无法在已经添加到我的项目中的jar中重新启动一个类

Question

As you can see from the pic, StdOut is a error for can't be resolved. But when I click it with holding Ctrl, I can still open the StdOut.class(Also in pic,you can see it) And StdOut class is in stdlib.jar which is in Referenced Libraries in left of pic. I just want to use StdOut.class. What should I DO?

Answer 1

尝试将jar添加为外部jar BuildPath＆gt;＆gt;配置BuildPath＆gt;＆gt; Libraries＆gt;＆gt;添加外部Jar 在使用之前，请尝试导入StdOut的完整路径。

Answer 2

我找到了一个愚蠢的解决方案：找到StdOut.class并从中复制内容，在我的项目中创建一个新包并粘贴它。虽然它很愚蠢，但这次StdOut.class可以解决（Eclipse可以解析我知道的包）。