为何遇上 java.lang.NoClassDefFoundError: sun/awt/X11GraphicsEnvironment ？

[gz85521734]

编译没有问题，运行时候遇上 java.lang.NoClassDefFoundError: sun/awt/X11GraphicsEnvironment 错误，如何解决？我不想装X window

运行环境freebsd 4.6 + jdk1.3.1 + tomcat4.1.12

[Arbinsun]

打包后运行时没找到你的主类或classpath不对

[yergrad]

源程序贴出来

[alaclp]

别人给我讲了一个hello程序：
public class Hello{
public static void main(String[] args){
System.out.println("Hello World!");
}

}
1.保存成hello.java
2.编译
C:\j2sdk1.4.1_01\MyProg>javac -verbose hello.java
[parsing started hello.java]
[parsing completed 280ms]
[loading C:\J2SDK1.4.1_01\JRE\lib\rt.jar(java/lang/Object.class)]
[loading C:\J2SDK1.4.1_01\JRE\lib\rt.jar(java/lang/String.class)]
[checking Hello]
[loading C:\J2SDK1.4.1_01\JRE\lib\rt.jar(java/lang/System.class)]
[loading C:\J2SDK1.4.1_01\JRE\lib\rt.jar(java/io/PrintStream.class)]
[loading C:\J2SDK1.4.1_01\JRE\lib\rt.jar(java/io/FilterOutputStream.class)]
[loading C:\J2SDK1.4.1_01\JRE\lib\rt.jar(java/io/OutputStream.class)]
[wrote Hello.class]
[total 1760ms]

3.运行
C:\j2sdk1.4.1_01\MyProg>java hello
Exception in thread "main" java.lang.NoClassDefFoundError: hello (wrong name: He
llo)
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:502)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:12
3)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:250)
at java.net.URLClassLoader.access$100(URLClassLoader.java:54)
at java.net.URLClassLoader$1.run(URLClassLoader.java:193)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:186)
at java.lang.ClassLoader.loadClass(ClassLoader.java:299)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:265)
at java.lang.ClassLoader.loadClass(ClassLoader.java:255)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:315)

和楼主的错误类似不知道是什么原因？

[peanz]

是不是大小写的问题？Hello

[fastmask]

哈哈，环境不支持或者是你的classpath错误