java - 显示导入包的名称，但被划掉

Question

我将 xercesImpl.jar 导入到我的 Android 项目中。

当我使用它时它似乎能识别它(即列出所有可用的方法)，但名称被划掉了。有谁知道这是为什么吗？

Answer 1

因为该类或其方法是@Deprecated .

The @Deprecated annotation indicates that the marked element is deprecated and should no longer be used. The compiler generates a warning whenever a program uses a method, class, or field with the @Deprecated annotation. When an element is deprecated, it should also be documented using the Javadoc @deprecated tag, as shown in the following example. The use of the "@" symbol in both Javadoc comments and in annotations is not coincidental—they are related conceptually. Also, note that the Javadoc tag starts with a lowercase "d" and the annotation starts with an uppercase "D".

http://docs.oracle.com/javase/tutorial/java/javaOO/annotations.html