importjava.util.Arrays;importjava.util.List;importjava.util.stream.Collectors;publicclassListFlatteningStream{publicstaticvoidmain(String[]args){List<List<Integer>>nestedList=Arrays.asList(Arrays.asList(1,2,3),Arrays.asList(4,5),Arrays.asList(6,7,8,9));List<Integer>flatList=flattenUsingStream(...
util.List; import java.util.stream.Collectors; public class ArrayListFlattenExample { public static void main(String[] args) { // 创建一个包含多个集合的ArrayList ArrayList<List<Integer>> listOfLists = new ArrayList<>(Arrays.asList( Arrays.asList(1, 2, 3), Arrays.asList(4, 5, 6), Arra...
List<String>flatList=newArrayList<>();for(Objectitem:nestedList){if(iteminstanceofList<?>){flatList.addAll(item)}else{flatList.add((String)item);}} 3. Using Streams TheJava Streams APIprovides us with some interesting methods on how to flatten nested linked lists. 3.1. UsingflatMap() We c...
@Test public void givenNestedList_thenFlattenImperatively() { List<String> ls = flattenListOfListsImperatively(nestedList); assertNotNull(ls); assertTrue(ls.size() == 8); assertThat(ls, IsIterableContainingInOrder.contains( "one:one", "two:one", "two:two", "two:three", "three:one", ...
用forEach扁平化List 为了将这个嵌套集合扁平化为一个字符串列表,可以将forEach与Java 8方法引用一起使用 public <T> List<T> flattenListOfListsImperatively( List<List<T>> nestedList) { List<T> ls = new ArrayList<>(); nestedList.forEach(ls::addAll); ...
valpersonList = listOf(Person("jack",22), Person("rose",25)) println(personList.maxBy{p:Person -> p.age })//标准写法println(personList.maxBy{it.age})//使用it来简化参数println(personList.maxBy(Person::age))//方法引用 上面使用了几种不同的写法来表述这个操作,这里选出标准写法 ...
flatten it into a simply list with integers. If the element i... YuriFLAG 0 301 Java中的List集合 2019-10-13 22:41 − 集合概述 为了在程序中保存数目不确定的对象,JDK中提供了一系列的特殊类,这些类可以存储任意类型的对象,并且长度可变,在Java中这些类被统称为集合。集合类都位于java.util包...
Given a nested list of integers, implement an iterator to flatten it. Each element is either an integer, or a list -- whose elements may also be integers or other lists. Example 1: Given the list[[1,1],2,[1,1]], By callingnextrepeatedly untilhasNextreturns false, the order of eleme...
(Arrays.asList(1,2,3),Arrays.asList(4,5),Arrays.asList(6,7,8));intsum=listOfLists.stream().flatMap(list->list.stream())// Flatten the list of lists.mapToInt(Integer::intValue)// Convert to IntStream.sum();// Calculate the sumSystem.out.println("Sum of all numbers: "+sum)...
<artifactId>flatten-maven-plugin</artifactId> <version>1.2.5</version> <configuration> </configuration> <executions> <execution> <id>flatten</id> <phase>process-resources</phase> <goals> <goal>flatten</goal> </goals> </execution>