diamond types are not supported -sourceX.X
file ->Project Structure ->project setting ->project ->project language level 改成一下選項(xiàng)
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但是還是不行仑濒,后來發(fā)現(xiàn)還是需要改一下這里
在prject setting ->Modules中也將Language level調(diào)整至以上選項(xiàng)愿卒,做到匹配:
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問題解決