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Java doesn't force you to do either of those, but it allows it, and doing so has been standard programming advice in Java for at least a decade. See item 13, "

by twic 5y ago

Java doesn't force you to do either of those, but it allows it, and doing so has been standard programming advice in Java for at least a decade. See item 13, "Favor immutability", in Effective Java, the bible of Java programming, published in 2001: https://www.pascal-man.com/navigation/faq-java-browser/java-concurrent/Effective_Java.pdf https://www.pascal-man.com/navigation/faq-java-browser/java-... I can't find a concrete citation for "makes illegal states unrepresentable" (does anyone know the history of this phrase?), but it was certainly part of conversations i was having in 2012.

bachmeier 5y ago
> Java doesn't force you to do either of those, but it allows it, and doing so has been standard programming advice in Java for at least a decade. "You can do that" and "enforced by the compiler by default" are pretty different.
marshray 5y ago
"Make illegal states unrepresentable" is usually attributed to Yaron Minsky of Jane Street. This video shows it at 28:02. https://blog.janestreet.com/effective-ml-video/ https://blog.janestreet.com/effective-ml-video/ https://www.youtube.com/watch?v=-J8YyfrSwTk https://www.youtube.com/watch?v=-J8YyfrSwTk