package net.kitbox.util;
/**
 *
 * @author lldy
 *
 */
public class Singleton {
    private Singleton(){
    }
    private static class SingletonHolder{
        private static Singleton  instance = new Singleton();
    }
    public static void method(){
        SingletonHolder.instance._method();
    }
    private void _method(){
        System.out.println("Singleton Method!");
    }
    public static void main(String[] args) {
        Singleton.method();
    }
}

Singleton.method();
//頻繁使用時比常見的 Singleton.getInstance().method()要省事