Collections and ConcurrentModificationExceptions

Unmodifiable collections can STILL throw ConcurrentModificationExceptions

Please remember this and use CopyOnWriteArrayList instead.

Exception StackTrace to String

How many times have I forgotten this:

            StringWriter sw = new StringWriter();
            PrintWriter pw = new PrintWriter(sw);
            e.printStackTrace(pw);
            String result = sw.toString();

While we are at it: InputStream to String:

            final StringWriter writer = new StringWriter();
            IOUtils.copy(urlConnection.getInputStream(), writer);
            result = writer.toString();

http://stackoverflow.com/questions/309424/in-java-how-do-a-read-an-input-stream-in-to-a-string