Java 8 – 将Stream 转化为 List

这是一个Java 8 中，如何通过Collectors.toList方法将Stream转换到List的例子。

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

再举一个例子，过滤数字3并把这个流转换成一个列表。

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 -&gt; x!= 3).collect(Collectors.toList());

        result2.forEach(x -&gt; System.out.println(x));


    }
}

output

1
2
4
5

References

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

[Java 8 Collectors JavaDoc]: https://docs.oracle.com/javase/8/docs/api/java/util/stream/Collectors.html