Question

Here is an example output that I am looking for, for my program.

Example Output

On each line enter a stadium name and the game revenue

Enter done when you are finished

Giants 1000

Foxboro 500

Giants 1500

done

Enter the name of a stadium to get the total revenue for:

Giants

The total revenue is 2500.00

I got everything working but the total revenue at the end. I’m not sure how to go into my linkedlist and grab the game revenue and display it.. This is my code right now, and what I have been messing with…

import java.util.LinkedList;
import java.util.Scanner;


public class LinkedLists {

    private final Scanner keyboard;



    private final LinkedList<String> stadiumNames;
    private final LinkedList<Integer> gameRevenue;


    public LinkedLists() {
        this.keyboard = new Scanner(System.in);
        this.stadiumNames = new LinkedList<String>();
        this.gameRevenue = new LinkedList<Integer>();
    }

    public void addData(String stadium, int revenue){
        stadiumNames.add(stadium);
        gameRevenue.add(revenue);
    }

    public void loadDataFromUser() {
        System.out.println("On each line enter the stadium name and game revenue.");
        System.out.println("Enter done when you are finished.");

        boolean done = false;
        while(!done) {
            System.out.print("Enter the name of the stadium:");
            String stadium = keyboard.next();
            if (stadium.equals("done")) {
                done = true;
            } else {
                System.out.print("Enter game revenue: ");
                addData(stadium, keyboard.nextInt());
            }
        }
    }

    // return -1 if not found
    public int getIndexForName(String name) {

        if(stadiumNames.contains(name)){
            System.out.println("The total revenue is: " +gameRevenue.get(0));
            System.exit(0);
        }

        return -1;

    }


    public void showInfoForName(String name) {
        int index = getIndexForName(name);
        if (index==-1) {
            System.out.println("There is no stadium named " + name);
        } else {

        }
    }

    public void showInfoForName() {
        System.out.println("Enter the name of the stadium to get the total revenue for it.");
        showInfoForName(keyboard.next());
    }

    public static void main(String[] args) {
        LinkedLists pgm = new LinkedLists();
        pgm.loadDataFromUser();
        pgm.showInfoForName();
    }
}

Answer 1

Try this:

public int getIndexForName(String name) {
    if (stadiumNames.contains(name)) {
        int total = 0;
        for (int i = 0 ; i < stadiumNames.size() ; i++)
            if (stadiumNames.get(i).equals(name))
                total += gameRevenue.get(i);
        System.out.println("The total revenue is: " + total);
        System.exit(0);
    }
    return -1;
}

There are better ways of doing this though. I would perhaps use a Map that maps each stadium name to its total revenue. You could update this map in the addData method.