Course Intermediate 10914
Course Introduction:"Self-study IT Network Linux Load Balancing Video Tutorial" mainly implements Linux load balancing by performing script operations on web, lvs and Linux under nagin.
Course Advanced 16845
Course Introduction:"Shangxuetang MySQL Video Tutorial" introduces you to the process from installing to using the MySQL database, and introduces the specific operations of each link in detail.
Course Advanced 10561
Course Introduction:"Brothers Band Front-end Example Display Video Tutorial" introduces examples of HTML5 and CSS3 technologies to everyone, so that everyone can become more proficient in using HTML5 and CSS3.
java - hashmap put method problem
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2017-06-15 09:22:32 0 1 861
How to send json data to kafka using Java
2017-05-17 10:05:08 0 1 1144
Course Introduction:The following is a detailed analysis and introduction of the differences between HashMap, Hashtable and HashSet in Java. Friends in need can come and refer to it.
2017-01-19 comment 0 1695
Course Introduction:In the previous blog post (java improvement part (23) -----HashMap), the implementation process of HashMap was explained in detail. For HashSet, it is implemented based on HashMap, and the bottom layer uses HashMap to save elements. So if you are familiar with HashMap, then HashSet is so easy!!
2017-02-10 comment 0 1134
Course Introduction:Overall introduction The reason why HashSet and HashMap are explained together is because they have the same implementation in Java. The former only wraps the latter, which means that there is a HashMap (adapter mode) in HashSet. Therefore, this article will focus on analyzing HashMap. HashMap implements the Map interface and allows null elements to be put in. Except that this class does not implement synchronization, the rest is roughly the same as Hashtable. Unlike TreeMap, this container does not guarantee the order of elements. The container may re-hash the elements as needed. The order will also be retyped..
2017-03-28 comment 0 1536