I'm splitting each line to have the tweet content, and other information (date and time, which come in this form: "Tue, 08 May 2012 09:58:03 +0000"). So to use hours and minutes separately I need to split them again. Which I do in an array called tweet_info. If I access tweet_info works fine, if I access any other value (e.g. tweet_info) it gives me an ArrayIndexOutOfBoundsException (found something similar here, but I couldn't sort it out: https://forum.processing.org/topic/arrayindexoutofboundsexception).