How To Convert A Map To A Listing Inwards Coffee Example

Map as well as List are 2 mutual information structures available inwards Java as well as inwards this article nosotros volition run across how tin nosotros convert Map values or Map keys into List inwards Java. The primary deviation betwixt Map (HashMap, ConcurrentHashMap or TreeMap) as well as List is that Map holds 2 objects fundamental as well as value spell List but holds 1 object which itself is a value. Key inwards hashmap is but an addon to notice values, thus y'all tin but alternative the values from Map as well as practice a List out of it. The map inwards Java allows duplicate value which is fine amongst List which too allows duplicates but Map doesn't allow duplicate key.

How to Convert Map into List inwards Java amongst Example

Map to List Example inwards Java

Here are few examples of converting Map to List inwards Java. We volition run across outset how to convert hashMap keys into ArrayList as well as and thus hashMap values into ArrayList inwards Java.

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map.Entry;

/**

*Converting HashMap into ArrayList inwards Java

public degree MaptoListJava {

populace static void main(String... args) {

HashMap<String, String> personalLoanOffers = novel HashMap<String, String>();

// preparing hashmap amongst keys as well as values

personalLoanOffers.put("personal loan past times DBS", "Interest charge per unit of measurement low");

personalLoanOffers.put("personal loan past times Standard Charted", "Interest charge per unit of measurement low");

personalLoanOffers.put("HSBC personal loan past times DBS", "14%");

personalLoanOffers.put("Bankd of America Personal loan", "11%");

System.out.println("Size of personalLoanOffers Map: " + personalLoanOffers.size());

//Converting HashMap keys into ArrayList

List<String> keyList = novel ArrayList<String>(personalLoanOffers.keySet());

System.out.println("Size of Key listing from Map: " + keyList.size());

//Converting HashMap Values into ArrayList

List<String> valueList = novel ArrayList<String>(personalLoanOffers.values());

System.out.println("Size of Value listing from Map: " + valueList.size());

List<Entry> entryList = novel ArrayList<Entry>(personalLoanOffers.entrySet());

System.out.println("Size of Entry listing from Map: " + entryList.size());

}

Output:

Size of personalLoanOffers Map: 4

Size of Key listing from Map: 4

Size of Value listing from Map: 4

Size of Entry listing from Map: 4

Map as well as List are 2 mutual information structures available inwards Java as well as inwards this article nosotros volition How to Convert a Map to a List inwards Java Example

That's all on Map to List Conversion inwards Java , every bit y'all seen inwards in a higher house event y'all tin practice a dissever listing for both keySet as well as values Collection inwards Java. permit me know if y'all know whatever other means except beast forcefulness means of going through each chemical cistron of Map as well as copying into List.

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