java - Common class for singleton -

java - Common class for singleton -

i writing programme in 12 classes need singleton, due using messaging service needs different types. question is, instead of re-create , pasting singleton code each creating instance changing class makes instance of. there someway have mutual code used singleton pattern, class needs create singleton?

here code create 1 of singletons,

public static void create() { if(instance == null) { instance = new foodatawriter(); } }

you have re-create , paste whatever code using implement singleton, according effective java (2nd edition, p.18) best way enforce singleton utilize one-element enum:

public enum mysingleton { instance; // methods }

if way there's nil re-create , paste!

java design-patterns singleton common-code