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 static void main(String[] args) { ...
In order to show all possible pairs we need handle every item of numbers2 in the stream of number1. There are multiple stream when invokenumber2.stream()method. So we needflatMapto handle multiple stream and put the result in a new stream. List<Integer>numbers1=Arrays.asList(1,2,3);...
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<String> input = Arrays.asList("1", "2", "three", "4", "five"); try { List<Integer> resu...
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...
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> list3 =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...
import java.util.Arrays; import java.util.List; public class FlatMapExample { public static void main(String[] args) { List<String> words = Arrays.asList("hello", "world", "java"); words.stream() .flatMap(word -> Arrays.stream(word.split(""))) ...
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...
import java.util.stream.Collectors; public class FlatMapExample { public static void main(String[] args) { List<String> strings = Arrays.asList("hello", "world"); // 正确的用法 List<String> result = strings.stream() .flatMap(s -> Arrays.stream(s.split(""))) ...