Pattern 1 reverse number making in java

class Pattern2 {     public static void main(String[] args)     {         int i,j,k;         for(i=1;i<=4;i++)         {             for(j=i;j>=1;j--)             {                 System.out.print(j);             }             System.out.println();         }     } }

OUTPUT:         1         21         321         4321