[求助]这是怎么回事啊?

dragonbbc

[user@localhost LumaQQ]$ Exception in thread "main" java.lang.UnsupportedClassVersionError: edu/tsinghua/lumaqq/LumaQQ (Unsupported major.minor version 49.0)
        at java.lang.ClassLoader.defineClass0(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$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClassInternal(Unknown Source)

系统是 Redhat Fedora core3简体中文舨, JAVA环境是 j2re1.4.2_08

xiaosir

java.lang.UnsupportedClassVersionError: edu/tsinghua/lumaqq/LumaQQ
请习惯看提示，jdk版本低