急！Eclipse调试错误

[jay_jian]

用Eclipse单步调试在Debug窗口出现这样的错误信息，

sun.misc.URLClassPath$JarLoader.getJarFile(java.net.URL) line: 573
Thread [main] (Suspended (exception java.io.FileNotFoundException))
sun.misc.URLClassPath$JarLoader.getJarFile(java.net.URL) line: 573
sun.misc.URLClassPath$JarLoader.<init>(java.net.URL, java.net.URLStreamHandler, java.util.HashMap) line: 542
sun.misc.URLClassPath$3.run() line: 320
java.security.AccessController.doPrivileged(java.security.PrivilegedExceptionAction) line: not available [native method]
sun.misc.URLClassPath.getLoader(java.net.URL) line: 309
sun.misc.URLClassPath.getLoader(int) line: 286
sun.misc.URLClassPath.getResource(java.lang.String, boolean) line: 156
java.net.URLClassLoader$1.run() line: 191
java.security.AccessController.doPrivileged(java.security.PrivilegedExceptionAction, java.security.AccessControlContext) line: not available [native method]
sun.misc.Launcher$AppClassLoader(java.net.URLClassLoader).findClass(java.lang.String) line: 187
sun.misc.Launcher$AppClassLoader(java.lang.ClassLoader).loadClass(java.lang.String, boolean) line: 289
sun.misc.Launcher$AppClassLoader.loadClass(java.lang.String, boolean) line: 274
sun.misc.Launcher$AppClassLoader(java.lang.ClassLoader).loadClass(java.lang.String) line: 235
sun.misc.Launcher$AppClassLoader(java.lang.ClassLoader).loadClassInternal(java.lang.String) line: 302
java.lang.ClassLoader.defineClass0(java.lang.String, byte[], int, int, java.security.ProtectionDomain) line: not available [native method]
sun.misc.Launcher$AppClassLoader(java.lang.ClassLoader).defineClass(java.lang.String, byte[], int, int, java.security.ProtectionDomain) line: 537
sun.misc.Launcher$AppClassLoader(java.security.SecureClassLoader).defineClass(java.lang.String, byte[], int, int, java.security.CodeSource) line: 123
sun.misc.Launcher$AppClassLoader(java.net.URLClassLoader).defineClass(java.lang.String, sun.misc.Resource) line: 251
java.net.URLClassLoader.access$100(java.net.URLClassLoader, java.lang.String, sun.misc.Resource) line: 55
java.net.URLClassLoader$1.run() line: 194
java.security.AccessController.doPrivileged(java.security.PrivilegedExceptionAction, java.security.AccessControlContext) line: not available [native method]
sun.misc.Launcher$AppClassLoader(java.net.URLClassLoader).findClass(java.lang.String) line: 187
sun.misc.Launcher$AppClassLoader(java.lang.ClassLoader).loadClass(java.lang.String, boolean) line: 289
sun.misc.Launcher$AppClassLoader.loadClass(java.lang.String, boolean) line: 274
sun.misc.Launcher$AppClassLoader(java.lang.ClassLoader).loadClass(java.lang.String) line: 235
sun.misc.Launcher$AppClassLoader(java.lang.ClassLoader).loadClassInternal(java.lang.String) line: 302

－－－－－－－
另一个窗口出现
Source not found
The source attachment does not contain the source for the file URLClassPath.class
You can change the source attachment by clicking Change Attached Source below;
.....

是什么地方出错吗，编译都通过呀

[jay_jian]

晕死

[jay_jian]

没有人知道吗？晕呐

[BudsHome]

Source not found
源文件找不到
The source attachment does not contain the source for the file URLClassPath.class
源配置文件中没有包含源类文件URLClassPath.class
You can change the source attachment by clicking Change Attached Source below;
你可以点击下边的“Change Attached Source ”按钮来改变源配置文件

[jay_jian]

可是我并不知道这个类文件是出自哪里的，
如果类文件找不到，编译也不会过呀?

[qld001]

倒，这种问题九成九是环境变量的事，把源文件所在路径放到环境变量里，作为lib的路径，试试看吧

[jay_jian]

怎么知道少了哪些东东啊？帮帮我呀．

[jay_jian]

呜呜．．