what is the best method to create a singleton?

Question

The static inner class can guard against momory leak?

just because something is a static inner class doesn't make it a singleton. what's your point? — Stultuske, Jul 25 '16 at 06:24
Possible duplicate of [What is an efficient way to implement a singleton pattern in Java?](http://stackoverflow.com/questions/70689/what-is-an-efficient-way-to-implement-a-singleton-pattern-in-java) — Alex K, Jul 25 '16 at 07:46

score 0 · Accepted Answer · edited May 23 '17 at 12:08

According to Joshua Bloch's "Effective Java" book, the best (and maybe easiest) way to create a Singleton is to make a single-element enum:

public enum Singleton {
    INSTANCE;

    Singleton() { }
}

This way it's guaranteed that:

More info:

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