lumaqq的问题，不能运行,Bug?

schoolwind

一阵狂读硬盘之后，出现如下错误,FC4 ,jre 1.5：
[root@FC4 LumaQQ]# ./lumaqq
[root@FC4 LumaQQ]# Exception in thread "main" java.lang.NoClassDefFoundError: while resolving class: edu.tsinghua.lumaqq.LumaQQ
   at java.lang.VMClassLoader.transformException(java.lang.Class, java.lang.Throwable) (/usr/lib/libgcj.so.6.0.0)
   at java.lang.VMClassLoader.resolveClass(java.lang.Class) (/usr/lib/libgcj.so.6.0.0)
   at java.lang.Class.initializeClass() (/usr/lib/libgcj.so.6.0.0)
   at java.lang.Class.forName(java.lang.String, boolean, java.lang.ClassLoader) (/usr/lib/libgcj.so.6.0.0)
   at gnu.java.lang.MainThread.run() (/usr/lib/libgcj.so.6.0.0)
Caused by: java.lang.ClassNotFoundException: java.lang.StringBuilder not found in gnu.gcj.runtime.SystemClassLoader{urls=[file:/root/LumaQQ/lib/xerces.jar,file:/root/LumaQQ/lib/swt.jar,file:/root/LumaQQ/lib/poifs.jar,file:/root/LumaQQ/lib/org.eclipse.ui.workbench_3.1.0.jar,file:/root/LumaQQ/lib/org.eclipse.osgi_3.1.0.jar,file:/root/LumaQQ/lib/org.eclipse.jface_3.1.0.jar,file:/root/LumaQQ/lib/org.eclipse.emf.ecore.xmi_2.1.0.jar,file:/root/LumaQQ/lib/org.eclipse.emf.ecore_2.1.0.jar,file:/root/LumaQQ/lib/org.eclipse.emf.common_2.1.0.jar,file:/root/LumaQQ/lib/org.eclipse.core.runtime_3.1.0.jar,file:/root/LumaQQ/lib/org.eclipse.core.resources_3.1.0.jar,file:/root/LumaQQ/lib/lumaqq_xsd.jar,file:/root/LumaQQ/lib/lumaqq.jar,file:/root/LumaQQ/lib/log4j-1.2.8.jar,file:/root/LumaQQ/lib/jql_protocol.jar,file:/root/LumaQQ/lib/jql_net.jar,file:/root/LumaQQ/lib/jdom.jar,file:/root/LumaQQ/lib/commons-logging.jar,file:/root/LumaQQ/lib/commons-codec.jar,file:./], parent=gnu.gcj.runtime.ExtensionClassLoader{urls=[], parent=null}}
   at java.net.URLClassLoader.findClass(java.lang.String) (/usr/lib/libgcj.so.6.0.0)
   at java.lang.ClassLoader.loadClass(java.lang.String, boolean) (/usr/lib/libgcj.so.6.0.0)
   at java.lang.ClassLoader.loadClass(java.lang.String) (/usr/lib/libgcj.so.6.0.0)
   at java.lang.Class.forName(java.lang.String, boolean, java.lang.ClassLoader) (/usr/lib/libgcj.so.6.0.0)
   ...4 more

luma

不要使用gcj

schoolwind

具体怎么操作，不懂啊！FC4...