J-Fall 2023: Java Collections Puzzlers – Maurice Naftalin & Dmytro Vyazelenko

The Java Collections Framework is the most widely used API – probably in your application too. You use it all the time, but do you really know your way around it? You can be surprised even by common classes like ArrayList and HashMap, let alone by the handling of null values or immutability in lesser-known classes. In this interactive session, we’ll look at some obvious code and its less-than-obvious effect. You get to figure out and vote on the result, with this year a new contestant in the ring: GPT-4! So come and take part in a three-way battle of wits: it’s you against the Collections Framework and an annoying robot! Whoever wins, we’ll have fun, all will be explained, and you’ll end up knowing how to avoid pitfalls, both well-known and obscure, in using the Collections Framework.

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