importjava.util.Arrays;importjava.util.List;importjava.util.stream.Collectors;classAddress{Stringstreet;Address(Stringstreet){this.street=street;}publicStringgetStreet(){returnstreet;}}classUser{Stringname;List<Address>addresses;User(Stringname,List<Address>addresses){this.name=name;this.addresses=addresse...
将多个集合合并为一个流: importjava.util.Arrays;importjava.util.List;importjava.util.stream.Collectors;importjava.util.stream.Stream;publicclassFlatMapExample{publicstaticvoidmain(String[] args){List<Integer> list1 =Arrays.asList(1,2,3);List<Integer> list2 =Arrays.asList(4,5,6);List<Integer...
接下来,我们创建一个flatMap操作来处理用户列表中的空值: import java.util.Arrays; import java.util.List; import java.util.stream.Collectors; import java.util.stream.Stream; public class FlatMapExample { public static void main(String[] args) { List<User> users = Arrays.asList( new User("Alic...
1. Stream + String[] + flatMap 1.1 The below example will print an empty result, because filter() has no idea how to filter a stream of String[]. TestExample1.java package com.mkyong.java8; import java.util.Arrays; import java.util.stream.Stream; public class TestExample1 { public s...
importjava.util.Arrays;importjava.util.List;importjava.util.stream.Collectors;// 创建一个学生类classStudent{Stringname;List<String>courses;Student(Stringname,List<String>courses){this.name=name;this.courses=courses;}List<String>getCourses(){returncourses;}}// 主程序入口publicclassFlatMapExample{publi...
importjava.util.Arrays;importjava.util.List;importjava.util.stream.Collectors;publicclassFlatMapExample{publicstaticvoidmain(String[] args){// 创建一个包含多个数据集的列表List<List<String>> datasets =Arrays.asList(Arrays.asList("A","B","C"),Arrays.asList("D","E","F"),Arrays.asList("...
importjava.util.ArrayList;importjava.util.Arrays;importjava.util.List;importjava.util.stream.Collectors;importjava.util.stream.Stream;publicclassFlatMapExample{publicstaticvoidmain(String[] args){// 创建一个包含多个列表的列表List<List<String>> nestedList =Arrays.asList(Arrays.asList("A","B"),Arr...
简单的Java flatmap操作示例 假设我们有一个 List<List<Integer>>,我们想要将其扁平化为一个 List<Integer>: java import java.util.Arrays; import java.util.List; import java.util.stream.Collectors; public class FlatMapExample { public static void main(String[] args) { List...
Java8 stream flatMap example mapmethod is used to handle the element of stream and output the stream.flatMapmethod is used to handle multiple stream and output new stream. Here is some easy examples. 1. show all characters in List Every word in list will generate its own stream by ...
Words:[Java,is, powerful, Stream, API,is, useful, flatMap,is, amazing] 3.处理多对多关系 (One-to-Many) 用法 通过映射关系生成多个结果,并将其合并为单一流。 示例代码 importjava.util.*;importjava.util.stream.Collectors;publicclassOneToManyExample{publicstaticvoidmain(String[] args){ ...