int numberColumns = 2;
int numberRows = 4;
int[][] defaultArray = { {2, 7},
                         {8, 4},
                         {5, 1},
                         {6, 9} };


int[][] transpose(int[][] defaultArray) {
    int[][] temp = new int[numberColumns][numberRows];
    for (int i = 0; i < numberRows; i++) {
      for (int j = 0; j < numberColumns; j++) {
        temp[j][i] = defaultArray[i][j];
      }
    }
  }