Find Number Of Rows In CSV File

Feb 13, 2014

I am working through a text and I am supposed to complete the following tasks.

Your ReadFiles.java class requires the following methods:

Method: check to see if the file exists

Method: find number of rows in csv file

Method: Converts the csv file to a mutli-dimensional array

Method: PrintArray

Method: Return array using a get method

Create a file DataAnalyzer.java. This file will be used to call the methods in ReadFiles.java. Be sure to demonstrate that all of your methods work through DataAnalyzer.java.

The problem is that it does not really provide any information on how to go about reading a file into an array. I am stuck at the third task of converting the file to an array and I have tried several ways to do this unsuccessfully. I thought that I would at least try to get things to print out (line 87) to see if I could get that to work, but all that prints in null over and over again.

Java Code:

public class DataAnalyzer {
public static void main (String[] args) {
ReadFiles aReadFiles = new ReadFiles();
aReadFiles.fileCheck();
aReadFiles.findRows();
aReadFiles.convertFile();

[Code] .....

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triangle(0) → 0

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I am continuing on in trying to build up the basics of matrix algebra from scratch.

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[Code] ......

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[Code] ....

How I call this, inside a public static void main(String[] args), is as follows:

// Declares that A is a 2 by 2 matrix.
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pony[3]=6;
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//Note that I want A is stay as I initialized it.

//I dont want A to have it's 2 rows switched. I want B to the matrix obtained by switching two rows of A.

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Java Code:

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