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Problem with Objectuinputstream

 
Greenhorn
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Hi,

FileInputStream fis = new FileInputStream("c:\\nonav.log");
ObjectInputStream ois = new ObjectInputStream(fis);
String today = (String) ois.readObject();
byte[] bytedata= today.getBytes();

Above code i am getting below exception:

java.io.StreamCorruptedException: invalid stream header
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:768)
at java.io.ObjectInputStream.<init>(ObjectInputStream.java:283)
at com.ibm.test.ReadZipPObjectinputstream.main(ReadZipPObjectinputstream.java:56)


Please help me in resolving the issue.

Thanks,
Viswanath
 
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Did you write nonav.log with an ObjectOutputStream? If not, you cannot read it with an ObjectInputStream.
 
Ranch Hand
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Also check whether your ObjectOutputStream was flushed and closed properly.
 
Ranch Hand
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Originally posted by Prakash Subramanian:
Also check whether your ObjectOutputStream was flushed and closed properly.



Prakash, can not flushing and closing of ObjectOutputStream cause this exception? I have doubts.
 
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I don't think it caused this exception, but it can sure cause exceptions.

I once closed the backing OutputStream instead of the ZipOutputStream, and as a result the file was a corrupt ZIP file.
 
viswanath sigamala
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Thanks Guys for Help.
 
Wanderer
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I think it could possibly cause this exception - for example, if the full header never got written in the first place, because some of it was still in a buffer somewhere when the program terminated.
 
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