/*
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 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package javaapplication1;

import java.io.*;
import java.util.ArrayList;
import java.util.Scanner;



/**
 *
 * @author grahg
 */
public class JavaApplication1 {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws IOException {
        // PRVNI
        float [][]matice = new float[10][10];
        for (int i=0;i<10;++i)
            for (int j=0;j<10;++j)
                matice[i][j]=(float) Math.random();

           String csv = "10,10,\n";



           for (int i=0;i<10;++i){
               for (int j=0;j<10;++j) {
                   csv = csv + matice[i][j] + ",";
               }
               csv = csv + "\n";
           }

        File file = new File("/home/grahg/filename.txt");

            // if file doesnt exists, then create it
    if (!file.exists()) {
            file.createNewFile();
        }

    FileWriter fw = new FileWriter(file.getAbsoluteFile());
        BufferedWriter bw = new BufferedWriter(fw);
    bw.write(csv);
    bw.close();




        // DRUHY
        BufferedReader br = new BufferedReader(new FileReader("/home/grahg/filename.txt"));
        String line;

        line = br.readLine();
        String[] parts = line.split(",");
        int x = Integer.parseInt(parts[0]);
        int y = Integer.parseInt(parts[1]);

        float [][]matice2 = new float[x][y];

        int i=0;
        while ((line = br.readLine()) != null) {
             String[] values = line.split(",");

             for (int j=0; j<y; ++j)
             {
                 matice2[i][j]= Float.parseFloat(values[j]);
             }
             ++i;
    }

        /*

           for (int xx=0;xx<10;++xx){
               for (int yy=0;yy<10;yy++) {
                   System.out.println(matice2[xx][yy] + ",");
               }
               System.out.println("\n");
           }

           */
    }

}