Java 8 – 将 Stream 转换为 List

 一个Java 8 示例将向你展示怎样通过Collectors.toList把 一个 Stream 转换为一个 List 。

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

javapythonnode

另一个例子，过滤数字3后将其转换为List（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 -> x!= 3).collect(Collectors.toList());        result2.forEach(x -> System.out.println(x));    }}

output

1245

References

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