Chapter 7. PC #16. 2D Array Operations

JAVA ECLIPSE

Write a program that creates a two-dimensional array initialized with test data. Use any primitive data type that you wish. The program should have the following methods:

getTotal. This method should accept a two-dimensional array as its argument and return the total of all the values in the array.

getAverage. This method should accept a two-dimensional array as its argument and return the average of all the values in the array.

getRowTotal. This method should accept a two-dimensional array as its first argument and an integer as its second argument. The second argument should be the subscript of a row in the array. The method should return the total of the values in the specified row.

getColumnTotal. This method should accept a two-dimensional array as its first argument and an integer as its second argument. The second argument should be the subscript of a column in the array. The method should return the total of the values in the specified column.

getHighestInRow. This method should accept a two-dimensional array as its first argument and an integer as its second argument. The second argument should be the

subscript of a row in the array. The method should return the highest value in the specified row of the array.

getLowestInRow. This method should accept a two-dimensional array as its first argument and an integer as its second argument. The second argument should be the subscript of a row in the array. The method should return the lowest value in the specified row of the array.

___________________________________________________________________________________

I have an incomplete code looks like this:

import java.io.File; import java.io.FileNotFoundException; import java.util.Scanner; public class ArrayOpperation { public static void main(String[] args) throws FileNotFoundException { String fileName = args[0]; File file = new File(filename); if(file.exists()) { double [][] array = getArray(file); for(int row = 0; row < array.length;row++) System.out.printf("Row %d total: %f ", row, getRowTotal(array, row)); for(int col = 0; col < array[0].length; col++); System.out.printf("Coulumn %d total: %f ", col, getColumnTotal(array, col)); }else{ System.out.printf("file %'s does not exist. , filename"); } } public static double[][] getArray(File file) throws FileNotFoundException { int rows = 0; int columns = 0; Scanner inputFile = new Scanner(file); while (inputFile.hasNext()) { String line = inputFile.nextLine(); if(rows == 0) { Scanner row = new Scanner(line); while (row.hasNext()) { row.nextDouble(); columns++; } row.close(); } rows++; } inputFile.close(); double [][] result = new double [rows][columns]; inputFile = new Scanner(file); for(int row = 0; row < rows; row++) { for(int col = 0; col < columns; col++) { result[row][col] = inputFile.nextDouble(); } } inputFile.close(); return result; } public static double getTotal(double [][] array) { } public static double getAverage(double [][] array) { } public static double getRowTotal(double [][] array) { } public static double getcolumnTotal(double [][] array) { } public static double getHighestInRow(double [][] array) { } public static double getLowestInRow(double [][] array) { }

____________________________________________________________________________________

I need it to be able to produce these output.

Test Case 1

Command Line Arguments	Files in the same directory
input1.txt	input1.txt input2.txt input3.txt input4.txt

Row 0 total: 6.0 Row 1 total: 15.0 Row 2 total: 24.0 Column 0 total: 12.0 Column 1 total: 15.0 Column 2 total: 18.0 Array total: 45.0 

Test Case 2

Command Line Arguments	Files in the same directory
input2.txt	input1.txt input2.txt input3.txt input4.txt

Row 0 total: 1012.55 Row 1 total: 1802.0 Row 2 total: 814.33 Column 0 total: 1568.77 Column 1 total: 1801.42 Column 2 total: 258.69 Array total: 3628.8799999999997 

Test Case 3

Command Line Arguments	Files in the same directory
input3.txt	input1.txt input2.txt input3.txt input4.txt

Row 0 total: 2025.1000000000001 Row 1 total: 3604.0 Row 2 total: 1628.6599999999999 Column 0 total: 1568.77 Column 1 total: 1801.42 Column 2 total: 258.69 Column 3 total: 1568.77 Column 4 total: 1801.42 Column 5 total: 258.69 Array total: 7257.759999999999 

Test Case 4

Command Line Arguments	Files in the same directory
input4.txt	input1.txt input2.txt input3.txt input4.txt

Row 0 total: 1012.55 Row 1 total: 1802.0 Row 2 total: 814.33 Row 3 total: 1012.55 Row 4 total: 1802.0 Row 5 total: 814.33 Row 6 total: 1012.55 Row 7 total: 1802.0 Row 8 total: 814.33 Column 0 total: 4706.3099999999995 Column 1 total: 5404.26 Column 2 total: 776.07 Array total: 10886.64 

Please help!