java - Implement the following method to sort the rows in a twodimensional array -

i have been working on problem day , cannot find out next. have sorting rows not sort last row completely. here code.i know once or gets feel stupid .thank you

    public class sort2drow {    public static void main (string [] args)    {       int[][] matrix = {{3,5,6}, {4,1,2},{9,8,7}};        system.out.println("before sort");       for(int row = 0; row <matrix.length; row++){          for(int col = 0; col <matrix[row].length; col++){             system.out.print(matrix[row][col] + " ");          }          system.out.println();       }        system.out.println();//spacer       system.out.println("after sort method");       sortrow(matrix);     }     public static int[][] sortrow(int[][] m)    {       int temp = 0;       for(int row = 0; row < m.length ; row++)       {          for(int col = 0; col < m.length -1; col++){             if(m[row][col] > m[row][col + 1])             {                temp = m[row][col];                m[row][col] = m[row][col + 1];                m[row][col + 1] = temp;             }          }        }         for(int row = 0; row <m.length; row++){          for(int col = 0; col <m[row].length; col++){             system.out.print(m[row][col] + " ");          }          system.out.println();       }         int[][] result = m;        return result;    }  } 

you're on right track, problem you're mistakenly assuming for(int row = 0; row < m.length ; row++) outer bubblesort loop. it's loop "loads" next row in 2-d array. you'll need add missing loop:

for(int col = 0; col < m[row].length; col++){ //this real outer bubblesort loop. change m[row].length     for(int nextcol = col; nextcol < m[row].length; nextcol++) {         if(m[row][col] > m[row][nextcol])         {            temp = //i'll let figure out            m[row][col] = //....            m[row][nextcol] = //...         }      } }