IDEA提示编译错误：Idea illegal character: \65279

https://github.com/Damao/Intellij-IDEA-F2E/blob/master/FAQ/%E9%97%AE%E9%A2%98%E9%9B%86%E5%90%88/Eclipse%E9%A1%B9%E7%9B%AE/IDEA%E7%BC%96%E8%AF%91%E5%87%BA%E9%94%99.md

解决方法是将提示编译报错的文件,将file encodings由utf-8改成utf-16,再将utf-16改成utf-8就好了