How to Sort a HashMap by Value in Java?

How to Sort a HashMap by Value in Java?

How to Sort HashMap by Value in Java. The value objects must implement Comparable interface or a custom Comparator to sort HashMap by value.

HashMap in java provides quick lookups. They store items in “key, value” pairs. To get a value from the HashMap, we use the key corresponding to that entry.

HashMaps are a good method for implementing Dictionaries and directories.

Key and Value can be of different types (eg – String, Integer).

We can sort the entries in a HashMap according to keys as well as values.

In this tutorial we will sort the HashMap according to value.

The basic strategy is to get the values from the HashMap in a list and sort the list. Here if the data type of Value is String, then we sort the list using a comparator. To learn more about comparator, read this tutorial.

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