Java学习：Error: A JNI error has occurred, please check your installation and try again

在使用cmd运行.class文件时发生错误：

Error: A JNI error has occurred, please check your installation and try again
Exception in thread “main” java.lang.UnsupportedClassVersionError: Test01 has been compiled by a more recent version of the Java Runtime (class file version 59.0), this version of the Java Runtime only recognizes class file versions up to 52.0

错误：发生JNI错误，请检查安装并重试（JNI是Java Native Interface的缩写）
这是由于Java的版本和JDK版本不同。
解决办法：
Window->Preferences->Java->Compiler进入如下界面，然后接着选择JDK版本

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