eclipse Java compiler level does not match the version of the installed Java project facet.

CreateTime--2018年4月24日10:28:43

Author:Marydon

1.情景再现

2.选中项目-->右键-->Build Path-->Configure Build Path；

3.Java Build Path-->选中"JRE System Library"-->Edit；

4.选择"Alternate JRE"，也可以选择"Workspace default JRE"-->Finish-->Apply；（我设置的是工作空间默认项）

5.Java Compiler-->下面说的是currently 1.7-->所以将1.5改为1.7-->Apply；

6.Yes-->OK即可。

 

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