TheServerSide

How a Java HashMap internal implementation works

A frequently asked question in a Java interview is: How to implement a Java HashMap? Java job seekers must fully grok this important concept if they want to ace the interview. The HashMap tutorial ...
GitHub

HashMap$Node cannot be cast to class java.util.HashMap$TreeNode

Caused by: java.lang.ClassCastException: class java.util.HashMap$Node cannot be cast to class java.util.HashMap$TreeNode (java.util.HashMap$Node and java.util.HashMap ...
TheServerSide

HashMap vs. Hashtable: Which map should you choose?

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 ...
GitHub

CTD HashMap error at RuinsMod.onEntityEnteringChunk -- may be template related

I'm seeing intermittent CTDs using MC 1.9/Forge 1.9 - 12.16.0.1816 and the logs are blaming Ruins (although it could be an intermod conflict since I have other mods) -- I have gone back and forth on ...
InfoWorld

Cannot Assume Serializability for Java Map’s Nested Classes

A colleague of mine recently ran into an issue that I have not run into myself, but found to be interesting and, in my opinion, worth blogging about here. During some distributed Java development, my ...
InfoWorld

Java Map.get and Map.containsKey

package dustin.examples; /** * Enum representing select western states in the United Sates. */ public enum States { ARIZONA("Arizona"), CALIFORNIA("California ...