Following in the vein of "Java Hiccups", I've had a couple things floating around my head lately that I think collectively make for a good post for Java developers, particularly those working in the Domino arena. Without further ado: Map#computeIfAbsent. This is a method that was added in Java 8 and, while it's not as big a deal as the addition of streams, it's one of my favorite additions and something I use very frequently.