錯誤消息：
Error: A JNI error has occurred, please check your installation and try again
Exception in thread “main” java.lang.UnsupportedClassVersionError: JavaVersionChecker has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader1. r u n ( U n k n o w n S o u r c e ) a t j a v a . s e c u r i t y . A c c e s s C o n t r o l l e r . d o P r i v i l e g e d ( N a t i v e M e t h o d ) a t j a v a . n e t . U R L C l a s s L o a d e r . f i n d C l a s s ( U n k n o w n S o u r c e ) a t j a v a . l a n g . C l a s s L o a d e r . l o a d C l a s s ( U n k n o w n S o u r c e ) a t s u n . m i s c . L a u n c h e r 1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher1.run(UnknownSource)atjava.security.AccessController.doPrivileged(NativeMethod)atjava.net.URLClassLoader.findClass(UnknownSource)atjava.lang.ClassLoader.loadClass(UnknownSource)atsun.misc.LauncherAppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)
執行javac -version和java -version，發現傳回的版本結果不一樣：
