How to get Number pattern in specific shape (java)?

i want to print number pattern like this..

   1
  212
 32123
4321234

but, i failed to get this triangle shape,and i am confused how to put spaces to get this shape-->

Here's the code i tried so far

public class Ch {

public static void main(String[] args) {
    int r =Integer.parseInt(args[0]);
  for(int u=1;u<=r;u++)
  { 
      for(int i=u;i>=1;i--)
    {
        System.out.print(i);
    }

    for(int i=2;i<=u;i++)
    {
        System.out.print(i);
    }
    System.out.println();
 }
}

output of this code looks-like this

     1
     212
     32123
     4321234

Thanks