Op solved it closing ~~

when executed assertEquals(Groups.groupCheck("({"), false); output gives expected: but was:...how??

n%n is always 0 ;-)

i worte the same code but i used if(n==0||n%n==0) return 0; i was not getting output any idea why

Great!

Yes I could. Thanks!

Does it work now?

thanks...

Check for null before...

if(numbers == null)
{
  return new double[0];
}

As first call in the method.

i changed the poisition of line and i got.but how to handle null pointer exception???

numbers.length can be zero, so you can't create an array like new double[numbers.length-1] because numbers.length-1 may be negative.

Could you finish the kata now?

What is the text of the error?

And please paste your code here (mark as spoiler!).