On Thu, 12 Sep 2002, jOhN JoHn wrote:
> --- Debopam Ghoshal <[EMAIL PROTECTED]> wrote:
> > Hi All,
> > Can anyone please help me on how to run the JDK
> > (1.4.0) on linux. I have downloaded and installed the
> > jdk (a .bin file) by writing sh <filename> and the
> > prompt. However i do not know how to proceed next.
> > That is, how to bring the JDK files in the path and
> > also the lib files in the classpath. It would be of
> > immense help of someone pls gives me a detailed
> > description of how to compile and execute simple
> > "hello world" file in linux. I am using Red Hat Linux
> > 7.1.
> >
> Hello,
>
> Im no linux guru and its been awhile since I installed the JDK but it went
> something like this:
> I had to change the .bin file to an executable with
> chmod +x filename
> then execute the file with
> ./filename
> this extracted an .rpm which is intalled with
> rpm -i filename.rpm
>
> I forget where the files were installed but if I needed to find them I
> would look for them with
> find -name java.exe -print
> then add that path to my PATH variable in ~/.bash_profile
> this would put 'javac' for compiling and 'java' for running on your path.
>
> This may or may not be good advice but hopefully it helps.
>
> ~John
>
It sounds like the original poster downloaded the 'tar.gz' version, not
the rpm version.
In that case, the sequence of events that lead up to a working
installation of the jdk are these:
chmod +x j2sdk-1_4_0_01-linux-i586.bin
sh j2sdk-1_4_0_01-linux-i586.bin
su
mv j2sdk1.4.0_01 /usr/local/
cd /usr/local/
ln -s j2sdk1.4.0_01 java
echo "#!/bin/sh
> export JDK_HOME=/usr/local/java
> export JAVA_HOME=/usr/local/java
> PATH=$PATH:$JDK_HOME/bin" > /etc/profile.d/java.sh
exit
Then next time you login, you'll be able to run 'java' and 'javac' from
the commandline anywhere on the system.
You can also add classpath stuff to /etc/profile.d/java.sh
But you normally don't need to do that unless you are using special
packages. (The Sun Java ones will be found automatically)
Here's a simple helloword program:
$ set |grep PATH
PATH=/bin:/usr/bin:/usr/local/java/bin
$ set |grep CLASSPATH
$ l
total 12
drwxrwxr-x 2 meetsma meetsma 4096 Sep 12 16:53 .
drwx-----x 39 meetsma meetsma 4096 Sep 12 16:48 ..
-rw-rw-r-- 1 meetsma meetsma 108 Sep 12 16:53 Hello.java
$ cat Hello.java
public class Hello{
public static void main(String argv[]){
System.out.println("Hello World");
}
}
$ javac Hello.java
$ l
total 16
drwxrwxr-x 2 meetsma meetsma 4096 Sep 12 16:57 .
drwx-----x 39 meetsma meetsma 4096 Sep 12 16:48 ..
-rw-rw-r-- 1 meetsma meetsma 415 Sep 12 16:57 Hello.class
-rw-rw-r-- 1 meetsma meetsma 108 Sep 12 16:53 Hello.java
$ java Hello
Hello World
$
Hope this helps,
--
Arend
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