java-stream

英文: converting foreach to filter 问题 我想将代码从这样： List<FlightPositionRoute> flightPositionRoutes =...

英文: Socket is closed after reading from it's InputStream 问题 Method to send message to peer: publ...

英文: How to flatten a map inside a list? 问题 import java.util.*; import java.util.stream.Collectors; L...

英文: How to group a object list into a map and select the first object of different type for each key...

英文: Run a For-each loop on a Filtered HashMap 问题 我对Java非常陌生。这是我的问题。 我有一个类型为 `Map<Integer, List<...

英文: groupingBy in Streams with CollectingAndThen method -> how to get rid of Optional then use Ma...

英文: Check if an arraylist contains two strings 问题 我有一个类似下面的POJO类 public class CategoryModel { public...

英文: Why does Stream.Builder have both add and accept methods? 问题 我正在使用 Stream.Builder，并且我偶然发现这个接口有两个...

英文: Getting compile time error Inference variable T has incompatible bounds 问题 class CollectorUtils ...

英文: What is the best way to combine 2 or more fields as a Key in a Map, using Java 8? 问题 我一直面临多个需求，需...