每天来自每个班级的 java.lang.NoClassDefFoundError [英] java.lang.NoClassDefFoundError from every class every day

问题描述

我试过重新安装 netbeans，我试过重新安装 java.我不确定发生了什么，但我从每个班级随机得到这个异常，直到我重新启动 netbeans.有没有遇到类似问题的人?

I have tried reinstalling netbeans, I have tried reinstalling java. I'm not sure what's going on but I get this exception at random from every class until I restart netbeans. Anyone with similar problems?

运行:

Exception in thread "main" java.lang.NoClassDefFoundError: com/company/utilities/formatters/DateFinder
    at com.protocase.db.DatabaseAdapter.<init>(DatabaseAdapter.java:44)
    at packagingqueries.PackagingQueries.getBatchIDsForOperation(PackagingQueries.java:42)
    at packagingqueries.PackagingQueries.main(PackagingQueries.java:20)
Caused by: java.lang.ClassNotFoundException: com.protocase.utilities.formatters.DateFinder
    at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
    at java.security.AccessController.doPrivileged(Native Method)

推荐答案

有时，NetBeans 本地缓存目录会损坏(因为应用程序较早崩溃或因为其他/未定义的事情发生).NetBeans 开始出现奇怪的行为.重新安装没有帮助，因为本地缓存目录并不总是被删除.

Sometimes, the NetBeans local cache directory becomes corrupted (either because the application crashed earlier or because something else/undefined happened). NetBeans starts to behave strangely. Re-installing does not help, because the local cache directory is not always deleted.

如果您 100% 确定您的应用程序没有路径问题:

If you are 100% sure your application does not have a path problem:

1. 关闭 NetBeans
2. 如果您使用的是 Windows，请转到 c:Usersyouruserid.netbeans7.0(或者在您的系统上找到相应的目录)
3. 彻底删除内容
4. 重启 NetBeans

NetBeans 将重新创建此目录的内容.这可能解决您的问题.如果没有，那么您的问题肯定出在应用程序的配置或损坏的库中.

NetBeans will recreate the content of this directory. This may solve your issue. If it does not, then your issue is in the configuration of your application or in a corrupted library for sure.

如果存储这些文件的位置没有足够的写入空间，就会出现这个问题.像往常一样，一个人需要腾出空间......

If the location where these files are stored runs out of space for writing, this problem can arise. As usual, one needs to make space...

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