1、Access restriction: The type JFrame is not accessible due to restriction on required library (2014-
http://blog.sina.com.cn/s/blog_6f901d670101ixyo.html
2、eclipse上安装使用Swing界面绘制插件WindowBuilder (该次用线上下载包)
https://blog.csdn.net/shouhouxinling/article/details/78892304
3、Launch configuration match references non-existing project match.(删除某个项目后编译路径一直变成那个已删项目的编译路径)
https://blog.csdn.net/llixiangjian/article/details/71512816?utm_source=blogxgwz6