Anyway, here are my two steps of minimal step-by-step help. I think this will get you the results you want, although there are probably better ways to achieve what step 1 gets you:
1) Delete /usr/bin/java 2) add this line to /etc/profile:
$JAVA_HOME = /usr/java/j2sdk1.4.2_04/bin/
But as a former novice myself, I think it will benefit you to understand why you are doing these steps. One day you're going to need to change what's in step two, and it may not be a simple change (for example, if you need to have two versions of java installed).
On 03/17/2004 01:23 AM, Kaustubh Ghosh wrote:
On Wednesday 17 March 2004 02:35 am, Mark Eggers <mdeggers@xxxxxxxxxxxxx> wrote:
Kaustubh Ghosh wrote:
I am quite novice towards java programming in linux.To start with I
installed j2re1.4.2_03 and also j2sdk1.4.2_04 in FC1(Both from
java.sin.com).Now peculiar problems arise.
When I type "java -version" it gives 1.3.1(
When I type "/usr/java/j2sdk1.4.2_04/bin/java -version" it gives
1.4.2_04. Anyway I can compile any .java file with javac.
But when I try to run it with java(any of the above) the gui would not
come.(Hello World executes perfectly with System.out.println as also
other non-gui programs).
You have both Sun's Java and GNU's Java installed. GNU's Java comes by default when you select all of the compilers during the install.
What I did was to find all the matching files in /usr that were supplied by Sun's J2SDK and moved them to a /usr/<directory>/orig. I then added my $JAVA_HOME/bin and $JAVA_HOME/jre/javaws to my PATH variable. javaws is where Java WebStart is located.
Like you, I have multiple Java versions installed. I usually keep the current release and the previous release around in case something breaks in the current release that didn't break in the previous release.
To do this I make a symbolic link from where I installed Java to /usr/java.
For example, if I have j2sdk1.4.2_02 and j2sdk1.4.2_04 installed in /usr, I will link /usr/j2sdk1.4.2_04 to /usr/java.
I then set JAVA_HOME to /usr/java.
This arrangement seems to work reasonably well. Another approach would be to not make the link to /usr/java and just set the JAVA_HOME environment variable appropriately.
However, in both cases you'll need to take the GNU commands out of your path and make sure that you have the Sun-supplied versions in your path.
HTH /mde/
Well,I think that is exactly my case.But being quite a novice I cannot do all you said(like setting JAVA_HOME).Can you just give me the commands to be used step by step.It would help me immensely.Thanks.
