java 运行报错has been compiled by a more recent version of the Java Runtime (class file version 54.0)

java 运行报错has been compiled by a more recent version of the Java Runtime (class file version 54.0)

在项目的属性里设置jdk版本，方法是右击项目–>properties–>java compiler --> Enable project specific settings -->将compiler compliance level设置为1.8，也就是与jvm一致的版本