Eclipse下导入第三方jar无法调用！

Question

急救！Eclipse下导入第三方jar，jar中的类无法调用，也无法查看源代码。之前看网上说是添加中文语言包搞的，我这个可以排除这个原因，因为用的是原生英文版，截图在此，奇怪的是虽然无法查看类的源代码，但是Eclipse右侧却能吧类中的方法变量都显示出来，请看图！

Answer 1

It has nothing to do with language. The jar you quoted is compiled into a class, and the source code cannot be viewed. A general open source program jar has two packages, one of which is generally named xxx_src.jar. This is the source code package, which contains java files. Your package is a class file.