2011-5-6漫谈设计模式（单例模式）
1.最简单的单例模式：
package com.singleton;public class LazyLoadSingleton {private static class LazyHolder{private static LazyLoadSingleton singletonInstance=new LazyLoadSingleton();}public static LazyLoadSingleton getInstance(){return LazyHolder.singletonInstance;}public static void main(String[] args){LazyLoadSingleton l1=LazyLoadSingleton.getInstance();LazyLoadSingleton l2=LazyLoadSingleton.getInstance();System.out.println(l1==l2);}}