Number Pattern 8 by while loop

CODE BOX
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/*program to print star pattern square box by while loop

  5
  54
  543
  5432
  54321

*/

class npat8w
{
public static void main(String a[])
{
int n,i,j;
n=Integer.parseInt(a[0]);
i=n;
while(i>=1)
{j=n;
        while(j>=i)
        {
        System.out.print(j);
        j--;
 }

System.out.print("\n");
i--;
}
}
}