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 ...
GitHub

alkabharti/HashMap-LinkedHashMap-and-TreeMap-in-Java

All of these cannot be used to store duplicates. We cannot have multiples values for a single key, and just in case we have 2 values then the hashtable will store the latest value for that particular ...
GitHub

HashMap vs. TreeMap vs. Hashtable vs. LinkedHashMap.md

如果HashMap的键(key)是自定义的对象，那么需要按规则定义它的equals()和hashCode()方法。 class Dog { String color; Dog(String c) { color = c ...
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 ...