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Mostly asked coding question in product based company. concepts of maps and there implementation are being asked in many product based companies. What you will learn in this tutorials ? 1. How to sort map ? 2. How to sort Hash map ? 3. How to Sort map using its key ? 4. How to sort map using its value ? 5. Sort map using its key in ascending or descending order / alphabatically or alphabatically reverse order. These are the check your map concepts How to sort hashmap by it's key or value ?  what is hashmap? Hashmap is a data Structure to store value in for key and values Map<String, Integer> hmap = new HashMap<String,Integer> Steps to sort hashmap Solution in java:- github link:-  DataStructureAndAlgorithms/HashMapMain.java at master · pushpendragupta1993/DataStructureAndAlgorithms (github.com) Java code to sort hashmap by its value package com.training ; import java.util.ArrayList ; import java.util.Collections ; import java.util.Comparator ; import java.uti...