GEdit opens java files with C source highlighting

Did you set it to no highlighting? if you go to view>highlight mode> none it should than not highlight any file that you open.

I'm not sure what you mean. Previously when a java file was opened it was highlighted for java. Now, when I open a java file it is stuck with C highlighting which means that words like public and class are not highlighted, but types that are part of c like int are.

If you right click on a .java from nautilus, open the properties, what mimetype is listed? if you go to the gedit preferences, what highlighting type is selected?

text/x-csrc

Apologies for not checking that first :-(

This was a wrong settings issue not a bug. Thank you for reporting this bug and feel free to report any more that you find.

John, don't close bugs too fast. Having a .java detected as text/x-csrc is a bug. Could you attach an example of such file to the bug?

shared-mime-info defines files starting by "/*" as a C source file. If you add an blank char before it it's detected as a java file. Is "/*" a regular java comment?

/* ... */ is what I was taught to use a Java comment by Professors. Furthermore, when I open the file on my Dapper box in nautilus, the mime-type is
text/x-java

I stumbled upon this issue after upgrading from Ubuntu 6.06 to 6.10.

The following "patch" worked for me:

1. Open the file Override.xml (create it when missing)

On console:
gedit ~/.local/share/mime/packages/Override.xml

2. Make the file look the following (but don't remove other possible entries you might have):

<?xml version="1.0" encoding="UTF-8"?>
<mime-info xmlns="http://www.freedesktop.org/standards/shared-mime-info">
  <mime-type type="application/x-javascript">
    <sub-class-of type="text/plain"/>
    <comment>Javascript program</comment>
    <glob pattern="*.js"/>
    <magic priority="30">
      <match value="/*" type="string" offset="0"/>
      <match value="//" type="string" offset="0"/>
    </magic>
  </mime-type>
</mime-info>

3. Rebuild the mime-type database. The changes should be instant-applied, but if not try logging out and logging back in.

On console:
update-mime-database ~/.local/share/mime

Should be fixed in feisty with shared-mime-info 0.19-1ubuntu3 now.

Someone mentioned that this might have reappeared for Ubuntu hardy heron 8.04
http://ubuntuforums.org/showthread.php?p=5480156

This is a confirmation about the problem.

It happened for me as well. The problem is identical to that mentioned in the post on Ubuntu Forums.

To reiterate, javascript files ending in '.js' are detected as C source code files. The mime type in nautilus is 'application/javascript' and in gedit it is 'C source code (text/x-csrc)'.

The beginning of the file starts with a comment of the form '/* ... */' and a line of the form 'function f(var) {'. Removing the comments causes the mime type to change to 'MATLAB script/function (text/x-matlab)'.

Sorry, I forgot to mention that I'm using Ubuntu 8.04