java-8

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...

英文: Sort object list based on custom object as one of field 问题 Sure, here's the translated code part...

英文: How to create a key combination of Map from a list in Java Streams 问题 我有一个 User 对象的列表，我想将其转换为一个 ...

英文: Get String from List of Maps in Java 8 问题 我有：List<Map<String, String>> countries，我能够...

英文: What is the main difference between using inheritance and polymorphism to instantiate of an obje...

英文: I am trying to find the Salary of the Newest Employee for every Department. Using java 8 in a si...

英文: Return lazy evaluation of list of boolean statements , with any of it true 问题 有一系列布尔决策，每个决策都有不同的...

英文: Sorting and storing number in hashmap 问题 我需要在以下情况下寻求您的帮助。 我会在列表中拥有从1到100,000的任意数字。我需要将这些数字分成10组。...

英文: Why ArrayList.addAll(...) doesn't check the given colleciton for nonempty? 问题 我们发现ArrayList....

英文: Parameter a class with type A or B 问题 我正在尝试为一个类参数化一个类型，该类型只能是 A 或者 B，不能是其他任何类型。 类似于： final class...