[자바] 싱글톤 구현 코드..

일반적인 싱글톤 구현 코드~!

public class Singleton {

        // Private constructor prevents instantiation from other classes

        private Singleton() { }

  

        /**

        * SingletonHolder is loaded on the first execution of Singleton.getInstance()

        * or the first access to SingletonHolder.INSTANCE, not before.

        */

        private static class SingletonHolder {

                public static final Singleton instance = new Singleton();

        }

  

        public static Singleton getInstance() {

                return SingletonHolder.instance;

        }

}

** 빌 퍼그의 방법 The solution of Bill Pugh **