问题描述：
在执行简单的Java 语句的时候，出现了
Error: A JNI error has occurred, please check your installation and try again
Exception in thread “main” java.lang.UnsupportedClassVersionError: lessons/testValue 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
问题解决：
Package-> Build path-> Configure Build Path-> Java Compiler -> “Compiler compliance level”
从 ‘11’ 更新为‘1.8’
备注
我本地java 版本为 1.8.0.231