Here is a java code that displays the following pattern

1234554321

1234 4321

123 321

12 21

1 1

class Pattern{
     public static void main(String args[]){

           for(int j=1;j<=5;j++){
               System.out.print(j);
           }
           for(int i=5;i>=1;i--){
              System.out.print(i);
           }
           System.out.println();

           for(int i=4;i>=1;i--){
           for(int j=1;j<=i;j++){
               System.out.print(j);
           }
           for(int j = 0; j < 1; j++){
               System.out.print(" ");
           }
           for(int j=i;j>=1;j--){
            System.out.print(j);
           }
            System.out.println();
       }
    }
}