Looking to run java commands outside bin/

nro · 08-25-2004, 01:58 AM

I have a quick question that might just have a very simple solution.
I recently installed the Java 2 SDK in /usr/java/j2sdk1.4.2_05 and I'm running Mandrake 9.
All my compiling works as expected but I'm looking for an easier way to compile without having to run the command "cd /usr/java/j2sdk1.4.2_05/bin" everytime I open up a new Konsole.
Basically, I'm looking to run java commands such as "javac" and "java" from any location. For example:

mike@localhost mike]$ java
bash: java: command not found

Above is the result I get(my directory is /home/mike/).

If you have a solution to this problem or know somewhere to look, I would appreciate your help.

Thanks,
Mike

Tinkster · 08-25-2004, 02:04 AM

Code:

#!/bin/sh
export JAVA_HOME=/usr/lib/java
export MANPATH="$MANPATH:/usr/lib/java/man"
export PATH="$PATH:/usr/lib/java/bin:/usr/lib/java/jre/bin"

Replace the relevant bits with your actual path
to the sdk.

Throw that into your /etc/profile.d/ as j2sdk.sh
and chmod u+x it ...

Cheers,
Tink

hw-tph · 08-25-2004, 02:09 AM

You should add the directory containing the java and javac exeutables to your $PATH environment variable. $PATH usually contains dirs such as /bin, /usr/bin, /usr/local/bin, /usr/X11R6/bin and so on - directories which the shell searches for executables.

Try typing PATH=$PATH:/usr/java/j2sdk1.4.2_05/bin and then type java -version from the shell prompt. Now you have added the directory to your $PATH, but only in the current shell (the open terminal - when you start another one it won't be there).

Open up your ~/.bashrc and add the line we typed above:

Code:

PATH=$PATH:/usr/java/j2sdk1.4.2_05/bin

In order to make sure ~/.bashrc is parsed everytime we start a new shell, be it a login shell or not, we need to add this to ~/.bash_profile:

Code:

if [ -f ~/.bashrc ]
then
    source ~/.bashrc
fi

The above snippet checks if ~/.bashrc exists and is a file. If it does exist it will be parsed. Now you should have access to java and javac no matter in what directory you are currently located.

You may also want to set the $JAVA_HOME and $CLASSPATH variables in a similar way. For more info on that check out the documentation on java.sun.com.

Håkan

Edit: I see Tink beat me to it. Oh well. Two different ways of doing the same thing don't hurt.

Electro · 08-25-2004, 02:09 AM

Add the path to java in your PATH environment variable. To do this type
PATH=$PATH:/usr/java/j2sdk1.4.2_05/bin

You can add the above to ~/.bashrc or ~/.bash_profile. If you want to make it global for all users. You can add in /etc/profile or /etc/bashrc.

Darn, someone beat me to it. Oh well. My way will also work.

nro · 08-25-2004, 02:19 AM

Sorry, but you will have to bear with me here a little bit, I'm in my new stages of linux.
I don't follow along when you say "~/.bashrc or ~/.bash_profile" or "Replace your relevant bits with your actual path to the sdk". Where do I find these files/directories?
Unfortunately, I'm not to savvy yet on this stuff, so more basic instructions would be more than appreciated.

Thanks again,
Mike

Edit: I have tried Tink's method, didn't work for some reason...still get the same result.

Tinkster · 08-25-2004, 02:23 AM

Code:

#!/bin/sh
export JAVA_HOME=/usr/java/j2sdk1.4.2_05
export MANPATH="$MANPATH:$JAVA_HOME/man"
export PATH="$PATH:$JAVA_HOME/bin:$JAVA_HOME/jre/bin"

Try that one ...

Cheers,
Tink

nro · 08-25-2004, 02:30 AM

Tink,
Still getting the same reply as before with the new file.

However, I am able to run the command after typing in the PATH command, but as expected, once I close the Konsole down and open it again, I am not able to.

nro · 08-25-2004, 02:40 AM

Ahh, thank you for your help everyone. I figured out that '~' stood for, in my case, /home/mike/. Everything is in working condition exactly as I had hoped.

Thanks again,
Mike