effective java, visualized

a companion to Bloch's 90 items: the idea, the bad version, the good version, and what changed since.

1. 01creating and destroying objectsitems 1–9: factories, builders, singletons, and not leaking.
2. 02methods common to all objectsitems 10–14: equals, hashCode, toString, clone, compareTo.
3. 03classes and interfacesitems 15–25: accessibility, immutability, composition, interfaces.
4. 04genericsitems 26–33: raw types, wildcards, and typesafe containers.
5. 05enums and annotationsitems 34–41: enums over ints, EnumSet, EnumMap, @Override.
6. 06lambdas and streamsitems 42–48: lambdas, method refs, and using streams judiciously.
7. 07methodsitems 49–56: validation, defensive copies, overloading, optionals.
8. 08general programmingitems 57–68: scope, libraries, floats, boxing, strings, naming.
9. 09exceptionsitems 69–77: when to throw, what to throw, and never ignoring them.
10. 10concurrencyitems 78–84: synchronization, executors, and thread safety docs.
11. 11serializationitems 85–90: mostly, don't. and if you must, use a proxy.