arrays - How do I fix my addition for summing a specific row and column in java? -

i have of other methods required class program working properly, can not think of how fix row input , sum method , column input , sum method. apologize ridiculously long method names, methods pre-named assignment.

import java.util.scanner;  public class two_d_array_cmps280_2016 {// begin class two_d_array_cmps280_2016    public static void main(string args[])    {// begin main method     int[][] brianarray =     {// initialize array , hard code values       {1, 2, 3, 4},       {5, 6, 7, 8},       {9, 10, 11, 12},       {13, 14, 15, 16}    };// end array initialization        // print segment print values methods brianarray    system.out.print("the sum of elements " + total_2darray_elements(brianarray));    system.out.print("\nthe average of elements " + average_2darray_elements(brianarray));    system.out.print("the sum is: " + total_2darray_elements_by_certain_row_number(brianarray));    system.out.print("the sum is: " + total_2darray_elements_by_certain_column_number(brianarray));    system.out.print("the largest value is: " + the_largest_value_in_certain_row_number(brianarray));    system.out.print("the largest value is: " + the_largest_value_in_certain_column_number(brianarray));     }// end main method    public static void printarray(int[][] myarray)    {// begin print arrrays        (int = 0; < myarray.length; i++)        {            (int j = 0; j < myarray[i].length; j++)            {            system.out.print(myarray[i][j] + " ");            }        system.out.println();           }    }// end printarray method           public static int total_2darray_elements(int[][] myarray)    {// begin method sum array values        int total = 0;        (int = 0; < myarray.length; i++)        {            (int j = 0; j < myarray[i].length; j++)            {            total += myarray[i][j];            }        }    return total;    }     public static int average_2darray_elements(int[][] myarray)    {// begin method sum array values        int total = 0;        int average = 0;        (int = 0; < myarray.length; i++)        {            (int j = 0; j < myarray[i].length; j++)            {                total += myarray[i][j];                average = total / 16;            }        }        return average;     }// end method sum array values     public static int total_2darray_elements_by_certain_row_number(int[][] myarray)    {// begin method sum array user input row    java.util.scanner input = new scanner(system.in);    int total = 0;    system.out.println("\nplease enter row sum: ");      int row = input.nextint() - 1;        (int = row; < myarray.length; i++)        {            (int j = 0; j < myarray[0].length; j++)            {            total += myarray[row][j];            }         }        return total;        }// end method sum array user input row     public static int total_2darray_elements_by_certain_column_number(int[][] myarray)    {// begin method sum array user input column    java.util.scanner input = new scanner(system.in);    int total = 0;    system.out.println("\nplease enter column sum: ");      int column = input.nextint() - 1;      (int = 0; < myarray.length; i++)      {         (int j = column; j < myarray[0].length; j++)         {            total += myarray[i][column];         }       }      return total;    }// end method sum array user input column     public static int the_largest_value_in_certain_row_number(int[][] myarray)    {// begin method return largest number user input row    java.util.scanner input = new scanner(system.in);    int highestvalue = 0;    system.out.println("\nplease enter row highest value from: ");        int row = input.nextint() - 1;         (int = row; < myarray.length; i++)        {            (int j = 0; j < myarray[i].length; j++)            {            if (myarray[row][j] > highestvalue)               highestvalue = myarray[row][j];            }        }        return highestvalue;    }// end method return largest number user input row     public static int the_largest_value_in_certain_column_number(int[][] myarray)    {// begin method return largest number user input column    java.util.scanner input = new scanner(system.in);    int highestvalue = 0;    system.out.println("\nplease enter column highest value from: ");        int column = input.nextint() - 1;         (int = 0; < myarray.length; i++)        {            (int j = column; j < myarray[i].length; j++)            {                if (myarray[i][column] > highestvalue)                    highestvalue = myarray[i][column];            }        }        return highestvalue;    }// end method return largest number user input column  }// end class 

change methods following, should :

public static int total_2darray_elements_by_certain_row_number(int[][] myarray)    {// begin method sum array user input row    java.util.scanner input = new scanner(system.in);    int total = 0;    system.out.println("\nplease enter row sum: ");      int row = input.nextint() - 1;            (int j = 0; j < myarray[0].length; j++) {               total += myarray[row][j];            }        return total;       }// end.. 

and

public static int total_2darray_elements_by_certain_column_number(int[][] myarray)    {// begin method sum array user input column    java.util.scanner input = new scanner(system.in);    int total = 0;    system.out.println("\nplease enter column sum: ");      int column = input.nextint() - 1;      (int = 0; < myarray.length; i++) {            total += myarray[i][column];         }      return total;    }// end m..