Java 8 – Convert a Stream to List

Datetime:2016-08-23 00:35:02          Topic: Java8           Share

A Java 8 example to show you how to convert a Stream to a List via Collectors.toList

Java8Example1.java

package com.mkyong.java8;

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

public class Java8Example1 {

    public static void main(String[] args) {

        Stream<String> language = Stream.of("java", "python", "node");

        //Convert a Stream to List
        List<String> result = language.collect(Collectors.toList());

        result.forEach(System.out::println);

    }
}

output

java
python
node

Yet another example, filter a number 3 and convert it to a List.

Java8Example2.java

package com.mkyong.java8;

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

public class Java8Example2 {

    public static void main(String[] args) {

        Stream<Integer> number = Stream.of(1, 2, 3, 4, 5);

        List<Integer> result2 = number.filter(x -> x!= 3).collect(Collectors.toList());

        result2.forEach(x -> System.out.println(x));


    }
}

output

References

  1. Java 8 Streams filter examples
  2. Java 8 Collectors JavaDoc




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