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Java 8 – Convert Stream to LinkedList

January 31, 2022 SJ Collection, Java 8 0

In this article, we will discuss how to convert Stream into a LinkedList in Java 1.8 version using Stream API

Stream to LinkedList :

  1. Using Collectors.toList()
  2. Using Collectors.toCollection()

1. Using Collectors.toList()

  • First, convert Stream to List using collect() method of Stream API by passing Collectors.toList() as input argument
  • Above conversion yields List and not LinkedList
  • For List to LinkedList conversion, create LinkedList object and pass above list as constructor-argument
  • Finally, print converted LinkedList elements to console

StreamToLinkedListUsingCollectorsToList.java

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package net.bench.resources.stream.to.list;
 
import java.util.LinkedList;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.Stream;
 
public class StreamToLinkedListUsingCollectorsToList {
 
    public static void main(String[] args) {
 
        // 1. Stream of String tokens
        Stream<String> nameStream = Stream.of(
                "Rajiv",
                "Anbu",
                "Santosh",
                "Abdul",
                "Lingaraj"
                );
 
 
        // 2. convert Stream<String> to List<String>
        List<String> names = nameStream.collect(Collectors.toList());
 
 
        // 3. List<String> to LinkedList<String>
        LinkedList<String> alNames = new LinkedList<String>(names);
 
 
        // 4. print to console
        System.out.println("Stream to LinkedList : \n\n" + alNames);
    }
}

Output:

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Stream to LinkedList :
 
[Rajiv, Anbu, Santosh, Abdul, Lingaraj]

2. Using Collectors.toCollection()

  • Convert Stream to LinkedList using collect() method of Stream API by passing Collectors.toCollection(LinkedList::new) as input argument directly
  • Print converted LinkedList elements to console

StreamToLinkedListUsingCollectorsToCollection.java

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package net.bench.resources.stream.to.list;
 
import java.util.LinkedList;
import java.util.stream.Collectors;
import java.util.stream.Stream;
 
public class StreamToLinkedListUsingCollectorsToCollection {
 
    public static void main(String[] args) {
 
        // 1. Stream of String tokens
        Stream<String> nameStream = Stream.of(
                "Rajiv",
                "Anbu",
                "Santosh",
                "Abdul",
                "Lingaraj"
                );
 
 
        // 2. convert Stream<String> to List<String>
        LinkedList<String> names = nameStream
                .collect(Collectors.toCollection(LinkedList::new));
 
 
        // 3. print to console
        System.out.println("Stream to LinkedList : \n\n" + names);
    }
}

Output:

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Stream to LinkedList :
 
[Rajiv, Anbu, Santosh, Abdul, Lingaraj]

Related Articles:

References:

Happy Coding !!
Happy Learning !!

Java 8 - Convert Stream to HashSet
Java 8 - Convert Stream to ArrayList

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