Sort Boundary Elements (Ascending)

Given a matrix of custom size the task is to sort only the boundary elements of the matrix in ascending order.

Example:

5790
8214
6348
Input Matrix

0344
9215
8876
Output Matrix
Java
import java.util.*;
public class SortMatrixABE
{
    public static void main(String args[])
    {
        int row=0,col=0,n=0,pos=0,temp=0;
        Scanner sc=new Scanner(System.in);
        System.out.print("Enter no.of rows: ");
        row=sc.nextInt();
        System.out.print("Enter no.of columns: ");
        col=sc.nextInt();
        if(row<1||col<1)
        {
            System.exit(1);
        }
        int ar[][]=new int[row][col];
        n=(row+col-2)*2;
        int t[]=new int[n];
        System.out.println("Enter matrix elements:-");
        for(int i=0;i<row;i++)
        {
            for(int j=0;j<col;j++)
            {
                ar[i][j]=sc.nextInt();
                if(i==0||j==0||i==row-1||j==col-1)
                {
                    t[pos]=ar[i][j];
                    pos++;
                }
            }
        }
        for(int i=0;i<n;i++)
        {
            for(int j=0;j<n-1-i;j++)
            {
                if(t[j]>t[j+1])
                {
                    temp=t[j];
                    t[j]=t[j+1];
                    t[j+1]=temp;
                }
            }
        }
        pos=0;
        for(int i=0;i<col;i++,pos++)
        {
            ar[0][i]=t[pos];
        }
        for(int i=1;i<row-1;i++,pos++)
        {
            ar[i][col-1]=t[pos];
        }
        for(int i=col-1;i>=0;i--,pos++)
        {
            ar[row-1][i]=t[pos];
        }
        for(int i=row-2;i>0;i--,pos++)
        {
            ar[i][0]=t[pos];
        }
        System.out.println("Boundary elements sorted matrix:-");
        for(int i=0;i<row;i++)
        {
            for(int j=0;j<col;j++)
            {
                System.out.print(ar[i][j]+"\t");
            }
            System.out.println();
        }
    }
}
Java