A Sensational Circular Matrix program

import java.io.*;
class Circular
{
public static void main()throws IOException
{
    BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
    System.out.println("Enter the length of the double dimensions-rows&columns-- ONLY ONE DIGIT IS TO BE ENTERED FOR BOTH");
    int r=Integer.parseInt(br.readLine());
    int c=r;
    int Arr[][]=new int[r][c];
    int k=1;
    int c1=0;
    int c2=c-1;
    int r1=0;
    int r2=r-1;
    System.out.println("--------CIRCULAR MATRIX------------");
    while(k<=(r*c))
    {
        for(int i=c1;i<=c2;i++)
        {
            Arr[r1][i]=k++;
        }
        for(int j=r1+1;j<=r2;j++)
        {
            Arr[j][c2]=k++;
        }
        for(int i=c2-1;i>=c1;i--)
        {
            Arr[r2][i]=k++;
        }
        for(int i=r2-1;i>=r1+1;i--)
        {
            Arr[i][c1]=k++;
        }
        c1 ++;
        c2 --;
        r1 ++;
        r2 --;
    }
    for(int i=0;i<r;i++)
    {
        for(int j=0;j<c;j++)
        {
            System.out.print(Arr[i][j]+"\t");
        }
        System.out.println();
    }
}