Printable View
i have a dual boot system with XP and knoppix.
i am not very well versed when it comes to linux, but i can't really concentrate on learning linux because i am stuck using windows for all the programming stuff i do.
i tried to download the compiler and interpreter from java.sun.com but i really don't know how to make it install or run. as i said im not well versed in linux. can i apt-get them someway?
any help would be appreciated
Sun does not use an open license for Java so it is not included with the official Debian archives, so you can't apt-get install with a stock /etc/sources.list file.
However, the Blackdown project (blackdown.org) provides Java packages for Debian (and many others). These are not very up to date (usually) so I just download the Java SDK (not the JRE!) from Sun and install it.
Here's how you do it:
1. Download the "Linux self-extracting file" package from http://java.sun.com/j2se/1.4.2/download.html
2. Create a directory for Java related stuff under /usr/local:
$ cd /usr/local
$ su (enter password for root, note that the prompt changes when you're root)
# mkdir java
# cd java
3. Then you need to run the file. With this file you can do it like this:
# sh j2sdk-1_4_2_01-linux-i586.bin
....or like this:
# chmod +x j2sdk-1_4_2_01-linux-i586.bin (this makes the file executable)
# /home/hw/downloads/j2sdk-1_4_2_01-linux-i586.bin (execute it - run this from the /usr/local/java directory)
4. Now it's installed. Still, the java and javac commands won't work from the command line because the /bin subdirectory from the SDK isn't in the path. We need to add them somehow. There are many different ways of doing this but this is how I usually do it:
Edit /etc/profile (as root) with your favourite text editor. There should be a line that specifies directories that contain executables and should be added to the PATH environment variable. Something like this:
PATH="/usr/local/bin:/usr/bin:/bin:/usr/bin/X11:/usr/games"
The directories are separated by colons(:). Add a colon at the end of the line (but before the closing quote) and add the Java bin directory. If you followed my outline above it should be /usr/local/java/j2sdk1.4.2/bin/.
Now the line looks like this:
PATH="/usr/local/bin:/usr/bin:/bin:/usr/bin/X11:/usr/games:/usr/local/java/j2sdk/bin"
Save the file! :)
Either log out and log in again or do a "source /etc/profile" to let the changes take effect. Type "javac" at the shell prompt and you should see the exact same thing as you see on Windows!
hw
thanks a shitload!! i will try this tonight for sure. thank you for your help, ill post if i have any troubles (i probably wont)
Thanks a shit-load indeed. That is an excellent how-to post. You are a scholar and a gentleman.
Yup, getting everything from java.sun.com is a good idea. That way you have the full java suite including javac, java, javadoc and appletviewer.
However, I use the following method without installing anything to an hdinstall (also works off a liveCD boot).
http://www.knoppix.net/forum/viewtopic.php?p=38190
http://www.knoppix.net/forum/viewtopic.php?p=38440
Enjoy!
Regards,
AJG
OK, I just tried to install the *.rpm with alien and kpackage as root. I used the *.rpm for J2SE 1.5 instead of the method listed above because I need to change the version of java system wide so all my users would get the update. The JDK that comes with KNOPPIX doesn't include javax.swing.*, javadoc or appletviewer. So I want all my users to get all this stuff! The problem is that the new java installation isn't available to my users. Did I forget to do something???
TIA,
AJG