compile java
 

i am using ubuntu linux. i installed jdk.
but i cann't compile java programmes. because linux can'tbe identify the javac command.

how can i solve that problem?

-jeyram-:tisk:

It sounds like you need to add java's bin directory to your path. Can you post the exact error message?

1st, instructions from java.sun.com
 

Have you tried using the free jsdk from Debian? It might be easier than figuring out all the classpath stuff.

If not, here is what Sun says about it:

http://java.sun.com/j2se/1.4.2/docs/...classpath.html

:twocents:

Yes, it's better to use the package provided in the Ubuntu repositories. The alternative is to edit /etc/profile or bash_profile, set up update-alternatives, etc. - a lot of work that you can easily spare yourself.

just find the path to your javac and java executables and add them to your path like this: export PATH=$PATH:/(path to javac):/(path to java)

You could also create a startup script that did this for you or modify the bash_profile or bashrc like mentioned above+

yap it's working. I understood what's happen. Javac is response for compilation. So if you want to do manually then you have to mention that path (like shell script).

Ex: ./jdkinstallationdirectory/bin/javac filename

If you export this path then Linux can find javac command automatically.

But I want to know some thing.
In Windows after the jdk installation If the os want to recognize javac then we have to set JAVA_HOME variable for compile java files (now I started to shift Linux environment).

I read from a PDF book that they mention about setenv command to create variable JAVA_HOME in Linux (for compilation purpose like export path). But I can’t find setenv command in my linux (Ubuntu).
Is that method true?


* I want to know this thing just for my knowledge.

That method is true but only applies to csh and its clones. The equivalent with sh/bash/ksh/zsh is the export builtin.

Usually, you set both JAVA_HOME and add it to your $PATH variable. You can do both by adding 'export' commands (like in Hondo's post) to your .bashrc or the system-wide /etc/bashrc files.

Typically, the commands look something like this:
You can also add an export for the Java libs, but that's optional.