How to make KDE aware of JAVA

Jordan&&&& · 09-19-2006, 01:17 PM

I have JAVA installed. I managed to add JAVA to the PATH in the bash.rc file.

Now I start all JAVA applications from the console including these that have GUI (for example eclipse). How can I start them directly from KDE.

Thanks in advance.

b0uncer · 09-19-2006, 01:29 PM

You edit the KDE's mime types information so that when you double-click a java file (which has a certain suffix) KDE checks out the mimetype information, sees that you've defined such files to be java files and to be opened using program X (java interpreter?) and does the job.

That's what I think, at least. Check out the Control Center.

Jordan&&&& · 09-19-2006, 02:02 PM

Incidently, eclipse executable has no extension. When I start it in KDE, it says:

A Java Runtime Environment (JRE) or Java Development Kit (JDK)
must be available in order to run Eclipse. No Java virtual machine
was found after searching the following locations:
/programs/eclipse/jre/bin/java
'java' in your current PATH

I've already tried to configure file extensions.

Configure your desktop -> File Associations ->

I have the following extensions appearing in the list related to JAVA. What does x stand for?

java
x-class-file
x-jar
x-java
x-java-applet
x-java-byte-code

I have set all of them (using edit button, then the application tab, and finally the command textbox) to /usr/java/j2sdk1.4.2_12/bin/java

robbbert · 09-19-2006, 02:51 PM

Which distribution, BTW?

There might be a need to install Sun Java, to explicitely set the Java CLASSPATH, and to explicitely start Eclipse by using a specific Java virtual machine.
I.e., my custom launcher is (don't get mad...),

Quote:

usr/lib/j2sdk1.5-sun/bin/java -Xms40m -Xmx256m -jar /media/hde1/home/robert/eclipse-3.2/startup.jar -os linux -ws gtk -arch x86 -launcher /media/hde1/home/robert/eclipse-3.2/eclipse -name Eclipse -showsplash 600 -exitdata 460011 -vm /usr/lib/j2sdk1.5-sun/bin -vmargs -Xms40m -Xmx256m -jar /media/hde1/home/robert/eclipse-3.2/startup.jar

- BTW, what's the output of

Quote:

which java

Jordan&&&& · 09-20-2006, 11:58 AM

which java: /usr/java/j2sdk1.4.2_12/bin/java
distribution: Mandriva

I guess that this custom launcher is the eclipse.ini file?

I have just realized that eclipse have a native loader that starts the startup.jar.

I add vm line in eclipse.ini but it is still the same.

-vm /usr/java/j2sdk1.4.2_12/bin/java
-vmargs
-Xms40m
-Xmx256m

While this might help me with eclipse what about java applications that do not have a native loader.

robbbert · 09-20-2006, 02:02 PM

Sorry for the misleading info on "which" BTW. Eclipse won't consider that.
Also, in my command line, the "-vm" argument is wrong. Yours in contrast, pointing to the "java" executable, is right.

Apparently, the java executable is not in the path. You can check that by:

Quote:

echo $PATH

Here's my $HOME/.bashrc file:

Quote:

export PATH=/usr/lib/j2sdk1.5-sun/bin:$PATH
export JAVA_HOME=/usr/lib/j2sdk1.5-sun
export CLASSPATH=/usr/lib/j2sdk1.5-sun/lib:/usr/lib/j2sdk1.5-sun/external-jars:/usr/lib/j2sdk1.5-sun/jre/lib/ext
export JBOSS_HOME=/media/hde1/home/robert/opt/jboss-4.0.4.GA

It gets executed when I login.