Numeric Diamond Pattern

Diamond Pattern using Recursion

class DiamondRecursion {
    static void column(int c, int a) {
        System.out.print(a + " ");
        if (a < c) {
            column(c, a+1);
            System.out.print(a + " ");
        }
    }
    static void row(int r, int a) {
        for (int i=0; i<r-a; i++) 
            System.out.print("  ");
        column(a, 1); System.out.println();
        if (a < r) {
            row(r, a+1);
            for (int i=0; i<r-a; i++) 
                System.out.print("  ");
            column(a, 1); System.out.println();
        }
    }
    public static void main(String args[]) {
        row(new java.util.Scanner(System.in).nextInt(), 1);
    }
}

Diamond Pattern using Iteration

class DiamondIteration {
    static void column(int N, int c) {
        for (int i = 0; i < N-c; i++) 
            System.out.print("  ");
        for (int i = 1; i < c; i++)
            System.out.print(i + " ");
        for (int i=c; i>0; i--)
            System.out.print(i + " ");
        System.out.println();
    }
    static void row(int N) {
        for (int i=1; i<N; i++)
            column(N, i);
        for (int i=N; i>0; i--)
            column(N, i);
    }
    public static void main(String args[]) {
        row(new java.util.Scanner(System.in).nextInt());
    }
}

Input

5

Output

        1
      1 2 1 
    1 2 3 2 1 
  1 2 3 4 3 2 1 
1 2 3 4 5 4 3 2 1 
  1 2 3 4 3 2 1 
    1 2 3 2 1 
      1 2 1 
        1