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Possible Duplicate:
Eclipse exclamation mark
eclipse 在我的项目旁边显示一个感叹号，并且该项目的所有类都没有显示错误消息。我清理了项目并再次重新启动，感叹号仍然存在。
问题选项卡输出:
Description Resource Path Location Type
The container 'Android Dependencies' references non existing library 'D:\workspaceQR
\QRTest\bin\qrtest.jar' QR01 Build path Build Path Problem
SupplementalInfoRetriever cannot be resolved CaptureActivity.java /QRTest
/src/com/google/zxing/client/android line 496 Java Problem
ShareActivity cannot be resolved to a type CaptureActivity.java /QRTest/src/com
/google/zxing/client/android line 299 Java Problem
ResultHandlerFactory cannot be resolved CaptureActivity.java /QRTest/src/com
/google/zxing/client/android line 359 Java Problem
ResultHandler cannot be resolved to a variable CaptureActivity.java /QRTest
/src/com/google/zxing/client/android line 503 Java Problem
ResultHandler cannot be resolved to a type CaptureActivity.java /QRTest/src/com
/google/zxing/client/android line 359 Java Problem
ResultHandler cannot be resolved to a type CaptureActivity.java /QRTest/src/com
/google/zxing/client/android line 438 Java Problem
ResultHandler cannot be resolved to a type CaptureActivity.java /QRTest/src/com
/google/zxing/client/android line 521 Java Problem
ResultButtonListener cannot be resolved to a type CaptureActivity.java /QRTest
/src/com/google/zxing/client/android line 508 Java Problem
我没有任何名为 QRTest 的类，但我有 QR01，因此我将 QR01 重命名为 QRTest 但问题仍然存在。
有什么办法解决这个问题吗？