Java - sort 2D array

package com.dirask.example;

​

public class Program {

​

    public static void main(String[] args) {

        int[][] array = {

            { 5,  3,  1 },

            { 8, -2,  0 },

            { 3,  7,  6 },

            { 9,  9, -3 }

        };

​

        // bubble sort example

        for (int i = 0; i < 4 * 3; ++i) {

            for (int j = 0; j < 4 * 3; ++j) {

                int a = array[i / 3][i % 3];

                int b = array[j / 3][j % 3];

​

                if(a < b) {

                    array[i / 3][i % 3] = b;

                    array[j / 3][j % 3] = a;

                }

            }

        }

​

        for (int i = 0; i < 4; ++i) {

            for (int j = 0; j < 3; ++j) {

                System.out.print(" " + array[i][j]);

            }

        }

    }

}

 -3 -2 0 1 3 3 5 6 7 8 9 9