Java string.split（）约定

Question

I'm using the following line of code in my program to get the first part of a string.

struct.trailing.split(" ")[0]

For example, the string "Dogs and cats" would return "Dogs" with this line of code. Is what I wrote convention? I tried this at random and it worked, piquing my curiosity,

Answer 1

StringTokenizer also can be used
StringTokenizer st2 = new StringTokenizer(str, " ");
do the same.