JAVA进阶

1Java线程的6种状态及切换

https://blog.csdn.net/pange1991/article/details/53860651/

2进程和线程的区别

https://www.cnblogs.com/lgk8023/p/6430592.html

3进程间如何通讯

https://blog.csdn.net/wh_sjc/article/details/70283843

4线程间如何通讯

https://blog.csdn.net/ls5718/article/details/51878770

5HashMap的数据结构是什么？如何实现的

https://www.cnblogs.com/dassmeta/p/5338955.html

6HashMap和HashTable有什么不同

http://www.cnblogs.com/xinzhao/p/5644175.html

7HashMap和ConcurrentHashMap有什么不同

https://javadoop.com/post/hashmap