regex - Java detect special characters in a string -

i use regex

r="[^a-za-z0-9]+";  

to detect if string has 1 or more chars other letters , digits;

then tried following:

pattern.compile(r).matcher(p).find(); 

i tested:

! @ # $ % ^ & * ( ) +  =- [ ] \ ' ; , . / { } | " : < > ? ~ _ ` 

most of time, works except backsplash \ , caret ^.

e.g.

string p = "abcasd10^"    (return false) string p = "abcasd10\\"   (return false)  

anything miss?

the following code prints "found: true" when compile , run it:

class t {     public static void main (string [] args)     {         string thepattern = "[^a-za-z0-9]+";          string theinput = "abskkel35^";         boolean isfound = pattern.compile(thepattern).matcher(theinput).find();         system.out.println("found: " + isfound);     } } 

not sure why see different result...