转载博客：https://blog.csdn.net/gengjianchun/article/details/78679036

　　　　   https://blog.csdn.net/jsloveyou/article/details/53908932

项目右键->buildPath configure Build Path->点击选项卡Libraries->选中JRE System Library->点击edit->选中Alternate JRE->选择jdk->点击finish，点击ok具体原因未知，

有知道的帮我留个言，谢谢

转载于:https://www.cnblogs.com/hl-spring/p/9582613.html