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What are the possible causes of File.getAbsolutePath() returning null?

 原文  2010-11-09 20:32:05  9   2    java/ file-io

Question

I'm running into a bug that appears to be caused by File.getAbsolutePath() returning null . What conditions could cause this? (The system seeing the exception is running Windows XP.)

The javadoc has a brief description of the path resolution procedure, but doesn't mention any situation that would result in a null path string being returned.

2 answers

solution1
 0  2010-11-09 20:36:15

我认为很明显 - 当文件未实例化或不存在时

solution2
 0  2010-11-09 22:29:44

Tracing through the API classes, the answer should be in Win32FileSystem.resolve(File) (look in your src.zip file)

You could always copy/paste the code from this method into your own project and then step through it with the File that's causing the problem.

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