Intellij中出现:Diamond types are not supported at this language level

1.解决办法如下:
进入:File->project,修改如下两部分内容:
1.Modules块中Source部分的Language Level部分,修改为8-Lambda,type annotation etc.
2.Project中的project Language Level:8-Lambda,type annotation etc.

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转载自blog.csdn.net/liu16659/article/details/80230164