在map中用put方法,放进去了,类的对象,整型,和字符串.读取的时候还是原来的类型吗,怎么读取.是菜鸟,详细说说 为什么序列化对象中的HashMap、HashSet或HashTable等集合不能包含对象自身的引用... 如果一个被序列化的对象中，包含有HashMap、HashSet或HashTable集合，则这些 ...

While the Hashtable was part of the initial Java release over two decades ago, the HashMap is the correct key-value store to use today. One key HashMap vs. Hashtable difference is the fact that the ...

Community driven content discussing all aspects of software development from DevOps to design patterns. Java collection classes allow a developer to keep track of contained items in one of two ways, ...