I'm trying to load images in Java for use in icons with the following:
new ImageIconr(url)
Mostly, this works fine. But just once in a while it fails with:
Uncaught error fetching image:
java.lang.SecurityException
at java.lang.SecurityManager.checkPermission(SecurityManager.java:562)
at java.lang.SecurityManager.checkConnect(SecurityManager.java:1078)
at sun.awt.image.URLImageSource.checkSecurity(URLImageSource.java:81)
at sun.awt.image.ImageRepresentation.imageComplete(ImageRepresentation.j
ava:597)
at sun.awt.image.InputStreamImageSource.errorConsumer(InputStreamImageSo
urce.java:131)
at sun.awt.image.InputStreamImageSource.setDecoder(InputStreamImageSourc
e.java:331)
at sun.awt.image.InputStreamImageSource.doFetch(InputStreamImageSource.j
ava:252)
at sun.awt.image.ImageFetcher.fetchloop(ImageFetcher.java:172)
at sun.awt.image.ImageFetcher.run(ImageFetcher.java:136)
What's worse, surrounding the code with a try-catch block doesn't save you - the application simply locks up. Note that this
only happens when running under a SecurityManager such as under WebStart. It seems there's a bug in the JDK
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4881229
which means that if the URL gets redirected with an http 302, then an internal thread in the JDK will fail. This
is pretty hopeless - can't fix it, can't trap it.
The workaround is to use a different part of the API. Instead of constructing an Icon from a URL, you first get an Image using
Image im = ImageIO.read(url);
then construct an icon from that:
new Icon(im);
