求助~马上要验收了，打包还是出错
我的项目名称是Help，导出的jar包名称是help1。在eclipse中导出对应的jar包，在命令窗口用java -jar help1.jar时报错如下。我的jdk和jre版本是一致的，都是1.8.0_74。
E:workspace>java -jar help1.jar
Exception in thread "main" java.lang.UnsupportedClassVersionError: org/dijkstromania/Dijkstromania : Unsupported major.minor version 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.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)
求遇到过类似问题或者有解决方法的各位帮忙解答一下~
