I need to create a 2 Dimension Array, it needs to do the following. 1, it needs

Question

I need to create a 2 Dimension Array, it needs to do the following.

1, it needs to be a customized array (you create the amount of rows and columns)

2, it needs a method called getTotal, that accepts the 2d array and return the values of all the numbers in the array, (1+2+3+4+5+6; getTotal=15)

3, it needs a method called getAverage " " and return the average of the array

4, it needs a method called getRowTotal and returns (reports) the total of each row

5, it needs a method called getColumnTotal, returns the total of each column

6,it needs a method called getHighestInRow, returns the highest value and reports which row it is in

7,it needs a method called getLowestInRow, returns the lowest value and reports which row it is in

Explanation / Answer

please rate - thanks

import java.util.*;
    public class matrix718
   {
      public static void main(String[] args)
      {Scanner in = new Scanner(System.in);
        int n,i,j;
        System.out.print("Enter size of matrix: ");
        n=in.nextInt();
        while(n<2)
           {System.out.println("size must be at least 2");
            System.out.print("Enter size of matrix: ");
           n=in.nextInt();
            }       
        int [][] a = new int [n][n];
      Random r=new Random();
        for(i=0;i<n;i++)
           for(j=0;j<n;j++)
               {
                a[i][j]=r.nextInt(500);
                }
        System.out.println("The Matrix:");
        for(i=0;i<n;i++)
           {for(j=0;j<n;j++)
               System.out.print(a[i][j]+" ");
            System.out.println(" ");
            }
        System.out.println("The total of all elements is "+getTotal(a));
        System.out.println("The average of all elements is "+getAverage(a));
        System.out.println("The total of all elements in row 3 is "+getRowTotal(a,3));
        System.out.println("The total of all elements in column 3 is "+getColumnTotal(a,3));
        System.out.println("The highest element in row 3 is "+getHighestInRow(a,3));
        System.out.println("The lowest element in column 3 is "+getLowestInRow(a,3));
    }
public static int getTotal(int a[][])
{int i,j,tot=0;
for(i=0;i<a.length;i++)
    for(j=0;j<a[0].length;j++)
          tot+=a[i][j];
return tot;
}
public static double getAverage(int a[][])
{return (double)getTotal(a)/(a.length*a[0].length);
}
public static int getRowTotal(int a[][],int n)
{int j,tot=0;
    for(j=0;j<a[0].length;j++)
          tot+=a[n][j];
return tot;
}
public static int getHighestInRow(int a[][],int n)
{int j,max=a[n][0];
    for(j=0;j<a[0].length;j++)
          if(a[n][j]>max)
                 max=a[n][j];
return max;
}
public static int getLowestInRow(int a[][],int n)
{int j,low=a[n][0];
    for(j=0;j<a[0].length;j++)
          if(a[n][j]<low)
                 low=a[n][j];
return low;
}

public static int getColumnTotal(int a[][],int n)
{int j,tot=0;
    for(j=0;j<a.length;j++)
          tot+=a[j][n];
return tot;
}

}

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