effective java

Design method signatures carefully – effective java

Why prefer interfaces to abstract classes?

Obey the general contract when overriding equals in Java

Consider implementing comparable of a class in Java

Override clone judiciously in java

Always override tostring in java class

Always override hashcode when you override equals

Consider a builder when faced with many constructor parameters

Consider static factory methods instead of constructors

Prefer try-with-resources to try-finally in Java