Here is a code that displays the following pattern:

     1
    212
   32123
  4321234
 543212345
  4321234
   32123
    212
     1

class Pattern{
  public static void main(String args[]){
    int i,j,k,l;
    for(i=1;i<6;i++){
       for(j=5;j>i;j--)
           System.out.print(" ");
        for(k=i;k>=1;k--)
          System.out.print(k);
            for(l=2;l
               System.out.print(l);

         System.out.println("");
         }
       for(i=1;i<5;i++){
        for(j=i;j>=1;j--)
        System.out.print(" ");
           for(k=5-i;k>=1;k--)
            System.out.print(k);
              for(l=2;l<6-i;l++)
                System.out.print(l);

         System.out.println("");
         }
    }
 }