Question

JAVA ----Read the data from the file into the ArrayList(s) and print out the datavectors??

TXT

Keith
10
8
4
5
12
3
2
Anna
9
8
7
6
5
12
13
Derick
1
2
0
22
11
0
7
Susan
4
5
6
7
8
9
2

Answer 1

JAVA PROGRAM:

import java.util.Scanner;

import java.io.File;

import java.io.IOException;

import java.util.ArrayList;

public class Main {

    public static void main(String[] args) throws IOException {

        Scanner scan = new Scanner(new File("input.txt")); // Create Scanner object to read from file

        ArrayList<String> names = new ArrayList<String>();

        ArrayList<ArrayList<Integer>> data = new ArrayList<ArrayList<Integer>>();

        int n = 0;

        while (scan.hasNextLine()) {

            names.add(scan.next()); // Read a name and add it to names ArrayList

            data.add(new ArrayList<Integer>());

            // Read 7 data values into data ArrayList

            for (int i = 0; i < 7; i++) {

                data.get(n).add(scan.nextInt());

            }

            n++;

        }

        scan.close();

        // Output names along with data values

        for (int i = 0; i < n; i++) {

            System.out.print(names.get(i) + ": ");

            for (int j = 0; j < 7; j++) {

                System.out.print(data.get(i).get(j) + " ");

            }

            System.out.println();

        }

    }

}

OUTPUT:

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