Singleton in Java

Question

Is this singleton implementation OK in a multi threaded application given: there is no serialization, deserialization

public class NewSingleton {

    private static final NewSingleton RAJNI= new NewSingleton();

    private NewSingleton(){

    }

    public static NewSingleton getInstance() {
        return RAJNI;
    }    
}

There are at least a score of same question in SO , Browse through them. — AllTooSir, Jun 11 '13 at 18:06
Problem of this implementation is that instance will be created on class loading (first import of the class). — Toilal, Jun 11 '13 at 18:19

score 6 · Answer 1 · answered Jun 11 '13 at 18:07

6

This is fine if you make the class final but I prefer

public enum NewSingleton {
    INSTANCE;
}

as it is much simpler IMHO.

answered Jun 11 '13 at 18:07

Peter Lawrey

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Singleton in Java

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