Java开发网 - 请大虾帮忙看看这种出错情况！！ (java.lang.NoClassDefFoundError)

Topic: 请大虾帮忙看看这种出错情况！！ (java.lang.NoClassDefFoundError)

1.请大虾帮忙看看这种出错情况！！ (java.lang.NoClassDefFoundError)

Posted by: li123
Posted on: 2004-04-14 16:51

D:\ClassTest\sqlorder>java sqlorder.sqlclass
Exception in thread "main" java.lang.NoClassDefFoundError: sqlorder/sqlclass (wr
ong name: sqlorder/SqlClass)
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:537)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:12
3)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:251)
at java.net.URLClassLoader.access$100(URLClassLoader.java:55)
at java.net.URLClassLoader$1.run(URLClassLoader.java:194)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:187)
at java.lang.ClassLoader.loadClass(ClassLoader.java:289)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:274)
at java.lang.ClassLoader.loadClass(ClassLoader.java:235)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302)

D:\ClassTest\sqlorder>java -classpath d:\classtest\jtds-0.8-rc1.jar sqlorder.sql
class
Exception in thread "main" java.lang.NoClassDefFoundError: sqlorder/sqlclass

我快被他折腾死了；
大虾救救小弟。。
谢谢！！！

2.Re:请大虾帮忙看看这种出错情况！！！ [Re: li123]	Copy to clipboard
Posted by: Jove Posted on: 2004-04-14 16:52 CLASSPATH=.

3.Re:请大虾帮忙看看这种出错情况！！！ [Re: li123]	Copy to clipboard
Posted by: li123 Posted on: 2004-04-14 18:33 我已经用-classpath了还是不行 D:\ClassTest\sqlorder>java -classpath d:\classtest\jtds-0.8-rc1.jar sqlorder.sql class Exception in thread "main" java.lang.NoClassDefFoundError: sqlorder/sqlclass

4.Re:请大虾帮忙看看这种出错情况！！！ [Re: li123]	Copy to clipboard
Posted by: bluebangbang Posted on: 2004-04-14 18:39 According your classpath,Can you find the floder sqlorder???

5.Re:请大虾帮忙看看这种出错情况！！！ [Re: li123]	Copy to clipboard
Posted by: jameszhang Posted on: 2004-04-14 21:51 li123 wrote: 我已经用-classpath了还是不行 D:\ClassTest\sqlorder>java -classpath d:\classtest\jtds-0.8-rc1.jar sqlorder.sql class Exception in thread "main" java.lang.NoClassDefFoundError: sqlorder/sqlclass classpath后面没有"" !!!

6.Re:请大虾帮忙看看这种出错情况！！！ [Re: li123]	Copy to clipboard
Posted by: dorrenchen Posted on: 2004-04-14 22:04 run your command in "D:\ClassTest", not "D:\ClassTest\sqlorder"

7.Re:请大虾帮忙看看这种出错情况！！！ [Re: li123]	Copy to clipboard
Posted by: zhanglixy Posted on: 2004-04-17 20:16 URL中有端口号吗?

8.Re:请大虾帮忙看看这种出错情况！！ (java.lang.NoClassDefFoundError) [Re: li123]	Copy to clipboard
Posted by: kjjx Posted on: 2004-04-29 17:10 在你的classpath变量前面加上 .;

9.Re:请大虾帮忙看看这种出错情况！！ (java.lang.NoClassDefFoundError) [Re: li123]	Copy to clipboard
Posted by: 风暴冲浪 Posted on: 2004-04-30 23:42 怎么没有高手进来支招啊。。。我也出现这种问题了。。。

10.Re:请大虾帮忙看看这种出错情况！！ (java.lang.NoClassDefFoundError) [Re: li123]	Copy to clipboard
Posted by: 风暴冲浪 Posted on: 2004-05-01 00:15 你看看大小写吧。。。我的问题解决了。。是大小的问题。。。

11.Re:请大虾帮忙看看这种出错情况！！ (java.lang.NoClassDefFoundError) [Re: li123]	Copy to clipboard
Posted by: bencafe Posted on: 2004-05-03 10:26 maybe classpath wrong

12.Re:请大虾帮忙看看这种出错情况！！ (java.lang.NoClassDefFoundError) [Re: li123]	Copy to clipboard
Posted by: bencafe Posted on: 2004-05-03 10:28 maybe classpath is wrong

13.Re:请大虾帮忙看看这种出错情况！！ (java.lang.NoClassDefFoundError) [Re: li123]

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Posted by: midlet
Posted on: 2004-05-03 10:30

this is a problem of package definition.

When Java is trying to load your program or program package, it will start searching directory in environment variable CLASSPATH. You can add".;" into the varaible to make java loader search your program in your CURRENT DIRECTORY.

And also, in your question, i think you should go to directory D:\ClassText rather than D:\ClassText\sqloader since your have explicitly state your package as sqloader.sqlclass.

By the way, I heard that JDK1.4.2 has done some adjustment for this. It means you will not encouter such a problem even without proper CLASSPATH setting.