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Searching a string for a single character - how to?
I can't use the 'at' symbol because these forums restrict it, so I'll replace the at symbol with &.
I'm trying to search a string for the "&" character but it seems as though my regex is not working..
Here is what I have:
CharSequence cs = ".*&.*"; CharSequence cs2 = ".*&a-b.c.d"; boolean csRet = users[i].contains(cs); //Currently everything returns false. if (!csRet) { users[i] += "&a-b.c.d"; } boolean csCraRet = users[i].contains(cs2); if (cs2Ret) { //Do stuff }
Related threads:
Re: Searching a string for a single character - how to?
See the API for the contains method you are using (I am guessing 'users' is an array of String objects) - does it use regular expressions?
Re: Searching a string for a single character - how to?
Contains searches for exact Strings, not regexes.
String does have a "matches" method which accepts regexes, but it checks the ENTIRE String. There are two ways around this:
1. Add a wildcard to the front and back of your regex and use String.matches(String regex) method (you need to add a wildcard to account for additional text before and after the regex).
2. Use the Pattern and Matcher classes instead:
Pattern p = Pattern.compile(regex_pattern); // Creates a new Pattern object with the specified regex Matcher m = p.matcher(inputString); // Creates a new Matcher object from the Pattern, with the String you are wanting to search boolean exists = m.find(); // Returns true if the regex pattern is found in the String
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