1.7_02 -> 1.5, Now throws java.io.UTFDataFormatException

[Daniel Croft]

Ok, so I'm writing this game. It was working fine using the 1.7_02 jdk, but then I downgraded it to 1.5 so that it would run on my brother's Mac. Now when I run it, it can't load png files. Here's the code that generates the exception:

Resources.setImgLoading(new ProgressBarImages(
                  ImageIO.read(c.getResource("images/loading/imgLoadingBack.png")),
                  ImageIO.read(c.getResource("images/loading/imgLoadingFore.png"))));

This code generates the following stacktrace + exception

java.io.UTFDataFormatException: malformed input around byte 31
	at java.io.DataInputStream.readUTF(Unknown Source)
	at javax.imageio.stream.ImageInputStreamImpl.readUTF(Unknown Source)
	at com.sun.imageio.plugins.png.PNGImageReader.parse_iTXt_chunk(Unknown Source)
	at com.sun.imageio.plugins.png.PNGImageReader.readMetadata(Unknown Source)
	at com.sun.imageio.plugins.png.PNGImageReader.readImage(Unknown Source)
	at com.sun.imageio.plugins.png.PNGImageReader.read(Unknown Source)
	at javax.imageio.ImageIO.read(Unknown Source)
	at javax.imageio.ImageIO.read(Unknown Source)
	at data.LoadThread.run(LoadThread.java:28)

I also tried this instead, but it gave me the same thing

ImageIO.read(new File("C:\\Libraries\\Programming\\Eclipse Workspace\\Evil Empire\\bin\\data\\images\\loading\\imgLoadingFore.png"));

If anyone has any ideas why 1.5 would throw this exception but 1.7 wouldn't that would be great.

[Paul Clapham]

I don't know this for certain, but one likely answer is that Sun/Oracle fixed the bug sometime after they released your Java 1.5 version.

[Daniel Croft]

Yeah, I really hope that's not it. My brother is helping me with the game and Apple has him over a barrel because they never bother to update their Java.

[Paul Clapham]

Apple and Java? Yeah, no kidding. Anyway Sun and Oracle have always published a big list of bug fixes along with their "What changed in this version" document. It would be tedious, but if you were really interested you could track down those documents and read all of the bug fixes to see if that's one of them.

[Daniel Croft]

Haha, yeah. I don't think I'm that committed. I originally installed 1.5.0, and there were 22 updates until 1.6. I guess I could just try to narrow down where it breaks by downloading a few more JREs, maybe then I'd stand a chance.

[Paul Clapham]

Java 6 for Apple was released nearly 3 years ago... but maybe your brother has an old Mac OS version which doesn't support it?

[Daniel Croft]

Yeah, he has umm... 10.5.8 I think. I looked it up and I found 1.6 for it, but it was only for the 64bit version :/

[Daniel Croft]

After some trial and error, I finally found that the problem was fixed by the update from 1.5.0_22 -> 1.6.0. I don't know if this might help anyone figure out how I might run my code on 1.5 but I'm still looking for a solution and any help would be appreciated.