使用java命令出現Error: A JNI error has occurred, please check your installation and try again的錯誤...

運行Java程序，javac運行.java文件沒有報錯，但java運行的時候報錯 ​​​ 仔細看一下報錯 Exception in thread "main" java.lang.UnsupportedClassVersionError: helloworld has been compiled by a more recent version of the Java Runtime (class

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