Sudoku

package putka2.sudoku;

import java.util.Scanner;

/**
 *
 * @author Adreno
 */
public class Putka2Sudoku {

    public static int[][] s;
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        String syote = "" + input.nextInt();
        s = new int[9][9];
        for (int i=0; i<9; i++) {
            s[0][i] = Integer.parseInt("" + syote.charAt(i));
        }
        ratkaise(1, 0);
        for (int y=0; y<9; y++) {
            StringBuilder sb = new StringBuilder();
            for (int x=0; x<9; x++) {
                sb.append(s[y][x]);
            }
            System.out.println(sb);
        }
    }
    
    public static boolean ratkaise(int y, int x) {
        boolean[] varatut = new boolean[10];
        for (int i=0; i<y; i++) {
            varatut[s[i][x]] = true;
        }
        for (int i=0; i<x; i++) {
            varatut[s[y][i]] = true;
        }
        int nextY = y;
        int nextX = x+1;
        if (nextX == 9) {
            nextX = 0;
            nextY = y+1;
            if (nextY == 9) return true;
        }
        for (int i=1; i<=9; i++) {
            if (varatut[i]) continue;
            s[y][x] = i;
            if (ratkaise(nextY, nextX)) return true;
            s[y][x] = 0;
        }
        return false;
    }
    
}

Test 1

Verdict: RUNTIME ERROR

Error: Could not find or load main class Putka2Sudoku

Test 2

Verdict: RUNTIME ERROR

Error: Could not find or load main class Putka2Sudoku

Test 3

Verdict: RUNTIME ERROR

Error: Could not find or load main class Putka2Sudoku

Test 4

Verdict: RUNTIME ERROR

Error: Could not find or load main class Putka2Sudoku

Test 5

Verdict: RUNTIME ERROR

Error: Could not find or load main class Putka2Sudoku