single-element enum type singletone with lazy loading capability

Question

I read many forums and posts about different style to implement single-tone pattern in java and seems \"Enum are the best way to implement singletone pattern in java\"!! I w

Answer 1

The first time a class is used, it gets loaded by the JVM and all of its static initialization is done. the enum members are static , so they're all going to be initialized.

Actually, classloader loads classes (sounds funny) only after you are accessing this classes first time. And only one reason to access enum-singleton class is to get it's instance.

That is why single-element enum type singletone in Java are called lazy - it's value is not initialized before you first time access it.

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