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Old 03-12-2010, 10:49 AM   #1
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Registered: Mar 2010
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Lightbulb How to use jdk for java programming

Hi all
I would like to run java program on fedora10,but I am facing some problems .when I use which java command it show usr/bin/java directory.I was trying to set the java_home path in bash_profile,but there is no affect.Tell me how can I solve my problem?
Thanks in Advance

Last edited by bajaj15; 03-12-2010 at 10:53 AM.
Old 03-12-2010, 11:00 AM   #2
Registered: Jan 2008
Location: Brighton, UK
Distribution: Ubuntu 12.04 / CentOS 6.5
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Are you sure /usr/bin/java is a directory and not an executable?

You'd be better off downloading the official Sun JDK for Linux from their website - it's faster than the open JDK.

Anyway...either is fine.

You can add the JAVA_HOME environment variable to /etc/profile (system-wide) - but I doubt you'll need it if you're using the JDK supplied with Fedora 10. Why do you feel you need this environment variable set up?

I use the Sun JDK myself, so my /etc/profile reads as: -

export PATH=/usr/local/java/bin:$PATH
export JAVA_HOME=/usr/local/java

Compile with: - javac -cp .[:<any .jar libraries you want to include] *.java
Run with: - java -cp .[:<any .jar libraries you want to include] <Java program name>
Old 03-12-2010, 11:07 AM   #3
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Hi -

Actually, I generally recommend that you:

1. Uninstall Gnu java
2. Download and install the Sun JDK (which includes compiler, runtime and the NetBeans IDE).

At a minimum, I would *definitely* recommend configuring Java with "alternatives":


[mirandam@charon ~]$ sudo /usr/sbin/alternatives --install /usr/bin/java java /opt/jre1.6/bin/java 2
[mirandam@charon ~]$ echo 2 | sudo /usr/sbin/alternatives --config java

[mirandam@charon ~]$ java -version
java version "1.6.0_03"
Java(TM) SE Runtime Environment (build 1.6.0_03-b05)
Java HotSpot(TM) Client VM (build 1.6.0_03-b05, mixed mode, sharing)
<= This example shows how to configure "Sun JDK" as the default
'Hope that helps .. PSM

I completely agree with arashi256: the Sun JDK is definitely the right choice. For many different reasons...

Last edited by paulsm4; 03-12-2010 at 11:09 AM.



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