·

4.186K

· eranation

tl;dr

if you have a Java class that has one of the old anti patterns of a singleton (first ask yourself why you need a singleton, but that's a different story)

all you need to do is from this

public class Foo {

 private Foo() {

 }

 public static Foo getInstance() {
 // whatever method you used before
 }

 //class body
}

to this

public enum Foo {
 INSTANCE;

 // class body

 // no need for private constructor
 // no need for getInstance, just use Foo.INSTANCE

}

And that's it.

http://stackoverflow.com/questions/70689/what-is-an-efficient-way-to-implement-a-singleton-pattern-in-java

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