$show=/label

Java 8 - Convert IntStream To List and Other

SHARE:

A quick guide on how to convert IntStream to List in java 8.

1. Overview

In this tutorial, We'll learn how to convert IntStream to List in java 8 and java 16 above versions.

IntStream is used to create the infinite streams in java 8 and it has the method to convert it to array using toArray() method.

But there are no other methods to directly convert it to List or set.

Conversion of IntStream to List can be done in two ways.

Java 8 - Convert IntStream To List and Other


2. Java 8 - IntStream to List or Set


In java 8 API, IntStream class has boxed() method. boxed() method converts the primitive int values into a stream of integer objects.

Once we get the Stream<Integer> instance then we can convert it to the List or Set or Map or any collection.

Example 1

package com.javaprogramto.java8.intstream.toList;

import java.util.LinkedList;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.IntStream;
import java.util.stream.Stream;

public class IntStreamToListExample {

	public static void main(String[] args) {

		IntStream evenIntStream = IntStream.iterate(0, i -> i + 2);

		Stream<Integer> stream = evenIntStream.limit(100).boxed();

		List<Integer> list = stream.collect(Collectors.toList());

		System.out.println("list size : " + list.size());

		IntStream evenIntStream2 = IntStream.iterate(0, i -> i + 2);
		
		Stream<Integer> stream2 = evenIntStream2.limit(100).boxed();

		List<Integer> linkedList = stream2.collect(Collectors.toCollection(LinkedList::new));

		System.out.println("linkedList size : " + linkedList.size());

	}
}

Output
list size : 100
linkedList size : 100


3. Java 16 - IntStream to List or Set


JDK 16 is added with the toList() method in Stream api. but the returned List is an unmodifiable list.

Example 2
import java.util.LinkedList;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.IntStream;
import java.util.stream.Stream;

public class IntStreamToListExample2 {

	public static void main(String[] args) {

		IntStream evenIntStream = IntStream.iterate(0, i -> i + 2);

		List<Integer> list = evenIntStream.limit(100).boxed().toList();

		System.out.println("list size : " + list.size());
	}
}


Output:
list size : 100

4. Conclusion


In this article, We've seen how to convert InstStream to Collection object in Java 8 and 16 versions.




COMMENTS

BLOGGER

About Us

Author: Venkatesh - I love to learn and share the technical stuff.
Name

accumulo,1,ActiveMQ,2,Adsense,1,API,37,ArrayList,18,Arrays,21,Bean Creation,3,Bean Scopes,1,BiConsumer,1,Blogger Tips,1,Books,1,C Programming,1,Collection,8,Collections,32,Collector,1,Command Line,1,Compile Errors,1,Configurations,7,Constants,1,Control Statements,8,Conversions,6,Core Java,135,Corona India,1,Create,2,CSS,1,Date,3,Date Time API,38,Dictionary,1,Difference,2,Download,1,Eclipse,3,Efficiently,1,Error,1,Errors,1,Exceptions,7,Fast,1,Files,17,Float,1,Font,1,Form,1,Freshers,1,Function,3,Functional Interface,2,Garbage Collector,1,Generics,4,Git,9,Grant,1,Grep,1,HashMap,2,HomeBrew,2,HTML,2,HttpClient,2,Immutable,1,Installation,1,Interview Questions,6,Iterate,2,Jackson API,3,Java,32,Java 10,1,Java 11,6,Java 12,5,Java 13,2,Java 14,2,Java 8,127,Java 8 Difference,2,Java 8 Stream Conversions,4,java 8 Stream Examples,12,Java 9,1,Java Conversions,14,Java Design Patterns,1,Java Files,1,Java Program,3,Java Programs,113,Java Spark,1,java.lang,4,java.util. function,1,JavaScript,1,jQuery,1,Kotlin,11,Kotlin Conversions,6,Kotlin Programs,10,Lambda,2,lang,29,Leap Year,1,live updates,1,LocalDate,1,Logging,1,Mac OS,3,Math,1,Matrix,6,Maven,1,Method References,1,Mockito,1,MongoDB,3,New Features,1,Operations,1,Optional,6,Oracle,5,Oracle 18C,1,Partition,1,Patterns,1,Programs,1,Property,1,Python,2,Quarkus,1,Read,1,Real Time,1,Recursion,2,Remove,2,Rest API,1,Schedules,1,Serialization,1,Servlet,2,Sort,1,Sorting Techniques,8,Spring,2,Spring Boot,23,Spring Email,1,Spring MVC,1,Streams,29,String,61,String Programs,28,String Revese,1,Swing,1,System,1,Tags,1,Threads,11,Tomcat,1,Tomcat 8,1,Troubleshoot,24,Unix,3,Updates,3,util,5,While Loop,1,
ltr
item
JavaProgramTo.com: Java 8 - Convert IntStream To List and Other
Java 8 - Convert IntStream To List and Other
A quick guide on how to convert IntStream to List in java 8.
https://1.bp.blogspot.com/-IZ_K975HAVk/YZ_ffY06IgI/AAAAAAAADjM/mSs-ocQMBeIkPyDKbCZHFJrf6d6rsKn_ACLcBGAsYHQ/w640-h438/Java%2B8%2B-%2BConvert%2BIntStream%2BTo%2BList%2Band%2BOther.png
https://1.bp.blogspot.com/-IZ_K975HAVk/YZ_ffY06IgI/AAAAAAAADjM/mSs-ocQMBeIkPyDKbCZHFJrf6d6rsKn_ACLcBGAsYHQ/s72-w640-c-h438/Java%2B8%2B-%2BConvert%2BIntStream%2BTo%2BList%2Band%2BOther.png
JavaProgramTo.com
https://www.javaprogramto.com/2021/11/java-intstream-to-list.html
https://www.javaprogramto.com/
https://www.javaprogramto.com/
https://www.javaprogramto.com/2021/11/java-intstream-to-list.html
true
3124782013468838591
UTF-8
Loaded All Posts Not found any posts VIEW ALL Readmore Reply Cancel reply Delete By Home PAGES POSTS View All RECOMMENDED FOR YOU LABEL ARCHIVE SEARCH ALL POSTS Not found any post match with your request Back Home Sunday Monday Tuesday Wednesday Thursday Friday Saturday Sun Mon Tue Wed Thu Fri Sat January February March April May June July August September October November December Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec just now 1 minute ago $$1$$ minutes ago 1 hour ago $$1$$ hours ago Yesterday $$1$$ days ago $$1$$ weeks ago more than 5 weeks ago Followers Follow THIS PREMIUM CONTENT IS LOCKED STEP 1: Share to a social network STEP 2: Click the link on your social network Copy All Code Select All Code All codes were copied to your clipboard Can not copy the codes / texts, please press [CTRL]+[C] (or CMD+C with Mac) to copy Table of Content