arrays.java

import java.io.File;
import java.io.IOException;
import java.util.Scanner;

/**
 * Bryan Ricker
 * CS130 Lab #3
 */
public class TwoDArrayOperations {
    public static void main(String[] args) throws IOException {
        double[][] table = loadArray(args[0]);

        for (int i = 0; i < table.length; i++) {
            System.out.println(getRowTotal(table, i));
        }

        for (int i = 0; i < table[0].length; i++) {
            System.out.println(getColumnTotal(table, i));
        }

        System.out.println(getTotal(table));
    }

    public static double[][] loadArray(String filename) throws IOException {
        Scanner inputFile = new Scanner(new File(filename));
        int lineCount = 0;
        int colCount = 0;

        while (inputFile.hasNext()) {
            String line = inputFile.nextLine();
            int len = line.split(" ").length;
            if (len > colCount) colCount = len;
            lineCount++;
        }

        inputFile.close();
        double[][] result = new double[lineCount][colCount];

        inputFile = new Scanner(new File(filename));

        for (int row = 0; row < lineCount; row++) {
            for (int col = 0; col < colCount; col++) {
                result[row][col] = inputFile.nextDouble();
            }
        }

        inputFile.close();

        return result;
    }

    public static double getTotal(double[][] table) {
        double total = 0.0;

        for (int i = 0; i < table.length; i++) {
            for (int j = 0; j < table[i].length; j++) {
                total += table[i][j];
            }
        }

        return total;
    }

    public static double getAverage(double[][] table) {
        int len = 0;

        for (int i = 0; i < table.length; i++) {
            len += table[i].length;
        }

        return getTotal(table) / len;
    }

    public static double getRowTotal(double[][] table, int row) {
        double total = 0.0;

        for (int i = 0; i < table[row].length; i++) {
            total += table[row][i];
        }

        return total;
    }

    public static double getColumnTotal(double[][] table, int column) {
        double total = 0.0;

        for (int i = 0; i < table.length; i++) {
            total += table[i][column];
        }

        return total;
    }

    public static double getHighestInRow(double[][] table, int row) {
        double highest = table[row][0];

        for (int i = 0; i < table[row].length; i++) {
            double num = table[row][i];
            if (num > highest) {
                highest = num;
            }
        }

        return highest;
    }

    public static double getLowestInRow(double[][] table, int row) {
        double lowest = table[row][0];

        for (int i = 0; i < table[row].length; i++) {
            double num = table[row][i];
            if (num < lowest) {
                lowest = num;
            }
        }

        return lowest;
    }
}