java jre 安装方法 FOR FEDORE
Let's begin by downloading the latest version of JRE (Java Runtime
Environment) from here
.
Just click on the Download link where it says Java Runtime
Environment (JRE) 5.0 Update
, then you�ll need to accept the license
and download the Linux self-extracting file
.By default, Fedora Core 6 systems come with an old
Java software installed, so you need to install a newer version of Java
Runtime Environment to enjoy all the Java applications out there. In
this quick guide, I will teach you how to update/install your Java
Environment.
WARNING:
Please remember to always replace the xx
from the jre-1_5_0_xx-linux-i586.bin
file with the latest version. At the moment of this guide�s writing,
the latest version was 09
, so the file should look like this: jre-1_5_0_09-linux-i586.bin
After
you have finished downloading the file, you need to move it into the /opt
folder. Open a console and type:
mv
jre-1_5_0_xx-linux-i586.bin /opt
Now, you will need to
make this file executable so you can extract it. Follow the commands
below:
cd /opt
- so you can go
into the /opt directory
chmod +x
jre-1_5_0_xx-linux-i586.bin
And now, let's run the
executable file with the following command:
./jre-1_5_0_xx-linux-i586.bin
You'll
be prompted with the License Agreement, hit space until you are asked
if you agree or not. Type Yes
and the extraction process will
begin. After the extraction process is finished, just remove the binary
file with the following command:
rm -rf
jre-1_5_0_xx-linux-i586.bin
Now, let's put the Java
plugin into your browser's plugin folder. Konqueror, Firefox and Mozilla
browsers will all look into the same folder, for plugins. So type the
following command:
ln -s
/opt/jre1.5.0_xx/plugin/i386/ns7/libjavaplugin_oji.so
/usr/lib/mozilla/plugins/libjavaplugin_oji.so
Well,
now you need to make the Java executable available for the whole system,
so you can run all the Java applications you encounter. Create the
following file with your preferred text editor:
kwrite
/etc/profile.d/java.sh
Now paste the following
options into the file, remember to enter a carriage return after these
lines, then save it. Remember to replace the xx with the latest version
you have downloaded:
export
J2RE_HOME=/opt/jre1.5.0_xx
export PATH=$J2RE_HOME/bin:$PATH
Now,
type the following command to make that file available:
source /etc/profile.d/java.sh
Then type
this command to see if the path is correct:
which
java
You will see something like this:
/opt/jre1.5.0_09/bin/java
Then type these commands:
/usr/sbin/alternatives --install /usr/bin/java java
/opt/jre1.5.0_xx/bin/java 2
/usr/sbin/alternatives
--config java
After you have entered the last
command, you'll be asked to choose which Java software you want for your
system. Just press 2 key and hit enter.
And finally, just type
this command to see if everything looks good and your system has a new
Java Environment:
/usr/sbin/alternatives
--display java
And you can also type this command to
see the version of your Java Runtime Environment:
java -version
Mine looks like this:
java
version "1.5.0_09"
Java(TM) 2 Runtime Environment, Standard Edition
(build 1.5.0_09-b01)
Java HotSpot(TM) Client VM (build 1.5.0_09-b01,
mixed mode, sharing)
You should now be able to run most of
the Java applications out there, with the commands like:
java -jar application.jar
or
javaws application.jnlp
Enjoy!
虽然是JRE但是JDK 也是可是使用这个方法安装的
或者参见
http://www.howtoforge.com/sun_java_se6sdk_netbeans_fedora7_p2
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