It is indirectly referenced from required .class file

这种问题是因为你在导入别人的文件的时候确实jar包或者是jdk致使 好比个人状况是 java.lang.enum cannot be resolved,It is indirectly referenced from required .class file 就是由于少了jdk,具体作法,右键项目-》buildpath-》configur build path-》library-》add library->jre system library->选一个jre或者jdk便可
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