一道关于ClassLoader的面试题解决办法

一道关于ClassLoader的面试题
请看如下代码, 先不要运行, 说出程序会输出什么?

Java code

import java.net.*;public class Andromeda {    private static final Andromeda instance = new Andromeda();        private Andromeda(){            }        public static Andromeda getInstance(){        return instance;    }        public static void main(String[] args) throws Exception{                URLClassLoader loader1 = new URLClassLoader(new URL[]{new URL("file:///home/root/workspace/andromeda/bin/")}){            public String toString(){                return "loader1";            }        };                URLClassLoader loader2 = new URLClassLoader(new URL[]{new URL("file:///home/root/workspace/andromeda/bin/")},                 ClassLoader.getSystemClassLoader().getParent()){            public String toString(){                return "loader2";            }        };        Class clazz1 = loader1.loadClass("Andromeda");        Class clazz2 = loader2.loadClass("Andromeda");                Andromeda obj1 = (Andromeda)(clazz1.getDeclaredMethod("getInstance", new Class[0]).invoke(null, new Object[0]));        System.out.println(loader1 + " loads " + obj1);                Andromeda obj2 = (Andromeda)(clazz2.getDeclaredMethod("getInstance", new Class[0]).invoke(null, new Object[0]));        System.out.println(loader2 + " loads " + obj2);                Andromeda obj3 = Andromeda.getInstance();        System.out.println(Andromeda.class.getClassLoader() + " loads " + obj3);    }}