Java 集合框架

Java 集合框架

这个部分描述Java集合框架. 在这里, 你讲学习到集合框架是什么 ，它们如何让你的工作更容易并让你的编程更棒. 你将学习到这些核心元素 — 接口,实现， 集合操作,和算法 — 这些组成Java集合框架.



Introduction tells
you what collections are, and how they'll make your job easier and your programs better. You'll learn about the core elements that comprise the Collections Framework: interfaces, implementations andalgorithms.



Interfaces describes
the core collection interfaces, which are the heart and soul of the Java Collections Framework. You'll learn general guidelines for effective use of these interfaces, including when to use which interface. You'll also learn idioms for each interface
that will help you get the most out of the interfaces.


Aggregate
Operations iterate over collections on your behalf, which enable you to write more concise and efficient code that process elements stored in collections.



Implementations describes
the JDK's general-purpose collection implementations and tells you when to use which implementation. You'll also learn about the wrapper implementations, which add functionality to general-purpose implementations.



Algorithms describes
the polymorphic algorithms provided by the JDK to operate on collections. With any luck you'll never have to write your own sort routine again!


Custom
Implementations tells you why you might want to write your own collection implementation (instead of using one of the general-purpose implementations provided by the JDK), and how you'd go about it. It's easy with the JDK's abstract collection
implementations!



Interoperability tells
you how the Collections Framework interoperates with older APIs that predate the addition of Collections to Java. Also, it tells you how to design new APIs so that they'll interoperate seamlessly with other new APIs.