java类声明< T> [英] java class declaration <T>
问题描述
我熟悉简单的类声明 public class test 但我不明白 public class test< T> 。
I'm familiar with simple class declaration public class test but I don't understand public class test<T>.
推荐答案
< T>指的是泛型类型。
Java中引入了泛型类型，以便为您提供编译时间，并且由于类型擦除（类型安全性），这非常重要。
它在Collections中特别有用，因为它可以让你免于手动转换。
< T > refers to a generic type. Generic types are introduced in Java to provide you with compile time, and this is important due to type erasure, type-safety. It's especially useful in Collections because it frees you from manual casting.
阅读更多关于泛型的知识，特别是关于主题的文档， Angelika Langer非常好： http://www.angelikalanger.com/GenericsFAQ/JavaGenericsFAQ.html
It is a good idea to read more on generics, especially the documentation on the topic by Angelika Langer is very good: http://www.angelikalanger.com/GenericsFAQ/JavaGenericsFAQ.html
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