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

package grafy;

import java.io.*;
import java.util.*;
/**
 *
 * @author Chobotnica
 */
public class Graf
{
    private int aPocetVrcholov;
    private int aPocetHran;

    private int[][] aMaticaPrilahlosti;


    public Graf(int paMaxVrcholov)
    {
        aPocetVrcholov = 0;
        aPocetHran = 0;
        aMaticaPrilahlosti = new int[paMaxVrcholov + 1][paMaxVrcholov + 1];

        for (int i = 0; i <= paMaxVrcholov; i++) {
            for (int j = 0; j <= paMaxVrcholov; j++) {
                aMaticaPrilahlosti[i][j] = 0;
            }
        }
    }

    public void nacitajSubor(String paNazovSuboru) throws FileNotFoundException, IOException
    {
        FileReader f = new FileReader(paNazovSuboru);
        Scanner s = new Scanner(f);
        aPocetVrcholov = s.nextInt();
        aPocetHran = s.nextInt();

        for (int i = 1; i <= aPocetHran; i++) {
            int u = s.nextInt();
            int v = s.nextInt();

            aMaticaPrilahlosti[u][v] = 1;
        }

        s.close();
        f.close();
    }

    public void vypisMaticu()
    {
        System.out.printf("\f");
        System.out.println();

        for (int i = 1; i <= aPocetVrcholov; i++) {
            for (int j = 1; j <= aPocetVrcholov; j++) {
                System.out.printf("%d ", aMaticaPrilahlosti[i][j]);
            }
            System.out.println();
        }
        System.out.println();
    }

    public void vypisGraf()
    {
        System.out.printf("%d %d\n", aPocetVrcholov, aPocetHran);

        for (int i = 1; i <= aPocetVrcholov; i++) {
            for (int j = 1; j <= aPocetVrcholov; j++) {
                if (aMaticaPrilahlosti[i][j] == 1) {
                    System.out.printf("%d %d\n", i, j);
                }
            }
        }
        System.out.println();
    }
}
--------------------------------------------
package grafy;

import java.io.*;
/**
 *
 * @author Chobotnica
 */
public class Main {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args)
    {
        try
        {
            Graf g = new Graf(4);
            g.nacitajSubor("graf1.txt");
            g.vypisMaticu();
            g.vypisGraf();
        }
        catch(FileNotFoundException e)
        {
            System.out.println("Subor neexistuje!");
            System.out.println(e);
        }
        catch(IOException e)
        {
            System.out.println("Chyba pri citani suboru!");
            System.out.println(e);
        }

        System.out.println("Koniec programu.");
    }
}