Java项目导入eclipse后项目出现JRE System Library [JavaSE-1.8](unbound)

红色感叹号有几种错误,如果是jar包导入错误的话,可以参考链接:

https://blog.csdn.net/yql_617540298/article/details/107114861

右键项目,选择Build Path > Configure Build Path,如下图所示:

 选中JRE System Library[JavaSE-1.8](unbound),然后选择Edit

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转载自blog.csdn.net/yql_617540298/article/details/107163540