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並前往https://www.reddit.com/r/learnjava/comments/fjhgsm/why_does_systemgetenvclasspath_return_null/

Why does System.getenv("CLASSPATH") return null? - Reddit

... class Main { public static void main(String[] args) { String env = System.getenv("CLASSPATH"); System.out.println(env); } }. And this is my output: null.

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