Java Singleton by Enum #enum #singleton #pattern #design

SingletonEnum.java

/* This program is free software. It comes without any warranty, to
* the extent permitted by applicable law. You can redistribute it
* and/or modify it under the terms of the Do What The Fuck You Want
* To Public License, Version 2, as published by Sam Hocevar. See
* http://www.wtfpl.net/ for more details. 
*/

public enum  EnumSingleton {
    INSTANCE;
    
    private int ;
    
    EnumSingleton(){
        value=5;
    }
    
    public void foobar(){}
}

EnumSingleton.INSTANCE.foobar();