Fastest Map In Java

Now, let’s see how to perform a few frequently used operations on a map using the widely used hashmap class.and also, after the introduction of generics in java 1.5, it is possible to restrict the type of object. But i struggle to make sense of many of these numbers. If this map permits null values, then a return value of null does not necessarily indicate that the map contains no mapping for the key;

In the jdk, java.util.map is an interface that includes method signatures for insertion, removal, and retrieval. The problem with using concurrenthashmap is that it is heavy weight for a small collection i.e. The benchmark gave the following result (less is better):

It's also possible that the map explicitly maps the key to null.

Now, let’s see how to perform a few frequently used operations on a map using the widely used hashmap class.and also, after the introduction of generics in java 1.5, it is possible to restrict the type of object. Singleshottime this mode allows measuring the time of single operation from it's beginning to the end. What's the data structure in java that has the fastest operation for contains() ? Yet, if we don't pay attention to details, it can get suboptimal.