Spiralize a 2D square matrix i.e nxn matrix

gistfile1.txt

public class SpiralMatrix {

    /*
        Problem:
        Spiralize a 2D square matrix i.e (nxn)

        input:          123
                        456
                        789

        result:         123
                        894
                        765
     */

    public static void main(String[] args) {

        int size = 3;
        int[][] matrix = new int[size][size];
        int len = matrix.length;
        int seed = 1;
        int indexValue = seed;
        int rowOffset = 0;

        //spiralize  2D square matrix (nxn)
        for (int k = 1; k <= 2; k++) {
            if (k == 1)
                for (int i = 0; i < len; i++) {

                    for (int j = 0; j < len; j++) {
                        if (i == 0) {
                            matrix[i][j] = seed++;
                            indexValue = seed;
                        } else if (i > 0) {
                            matrix[i][len - 1] = indexValue;
                            indexValue++;
                            break;
                        }
                    }
                }
            else
                for (int i = len; i >= 0; i--) {
                    if (i > 1 && rowOffset == 0) {
                        for (int j = len; j >= 0; j--) {
                            if (i > 0 && j < len - 1) {
                                matrix[i - 1][j] = indexValue;
                                indexValue++;
                            }
                        }
                        rowOffset = 1;
                    } else if (i > 1 && rowOffset == 1) {
                        for (int j = 0; j < len; j++) {
                            if (i > 0 && j < len - 1) {
                                matrix[i - 1][j] = indexValue;
                                indexValue++;
                            }
                        }
                        rowOffset = 0;
                    }
                }
            }
        }
    }