单例设计模式——readResolve()源码分析

https://blog.csdn.net/weixin_44804750/article/details/106124423?spm=1001.2101.3001.6650.2&utm_medium=distribute.pc_relevant.none-task-blog-2%7Edefault%7ECTRLIST%7ERate-2-106124423-blog-115823991.pc_relevant_paycolumn_v3&depth_1-utm_source=distribute.pc_relevant.none-task-blog-2%7Edefault%7ECTRLIST%7ERate-2-106124423-blog-115823991.pc_relevant_paycolumn_v3&utm_relevant_index=5