"-Google-Guava" - 1 õppematerjal

Google Guava

Google Guava Margus Martsepp  History Java collections was created in 1997 3 big ideas: · interfaces (define collections) · implementations (concrete or abstract) · algorithms (to manipulate collections) Basic idea around this framework: Extensible - people can build on it  Overview 1. Utilities - {static constructors,functional - {predicates, transform}} 2. Objects {equal, coalesce, ComparisonChain} 3. Immutable - {why, how, collections}  Utilities - static constructors Create a list of 2 elements  Utilities - functional - predicates Apply predicates on collections/iterables Functional language equivalent  Utilities - functional - transform Create a transformed view of a collection  Object - {equals, coalesce} Equals (null safe) Coalesce Objects.firstNonNull(obj, default)  Object - ComparisonChain CompareTo method:  Immutable - why Why? · + Your life is easy (no trust problems) · + Free thread safety · + Can be...