摘要:
package test; public class Singleton { private Singleton() { }; private static Singleton single = null; public static Singleton getInstance() { if (nu 阅读全文
摘要:
转自:http://blog.csdn.net/gwblue/article/details/10363967 作者:David链接:https://www.zhihu.com/question/37962386/answer/87758781来源:知乎著作权归作者所有。商业转载请联系作者获得授权, 阅读全文