Help!!!!!! Sudoku?? 10points! Java Problem!?

This a matrix/ part sudoku can someone help me on how to make an input on this or should I just start all over again?

import java.io.*;

public class Soduko {

public static void main(String[] args) {

int[][] matrix = parseProblem(args);

writeMatrix(matrix);

if (solve(0,0,matrix)) // solves in place

writeMatrix(matrix);

else

System.out.println("");

}

static boolean solve(int i, int j, int[][] cells) {

if (i == 9) {

i = 0;

if (++j == 9)

return true;

}

if (cells[i][j] != 0) // skip filled cells

return solve(i+1,j,cells);

for (int val = 1; val <= 9; ++val) {

if (legal(i,j,val,cells)) {

cells[i][j] = val;

if (solve(i+1,j,cells))

return true;

}

}

cells[i][j] = 0; // reset on backtrack

return false;

}

static boolean legal(int i, int j, int val, int[][] cells) {

for (int k = 0; k < 9; ++k) // row

if (val == cells[k][j])

return false;

for (int k = 0; k < 9; ++k) // col

if (val == cells[i][k])

return false;

int boxRowOffset = (i / 3)*3;

int boxColOffset = (j / 3)*3;

for (int k = 0; k < 3; ++k) // box

for (int m = 0; m < 3; ++m)

if (val == cells[boxRowOffset+k][boxColOffset+m])

return false;

return true; // no violations, so it's legal

}

static int[][] parseProblem(String[] args) {

int[][] problem = new int[9][9]; // default 0 vals

for (int n = 0; n < args.length; ++n) {

int i = Integer.parseInt(args[n].substring(0,1));

int j = Integer.parseInt(args[n].substring(1,2));

int val = Integer.parseInt(args[n].substring(2,3));

problem[i][j] = val;

}

return problem;

}

static void writeMatrix(int[][] solution) {

for (int i = 0; i < 9; ++i) {

if (i % 3 == 0)

System.out.println(" -----------------------");

for (int j = 0; j < 9; ++j) {

if (j % 3 == 0) System.out.print("| ");

System.out.print(solution[i][j] == 0

? " "

: Integer.toString(solution[i][j]));

System.out.print(' ');

}

System.out.println("|");

}

System.out.println(" -----------------------");

}

}