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Message #11770
[Bug 1574879] Re: Java Desktop.browse not supported on Kubuntu 16.04
Thank you for taking your time to report this bug and making Ubuntu
better.
Please try to install gvfs-libs and see if that fix it, then report it
back here. Do not close the bug if it does as it indicates that the
openjdk-8-jre package is missing a dependency and we would need to fix
that.
What follows is a more technical overview of the underlying issue.
Desktop.browse(URI) calls sun.awt.DesktopBrowse.browse(URL) which is
implemented by sun.awt.X11.XDesktopPeer.desktop(URL). That in turn call
the native jni method gnome_url_show(byte[] url) that is dynamically
linked by jdk/src/solaris/native/sun/xawt/gnome_interface.c to the gvfs
function of the same name. Thus gvfs libraries must be installed on the
system for those calls to work. Still it is not clear if and how exactly
this will work out on a non-gnome system: a quick search didn't indicate
exactly how gnome_url_show is set up (gconf?).
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https://bugs.launchpad.net/bugs/1574879
Title:
Java Desktop.browse not supported on Kubuntu 16.04
Status in openjdk-8 package in Ubuntu:
New
Bug description:
The Desktop.browse functionality of Java is not supported on the
Kubuntu 16.04 level of the KDE desktop. It was supported in earlier
levels.
With this support no longer available, a Java application can no
longer activate the system's browser to display the already-installed
HTML help files for the application, making the context-sensitive help
functionality useless.
Here is the Java code snippet where the code attempts to activate the
online help:
if (Desktop.isDesktopSupported())
{
Desktop desktop = Desktop.getDesktop() ;
if (desktop.isSupported(Desktop.Action.BROWSE))
{
try
{
desktop.browse(new URI(url)) ;
}
catch (Exception e)
{
String error = "Problem creating URI to access documentation:\n" + e.getMessage() ;
reportError(error, true) ;
}
}
else
reportError("Desktop.browse not supported on this system.", true) ;
}
When this code is executed, the "Desktop.browse not supported on this
system." error message is displayed, rather than activating the user's
Internet browser to display the HTML help file already installed in
the user's file-system.
In prior releases of Kubuntu, this has always worked. I expected it
to work on 16.04 (as it does on the other 'flavors' of Ubuntu 16.04),
but it is not supported in the KDE desktop of Kubuntu 16.04
I am using Kubuntu 16.04.
In prior releases of Kubuntu, the online help information was
displayed using the system's Internet browser, which was what I
expected to happen.
In this release, I instead got the "Desktop.browse not supported on
this system." error message, and the Internet browser was not
activated to display the already-installed (via Debian package) help
information.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: openjdk-8-jre 8u77-b03-3ubuntu3
ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
Uname: Linux 4.4.0-21-generic x86_64
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
CurrentDesktop: KDE
Date: Mon Apr 25 16:12:50 2016
InstallationDate: Installed on 2016-04-22 (3 days ago)
InstallationMedia: Kubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
SourcePackage: openjdk-8
UpgradeStatus: No upgrade log present (probably fresh install)
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