摘要:
转载自:http://www.importnew.com/7099.html HashMap的工作原理是近年来常见的Java面试题。几乎每个Java程序员都知道HashMap,都知道哪里要用HashMap,知道Hashtable和HashMap之间的区别,那么为何这道面试题如此特殊呢?是因为这道题考... 阅读全文
摘要:
“Long is a class. long is a primitive. That means Long can be null, where long can't. Long can go anywhere that takes an Object, long can't (since... 阅读全文