[JAVA] About what I did when creating a .clj file in Clojure

problem

When I created clj-test.clj to create clj-test.core space in Clojure, lein got very angry.

Solution

Changing clj-test.clj to clj_test.clj and the namespace to clj-test.core works fine.

Cause

It seems to be a java specification that the hyphen in the package name is an error.

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