Jonathan Lalou's blog

Posts Tagged ‘Dolphin’

Dolphin extends the switch operator to String

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Tiger (Java 5) introduced new syntax, among which generics are the most used. Mustang (Java 6) did not offer anything new. Dolphin (Java 7) will introduce a new scheme, the “diamond syntax”. We deal of diamond because of the look of theses characters: “<>”

To sum up quickly, in Java 5 we have to write:

List<Integer>  myList = new ArrayList<Integer>()
Map<String, List<Double>> myMap = new Hashmap<String, List<Double>>();

On last Dolphin development releases, we can simply write:

Lis<Integer> myList = new ArrayList<>()
Map<String, List<Double>> myMap = new Hashmap<>();

There’s nothing revolutionary, but developpers will save a little more time ;-).