Regular expression: check for the presence of special characters.

Question

I have the following requirement:
I need to check for the presence of the following characters in a keyword: @, #, > if any of these characters are present, then they need to be stripped off, before going further. Please let me know the regular expression to check for these characters.

Answer 1

I am trying to extend the same logic for the following characters:
.,‘“?!@#%^&*()-~<>[]{}\+=`©® . here is the code fragment:
Pattern kValidator = Pattern.compile("[\\.,\\‘\\“?!@#%^&*()-~<>[]{}\\+=\\`©®]");
Matcher kMatcher = kValidator.matcher(keyWord);
if (kMatcher.find(0)) {
keyWord = keyWord.replaceAll("[.,\\‘\\“?!@#%^&*()-~<>[]{}\\+=\\`©®]", " ");
}I get the following error. This error is from the weblogic command window. I dont understand these special characters.
Error:
28 Oct 2008 12:27:48 | INFO  | SearchController   | Exception while fetching search results in controller:Unclosed character class near index
39
[\.,\&#915;Çÿ\&#915;Ç£?!@#%^&*()-~<>[]{}\+=\`&#9516;&#8976;&#9516;«]
                                       ^
java.util.regex.PatternSyntaxException: Unclosed character class near index 39
[\.,\&#915;Çÿ\&#915;Ç£?!@#%^&*()-~<>[]{}\+=\`&#9516;&#8976;&#9516;«]
                                       ^
        at java.util.regex.Pattern.error(Pattern.java:1650)
        at java.util.regex.Pattern.clazz(Pattern.java:2199)
        at java.util.regex.Pattern.sequence(Pattern.java:1727)
        at java.util.regex.Pattern.expr(Pattern.java:1687)
        at java.util.regex.Pattern.compile(Pattern.java:1397)
        at java.util.regex.Pattern.<init>(Pattern.java:1124)
        at java.util.regex.Pattern.compile(Pattern.java:817)