cargohold[j].getName().compareTo(cargohold[min].getName()) < 0) {
min = j;
}
}
Item temp = cargohold[i];
cargohold[i] = cargohold[min];
cargohold[min] = temp;
}
System.out.println("Items are sorted!");
}
private void searchItems() {
System.out.println("1. Search by Name");
System.out.println("2. Search by ID");
int choice = Integer.parseInt(input.nextLine());
if (choice == 1) {
System.out.println("Enter name: ");
String name = input.nextLine();
int index = searchByName(name);
if (index == -1) {
System.out.println("Not found");
} else {
System.out.println("Item found at position " + index);
System.out.println("Name: " + cargohold[index].getName());
System.out.println("ID: " + cargohold[index].getID());
}
} else if (choice == 2) {
System.out.println("Enter ID: ");
int id = Integer.parseInt(input.nextLine());
int index = searchByID(id);
if (index == -1) {
System.out.println("Not found");
} else {
System.out.println("Item found at position " + index);
System.out.println("Name: " + cargohold[index].getName());
System.out.println("ID: " + cargohold[index].getID());
}
}
}
private int searchByName(String name) {
for (int i = 0; i < numItems; i++) {
if (cargohold[i].getName().equalsIgnoreCase(name)) {
return i;
}
}
return -1;
}
private int searchByID(int ID) {
for (int i = 0; i < numItems; i++) {
if (cargohold[i].getID() == ID) {
return i;
}
}
return -1;
}
private void displayItems() {
Item[] uniqueItems = new Item[numItems];
int[] counts = new int[numItems];
int counter = 0;
for (int i = 0; i < numItems; i++) {
int foundIndex = -1;
String name = cargohold[i].getName();
for (int j = 0; j < counter; j++) {
if (uniqueItems[j].getName().equalsIgnoreCase(name)) {
foundIndex = j;
}
}
if (foundIndex == -1) {
uniqueItems[counter] = cargohold[i];
counts[counter]++;
counter++;
} else {
counts[foundIndex]++;
}
}
for (int i = 0; i < counter; i++) {
System.out.println("Item Name: " + uniqueItems[i].getName()
+ ", count - " + counts[i]);
}
}
public void addItem(Item cargohold[]) {
}
public void removeItem(Item cargohold[]) {
}
public void sortItems(Item cargohold[]) {
}
public void searchItemsByName(Item cargohold[]) {
}
public void searchItemsByID(Item cargohold[]) {
}
public void displayItems(Item cargohold[]) {
// TODO: Display only the unique items along with a count of any duplicates
// For example it should say
// Food - 2
// Water - 3
// Ammunition - 5
}
}
package Assignments;
public class Item {
private String name;
private double weight;
private double value;
private int durability;
private int ID;
public Item(){
}
public Item(String name, double weight, double value, int durability, int iD) {
this.name = name;
this.weight = weight;
this.value = value;
this.durability = durability;
ID = iD;
}
/* getters and setters
* */
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public double getWeight() {
return weight;
}
public void setWeight(double weight) {
this.weight = weight;
}
public double getValue() {
return value;
}
public void setValue(double value) {
this.value = value;
}
public int getDurability() {
return durability;
}
public void setDurability(int durability) {
this.durability = durability;
}
public int getID() {
return ID;
}
public void setID(int iD) {
ID = iD;
}
}
package Project;
import java.util.Arrays;
import java.util.Collections;
import java.util.Scanner;
import Item.ComparableItem;
import java.util.ArrayList;
public class Assignment3 {
Scanner input = new Scanner(System.in);
public static void main(String[] args) {
new Assignment3();
}
// This will act as our program switchboard
public Assignment3() {
ArrayList<Item> cargohold = new ArrayList<Item>();
System.out.println("Welcome to the BlackStar Cargo Hold interface.");
System.out.println("Please select a number from the options below");
System.out.println("");
while (true) {
// Give the user a list of their options
System.out.println("1: Add an item to the cargo hold.");
System.out.println("2: Remove an item from the cargo hold.");
System.out.println("3: Sort the contents of the cargo hold.");
System.out.println("4: Search for an item.");
System.out.println("5: Display the items in the cargo hold.");
System.out.println("0: Exit the BlackStar Cargo Hold interface.");
// Get the user input
int userChoice = input.nextInt();
input.nextLine();
switch (userChoice) {
case 1:
addItem(cargohold);
break;
case 2:
removeItem(cargohold);
break;
case 3:
sortItems(cargohold);
break;
case 4:
searchItems(cargohold);
break;
case 5:
displayItems(cargohold);
break;
case 0:
System.out.println("Thank you for using the BlackStar Cargo Hold interface. See you again soon!");
System.exit(0);
default:
System.out.println("Invalid value. Choose a number 0-5 only.");
break;
}
}
}
private void addItem(ArrayList<Item> cargohold) {
cargohold.add(new Item());
int index = cargohold.size();
Item tempItem = new Item();
System.out.println("Enter the Item's name");
String userInput = input.nextLine();
tempItem.setItemName(userInput);
System.out.println("Enter the Item's weight");
userInput = input.nextLine();
tempItem.setItemWeight(userInput);
System.out.println("Enter the Item's value");
userInput = input.nextLine();
tempItem.setItemValue(userInput);
System.out.println("Enter the Item's durability");
userInput = input.nextLine();
tempItem.setItemDurability(userInput);
System.out.println("Enter the Item's ID");
userInput = input.nextLine();
tempItem.setItemID(userInput);
cargohold.set(index - 1, tempItem);
System.out.println("Item added successfully");
return;
}
private void removeItem(ArrayList<Item> cargohold) {
int index = cargohold.size();
if(index == 0) {
System.out.println("The cargohold has no items to remove!");
return;
} else {
System.out.println("Enter the name of the item to be removed.");
String userInput = input.nextLine();
for(int i = 0; i < cargohold.size(); i++) {
cargohold.get(i);
if(Item.name.equals(userInput)) {
cargohold.get(i);
Item.name = "none";
cargohold.get(i);
Item.weight = "none";
cargohold.get(i);
Item.value = "none";
cargohold.get(i);
Item.durability = "none";
cargohold.get(i);
Item.ID = "none";
System.out.println("Item removed.");
break;
} else if (i == cargohold.size() - 1) {
System.out.println("That item is not in the cargohold.");
}
}
return;
}
}
private void sortItems(ArrayList<Item> cargohold) {
int index = cargohold.size();
if(index <= 1) {
System.out.println("The cargohold has too few items to sort.");
return;
} else {
System.out.println(compareTo(cargohold.get(1), cargohold.get(2)));
}
/*
for(int x = 0; x < 5; x++) { //this for loop repeats the sorting process according to the length of the array to enhance sorting accuracy
for (int i = 0; i < cargohold.size(); i++) {
int minimum = i;
//System.out.println(minimum);
for (int j = i + 1; j < cargohold.length; j++) {
//System.out.println(j);
//System.out.println(cargohold[i].compareTo(cargohold[minimum]));
if(!cargohold[j].name.equals("none")) {
if(cargohold[j].name.compareTo(cargohold[minimum].name) < 0) {
minimum = j;
//Debug Note: Outputs array reassignments in real time.
//System.out.println("Swapping " + cargohold[i] + " with " + cargohold[minimum]);
//System.out.println(Arrays.asList(cargohold));
Item transfer = cargohold[i];
cargohold[i] = cargohold[minimum];
cargohold[j] = transfer;
}
}
}
}
}
System.out.println("cargohold sorted.");*/
return;
}
private void searchItems(ArrayList<Item> cargohold) {
System.out.println("Enter the name of the item you wish to search for.");
String userInput = input.nextLine();
for(int i = 0; i < cargohold.size(); i++) {
if (userInput.equals(cargohold.get(i).name)) {
System.out.println("The item was found at section number " + (i + 1));
return;
}
}
System.out.println("The item was not found in the cargo hold.");
}
private void displayItems(ArrayList<Item> cargohold) {
while (true) {
// Give the user a list of their options
System.out.println("1: Display all items in the cargohold");
System.out.println("2: Display a specific item in the cargohold");
// Get the user input
int userChoice = input.nextInt();
input.nextLine();
switch (userChoice) {
case 1:
//simple output
for(int i = 0; i < cargohold.size(); i++) {
cargohold.get(i);
System.out.println(Item.name);
cargohold.get(i);
System.out.println(Item.weight);
cargohold.get(i);
System.out.println(Item.value);
cargohold.get(i);
System.out.println(Item.durability);
cargohold.get(i);
System.out.println(Item.ID);
}
return;
case 2:
return;
default:
System.out.println("Invalid value. Choose a number 1-2 only.");
break;
}
}
}
}
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