如何在Java 8的stream collect()中理解参数 [英] How is the argument understood at streams collect() in java 8

问题描述

Map<Currency, List<Transaction>> transactionsByCurrencies =transactions.stream().collect(groupingBy(Transaction::getCurrency));

尝试了解Java-8概念！

Tyring to understand java-8 concepts!

groupingBy在这里已简单引用.那是常规方法还是静态方法或lambda传递?

groupingBy has been simply referred here. Is that a regular method or static method or lambda passing ?

编译器如何理解groupingBy方法?

推荐答案

groupingBy是Collectors类的static方法.

要在没有类名前缀的情况下引用它，您需要添加适当的import语句.

In order to refer to it without the class name prefix, you need to add the proper import statement.

这篇关于如何在Java 8的stream collect()中理解参数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！