java project前面有一个红色叹号解决方法
2017-05-14 21:25 backyyan 阅读(1704) 评论(0) 编辑 收藏 举报右击有红色叹号的java project Build path>>Configure Build Path
Resource >> java build path Libaries 点击如下图所示的JRE System ....点击右边的remove
删除后,再点击add library
点击jre system library >>next
finish>>ok