Java Program to print given Number Pattern.

package demo;
import java.util.Scanner;
public class NumberPattern 
{
 public static void main(String[] args) 
 {
  int num, n;
  Scanner sc = new Scanner(System.in);
  System.out.print("Enter any number : ");
  num = sc.nextInt();
  n = num;
  for (int r = 1; r <= num; r++, n--) 
  {
   for (int c = 1; c <= n; c++) 
   {
    System.out.print(c);
   }
   for (int c = n - 1; c >= 1; c--) 
   {
    System.out.print(c);
   }
   System.out.println();
  }
 }
}

Output:
Enter any number : 5
123454321
1234321
12321
121
1

BUILD SUCCESSFUL (total time: 3 seconds)