在框架内部的重要重构使用了泛型集合类代替非泛型的集合性。
Major refactoring internally to use generic collections instead of the non generic types.
通配符在类型系统中具有重要的意义，它们为一个泛型类所指定的类型集合提供了一个有用的类型范围。
Wildcards play an important role in the type system; they provide a useful type bound for the family of types specified by a generic class.
泛型类最常用于集合，如链接列表、哈希表、堆栈、队列、树等。
The most common use for generic classes is with collections like linked lists, hash tables, stacks, queues, trees, and so on.
集合，泛型，时间类的介绍。
An Introduction to Collections, Generics, and the Timing Class.
通过创建泛型类，您可以创建一个在编译时类型安全的集合。
By creating a generic class, you can create a collection that is type-safe at compile-time.
通过创建泛型类，您可以创建一个在编译时类型安全的集合。
By creating a generic class, you can create a collection that is type-safe at compile-time.
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