I have a GUI with a JPassword field named pswrd. When I read the entered password I save it in a String named password and trim to get out leading and trailing empty spaces (user pressed the space bar).
to check that the empty spaces are gone, they never are. Why, and what can I do about it? Thanks!
Joined: Jun 23, 2003
This is a standard mistake when working with Strings. Strings are immutable, meaning they do not change. The syntax "password.trim();" does nothing to the original String, it simply returns a NEW String with the spaces trimmed off. The following modification will work: password = password.trim(); Hope this helps. Joe
Joined: Feb 18, 2003
Hello, Hope this too clarify the answer, according to the API specification of the String class, trim() Returns a copy of the string, with leading and trailing whitespace omitted. Important thing to note here is that, it returns a String. Better check the API if you get similar problems. Cheers...........
SCJP 1.4, SCMAD 1.0<br />SCWCD, SCBCD (in progress)
Joined: Aug 28, 2002
String in Java is immutable. So you can't change it instead get the new trimmed String.
Joined: Feb 07, 2002
Oh geez! I really should have seen that... Thanks ya'll, Elouise