split(",")); public static void main(String[] args) { // 分片处理 List<List<String>> newList = ListUtil.partition(OLD_LIST, 3); newList.forEach(i -> { System.out.println("集合长度:" + i.size()); }); } } 以上代码的执行结
List<List<T>> ListUtils::partition(List<T> list,intsize); List<List<Student>> lists = ListUtils.partition(students,2); 参考链接: Java 8 Streams API:对Stream分组和分区 How to sort a ArrayList in Java? 聚合 求和: intresult=Stream.of(1,2,3,4).sum();intresult=Stream.of(1,2,3,4)...
import java.util.List; public class ListPartitionExample { public static void main(String[] args) { List<Integer> originalList = Lists.newArrayList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10); int partitionSize = 3; List<List<Integer>> partitionedLists = Lists.partition(originalList, partition...
List<Integer> intList = Lists.newArrayList(1,2,3,4,5,6,7,8); List<List<Integer>> subSets = ListUtils.partition(intList,3); List<Integer> lastPartition = subSets.get(2); List<Integer> expectedLastPartition = Lists.<Integer> newArrayList(7,8); assertThat(subSets.size(), equalTo(3));...
(true,Arrays.asList(evenResult.get(0),evenResult.get(evenResult.size()-1)));}elseif(evenResult.size()==1){result.put(true,Arrays.asList(evenResult.get(0),evenResult.get(0)));// 如果只有一个元素,则最小值和最大值相同}else{result.put(true,Collections.emptyList());// 如果没有元素...
get(2); List<Integer> expectedLastPartition = Lists.<Integer> newArrayList(7, 8); assertThat(subSets.size(), equalTo(3)); assertThat(lastPartition, equalTo(expectedLastPartition)); } Commons Collections 没有相应的选项来对原始集合进行分区, 类似于 Guava Iterables.partition。 最后,同样的警告也...
List<Integer> expectedLastPartition = Lists.<Integer> newArrayList(7, 8); assertThat(subSets.size(), equalTo(3)); assertThat(lastPartition, equalTo(expectedLastPartition)); } 3. Use Guava to Partition a Collection Partitioning a Collectionis also possible with Guava: ...
Java 8 中的 Stream 是对集合(Collection)对象功能的增强,它专注于对集合对象进行各种非常便利、高效的聚合操作(aggregate operation),或者大批量数据操作 (bulk data operation)。Stream API 借助于同样新出现的 Lambda 表达式,极大的提高编程效率和程序可读性。
Areductionoperation (also called afold) takes a sequence of input elements and combines them into a single summary result by repeated application of a combining operation, such as finding the sum or maximum of a set of numbers, or accumulating elements into a list. The streams classes have mu...
Returns an infinite sequential orderedStreamproduced by iterative application of a functionfto an initial elementseed, producing aStreamconsisting ofseed,f(seed),f(f(seed)), etc. Stream<T>limit(long maxSize) Returns a stream consisting of the elements of this stream, truncated to be no longer...