[问题]Java配置求助!

[javran]

按网络上的各种方法都不行..配置了java以后
以下源代码:

代码： 全选

class test
	{
		public static void main(String args[])
			{
				System.out.println ("Helloworld");
			}
	}

保存为test.java
javac编译成功,java test ,显示:

代码： 全选

Exception in thread "main" java.lang.UnsupportedClassVersionError: Bad version number in .class file
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)

之前的配置:
sudo update-alternatives --config java
3 /usr/lib/jvm/java-1.5.0-sun/jre/bin/java
/etc/jvm:

代码： 全选

# This file defines the default system JVM search order. Each
# JVM should list their JAVA_HOME compatible directory in this file.
# The default system JVM is the first one available from top to
# bottom.
/usr/lib/jvm/java-6-sun 

/usr/lib/jvm/java-1.5.0-sun

/usr/lib/jvm/java-gcj
/usr/lib/jvm/ia32-java-1.5.0-sun

/usr

/etc/enviroment:

代码： 全选

PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/jdk1.6.0_03/bin"
LANG="zh_CN.UTF-8"
LANGUAGE="zh_CN:zh:en_US:en"
CLASSPATH=/usr/lib/jvm/java-1.5.0-sun/lib
JAVA_HOME=/usr/lib/jvm/java-1.5.0-sun
MOZ_DISABLE_PANGO="1"

CLASSPATH前面无论有没有".:/"都没有用
请高手指教

[xg123]

我的也是这样啊！怎么没人解决啊！

[aitilang]

classpath 要有 . 不是./
classpath 要指定到jar文件，不能是目录

[aitilang]

env | grep -i path