I didn't think I would have as much trouble since I've done this with a brute force method with regular arrays. I'm trying to use Collections.frequency to group together repeated entries from a user and display the number of times each entry occurs (if more than once); however, the output just prints as they are entered. I have two classes, which I will show below:
public class Flower {
private String name;
private String color;
private String smell;
private String hasThorns;
public Flower(String name, String color, String smell, String hasThorns) {
this.name = name;
this.color = color;
this.smell = smell;
this.hasThorns = hasThorns;
}
public void setName(String name) {
this.name = name;
}
public void setColor(String color) {
this.color = color;
}
public void setSmell(String smell) {
this.smell = smell;
}
public void setThorns(String hasThorns) {
this.hasThorns = hasThorns;
}
public String getName() {
return name;
}
public String getColor() {
return color;
}
public String getSmell() {
return smell;
}
public String getThorns() {
return hasThorns;
}
public String toString() {
return "Name: " + this.name + ", Color: " + this.color + ", Scent? " + this.smell + ", Thorns? " + this.hasThorns;
}
}//end Flower class
import java.util.*;
public class Assignment3 {
String name = new String();
String color = new String();
String smell = new String();
String hasThorns = new String();
//ArrayList<Flower> flowerPack = new ArrayList<Flower>();
boolean found = false;
public static void main(String[] args) {
new Assignment3();
}
// This will act as our program switchboard
public Assignment3() {
Scanner input = new Scanner(System.in);
ArrayList<Flower> flowerPack = new ArrayList<Flower>();
System.out.println("Welcome to my flower pack 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 pack.");
System.out.println("2: Remove an item from the pack.");
System.out.println("3: Search for a flower.");
System.out.println("4: Display the flowers in the pack.");
System.out.println("5: Filter flower pack by incomplete name");
System.out.println("0: Exit the flower pack interface.");
// Get the user input
int userChoice = input.nextInt();
switch (userChoice) {
case 1:
addFlower(flowerPack);
break;
case 2:
removeFlower(flowerPack);
break;
case 3:
searchFlowers(flowerPack);
break;
case 4:
displayFlowers(flowerPack);
break;
case 5:
filterFlowers(flowerPack);
break;
case 0:
exitInterface();
break;
default:
System.out.println("Invalid entry. \nPlease choose between 1-5, or 0: ");
break;
}
}
}
private void addFlower(ArrayList<Flower> flowerPack) {
// TODO: Add a flower that is specified by the user
Flower newFlower = new Flower(name, color, smell, hasThorns);
Scanner input = new Scanner(System.in);
if(flowerPack.size() < 25)
{
System.out.println("Enter the name of the flower you wish to add: ");
newFlower.setName(input.nextLine());
System.out.println("Enter the color of the flower: ");
newFlower.setColor(input.nextLine());
System.out.println("Does the flower have a scent? Yes or No: ");
newFlower.setSmell(input.nextLine());
System.out.println("Does the flower have thorns? Yes or No: ");
newFlower.setThorns(input.nextLine());
flowerPack.add(newFlower);
}
else
{
System.out.println("You may only hold 25 flowers in your flower pack. Please remove at least one before adding another.");
}
}
private void removeFlower(ArrayList<Flower> flowerPack) {
// TODO: Remove a flower that is specified by the user
Scanner input = new Scanner(System.in);
System.out.println("Enter the name of the flower you want to remove: ");
String deleteName = input.nextLine();
System.out.println("Enter the color of the flower you want to remove: ");
String deleteColor = input.nextLine();
System.out.println("Is this a flower with a scent? Yes or No: ");
String deleteSmell = input.nextLine();
System.out.println("Is this a flower with thorns? Yes or No: ");
String deleteThorns = input.nextLine();
for(int i = 0; i < flowerPack.size(); i++) {
if(flowerPack.get(i).getName().equals(deleteName) && flowerPack.get(i).getColor().equals(deleteColor) && flowerPack.get(i).getSmell().equals(deleteSmell) && flowerPack.get(i).getThorns().equals(deleteThorns))
{
flowerPack.remove(i);
found = true;
break;
}
if(found)
{
System.out.println("That flower was successfully removed from your inventory.");
}
else
{
System.out.println("That flower was not found in your inventory.");
}
}
}
private void searchFlowers(ArrayList<Flower> flowerPack) {
// TODO: Search for a user specified flower
}
This is where I am having the problem. I haven't started the other methods (search, filter) since I want it to display correctly before moving on.
private void displayFlowers(ArrayList<Flower> flowerPack) {
// TODO: Display flowers using any technique you like
for(Flower flower : flowerPack) {
int duplicates = Collections.frequency(flowerPack, flower);
System.out.println(flower + " - " + duplicates);
}
}
private void filterFlowers (ArrayList<Flower> flowerPack) {
// TODO Filter flower results
}
private void exitInterface() {
Scanner input = new Scanner(System.in);
System.out.println("Are you sure you want to exit the flower pack interface? Y or N: ");
while(true) {
String answer = input.next();
if(!"Y".equalsIgnoreCase(answer) && !"N".equalsIgnoreCase(answer))
{
System.out.println("Please enter Y or N (not case-sensitive): ");
}
if("Y".equalsIgnoreCase(answer))
{
System.out.println("Thank you for using the flower pack interface. See ya later!");
System.exit(0);
}
if("N".equalsIgnoreCase(answer))
{
break;
}
}
}
}
I've seen examples with Maps/HashSets, but I'm too unfamiliar with those concepts to utilize them at this point.
This is the output, which is incorrect. Could someone give me a hint as to where I went wrong?
Name: rose, Color: red, Scent? yes, Thorns? yes - 1
Name: rose, Color: red, Scent? yes, Thorns? yes - 1
Name: rose, Color: pink, Scent? yes, Thorns? no - 1
Name: daffodil, Color: yellow, Scent? yes, Thorns? no - 1
As you can see, the first two entries should read as one, but with -2:
Like:
Name: rose, Color: red, Scent? yes, Thorns? yes - 2
