String.trim() function

Question

what the trim function actually does ?? I'm new to java someone explain please

Answer 1

If you have spaces before and/or after the string, this function will remove them.

this string... - " Do I have spaces before and after me? "
... will become - "Do I have spaces before and after me?"

Answer 2

It gets rids of spaces before and after the string (leading and trailing). It returns the new string.