不使用synchronized和lock,如何实现一个线程安全的单例?
转载:https://blog.csdn.net/singwhatiwanna/article/details/104568025?utm_medium=distribute.pc_relevant.none-task-blog-baidujs_title-0&spm=1001.2101.3001.4242
转载:https://blog.csdn.net/singwhatiwanna/article/details/104568025?utm_medium=distribute.pc_relevant.none-task-blog-baidujs_title-0&spm=1001.2101.3001.4242