In this article of HashMap performance Improvement Changes in Java 8, we will discuss an interesting change made in Java 8. The Oracle made this change in HashMap due to performance factor. The HashMap has frequently used map implementation for general purpose as we have discussed it in choosing the right map implementation in Java article. First of all, you must be aware of the internal implementation of the HashMap to understand this change in HashMap in Java 8. Also, we have looked at the LinkedHasHMap internal implementation and TreeMap internal implementation. HashMap in Java The HashMap class extends AbstractMap
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