用eclipse写java程序时,提示:Access restriction: The type JPanel is not accessible due to restriction on required library C:\Program Files (x86)\Java\jre1.8.0131\lib\rt.jar该怎么办呀?
我也有通过Project->Properties->Java build Path->Libraries->更改构建路径为rt.jar可是为什么还是会出现错误提示呢?程序调试又没问题...
更改路径: