The Guide shows you Step-by-Step How to Install Oracle-Sun Java JDK 7 64-bit Release for Fedora 18 KDE4 x8664 Desktop.
After Installing you will need to Use the update-alternatives Tool to Update your System Java to Sun SE JDK 7.
Especially relevant: at the Same Time I’m also illustrating here How to Install the New Downloaded .rpm Packages with Dependencies on Fedora 18 KDE4 Desktop :)
The Screenshots of Installation Correspond to the Install on a Fedora 18 KDE4 Desktop but the Procedure on GNOME, XFCE… Should be Near Identical.
Take the Time of Carefully Reading and Executing the Instructions Contained Here and All should Work Like a Breeze.
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Download Java JDK 7:
Oracle JDK x64 tar.gz -
Double-Click on Archive and Extract into /tmp
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Open Terminal Window
(Press “Enter” to Execute Commands)
In case first see: Terminal QuickStart Guide.
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Relocate Oracle Java JDK
su
If Got “User is Not in Sudoers file” then see: How to Enable sudo
if [ ! -d "/usr/lib/jvm" ]; then mkdir /usr/lib/jvm; fi
The above command is used to create a jvm directory if not already there.
sudo chown -R root:root /tmp/jdk1.7*
Reiterate the Execution Permission over the Java binaries
chmod -R +x /tmp/jdk1.7*/bin
Finally, Shift the Java contents with
mv /tmp/jdk1.7* /usr/lib/jvm/
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Updating System Java to Oracle JDK
update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk1.7*/bin/java 1065
update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk1.7*/bin/javac 1065
update-alternatives --install /usr/bin/jar jar /usr/lib/jvm/jdk1.7*/bin/jar 1065
update-alternatives --install /usr/bin/javaws javaws /usr/lib/jvm/jdk1.7*/bin/javaws 1065
Checking or Setting the System Java Version in Use with.
update-alternatives --config java
And for the Java Compiler instead:
sudo update-alternatives --config javac
To Switch of Java Version Just Enter the Reference Number on First, Column. :)
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Optionally Set Java Environment Variable.
su <myUser>
nano $HOME/.bashrc
Append:
export JAVA_HOME=/usr/lib/jvm/jdk1.<X.Y_uZ>
Ctrl+x to Save & Exit from nano :)
source $HOME/.bashrc
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How to Install Oracle Java Browser Plug-In:
Guides to Installing the Tomcat 7 Server on Linux: