Interpreting the output of splitting with white spaces

Question

How do we interpret the output of the flollowing execution

String s="   "  //3 white spaces
String arr[]=s.split(" ")   // output arr has no elements, same is the case on using \\s+ as the delimiter.

If we do the same in python, the op is ['' ,'' ,''] which is understood.

How does java split the above and why is there no element in arr ?

Answer 1

Per the documentation, "Trailing empty strings are therefore not included in the resulting array."

You may prefer to use s.split(" ", -1) if you want trailing empty strings.