Pergunta de entrevista da empresa Salesforce
Write thread safe singleton class
Resposta da entrevista
Sigiloso
14 de mar. de 2016
class Sigleton { private static volatile instance; public static Sigleton getInstance() { if(instance == null) { syncronized (Singleton.class) { if(instance == null ) { instance = new Sigleton(); } } } return instance; } }