If you've been doing Java development for a while, you've likely run into a situation where you need to Base64-encode or -decode something. It's used commonly in MIME documents, data URIs, and various other areas typically related to data transfer. Unfortunately, using Base64 in Java was awkward for a long time.
This is a companion discussion topic for the original entry at http://frostillic.us/blog/posts/2019/11/14/quick-tip-thursday-avoid-future-base64-trouble-in-java