NegativeArraySizeException

[2002 JI Open Discussion]

By: Gary Hill - gary_hill94

NegativeArraySizeException

2003-08-25 19:19

I am displaying an image on a report that is passed to the report as a report parameter. If I load a JPEG from a file and create an Image with the ToolKit everything works fine. If I pull the JPEG from a database BLOB then create an Image with the ToolKit I get a NegativeArraySizeException from DataBufferInt. Four lines into the stack trace it lists the JRImageLoader. I have a JOptionPane displaying the Image that is passed to the report. The JOptionPane has no problems with either Image. Any ideas?

 

I'm using JDK 1.3 and JasperReports 0.4.4.

 

 

 

 

 

By: Gary Hill - gary_hill94

RE: NegativeArraySizeException

2003-09-03 10:22

Perhaps my problem statement was not clear. Here it is again.

 

1. Create a java.lang.Image from a JPEG file on disk.

2. Display the Image on a JOptionPane.

3. Pass the Image to my report as a report parameter.

4. View the report.

 

The process described above works fine.

 

1. Create a java.lang.Image from a database BLOb. (The BLOb contains the same image as the JPEG file.)

2. Display the Image on a JOptionPane.

3. Pass the Image to my report as a report parameter.

4. View the report.

 

This process fails with a NegativeArraySizeException.

 

I believe the Image created from the database BLOb is okay because it displays on the JOptionPane properly, but JasperReports dies when I try to use it. To keep this posting short and readable I have not posted my source code or the text of the error trace. I can post it if needed.

 

Has anyone out there displayed an Image on a report that is extracted from a database BLOb?

 

Thank you for any assistance you can provide.

 

Gary

 

 

 

 

By: Gary Hill - gary_hill94

RE: NegativeArraySizeException

2003-09-22 12:36

Problem solved.

 

I had to use MediaTracker to be sure the image was fully loaded from the database before it was passed to my report. (Something I had already tried but must have done incorrectly.) I still cannot explain why the JOptionPane had no difficulty displaying the same image without using MediaTracker. Must have something to do with timing.

 

Gary