- Download
he 32bit or 64bit Linux "compressed binary file" - it has a ".tar.gz"
file extension i.e. "[java-version]-i586.tar.gz" for 32bit and
"[java-version]-x64.tar.gz" for 64bit
- Uncompress it
tar -xvf jdk-7u2-linux-i586.tar.gz (32bit)
tar -xvf jdk-7u2-linux-x64.tar.gz (64bit)
JDK 7 package is extracted into ./jdk.1.7.0_02 directory. N.B. check
carefully this folder name since Oracle seem to change this
occasionally with each update.
- Now move the JDK 7 directory to
/usr/lib
sudo mkdir -p /usr/lib/jvm
sudo mv ./jdk.1.7.0_02 /usr/lib/jvm/jdk1.7.0
sudo update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/jdk1.7.0/bin/java" 1
sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/lib/jvm/jdk1.7.0/bin/javac" 1
sudo update-alternatives --install "/usr/bin/javaws" "javaws" "/usr/lib/jvm/jdk1.7.0/bin/javaws" 1
- Correct the file ownership and the permissions of the executables:
sudo chmod a+x /usr/bin/java
sudo chmod a+x /usr/bin/javac
sudo chmod a+x /usr/bin/javaws
sudo chown -R root:root /usr/lib/jvm/jdk1.7.0
N.B. remember - Java JDK has many more executables that you can similarly install as above.
java,
javac,
javaws are probably the most frequently required.
This
answer lists the other executables available.
sudo update-alternatives --config java
You will see output similar one below - choose the number of jdk1.7.0 - for example
3 in this list:
$sudo update-alternatives --config java
There are 3 choices for the alternative java (providing /usr/bin/java).
Selection Path Priority Status
————————————————————
* 0 /usr/lib/jvm/java-6-openjdk/jre/bin/java 1061 auto mode
1 /usr/lib/jvm/java-6-openjdk/jre/bin/java 1061 manual mode
2 /usr/lib/jvm/java-6-sun/jre/bin/java 63 manual mode
3 /usr/lib/jvm/jdk1.7.0/jre/bin/java 3 manual mode
Press enter to keep the current choice[*], or type selection number: 3
update-alternatives: using /usr/lib/jvm/jdk1.7.0/jre/bin/java to provide /usr/bin/java (java) in manual mode.
Check the version of you new JDK 7 installation:
java -version
java version “1.7.0”
Java(TM) SE Runtime Environment (build 1.7.0-b147)
Java HotSpot(TM) Client VM (build 21.0-b17, mixed mode)
Repeat the above for:
sudo update-alternatives --config javac
sudo update-alternatives --config javaws
Enable mozilla firefox plugin:
32 bit:
ln -s /usr/lib/jvm/jdk1.7.0/jre/lib/i386/libnpjp2.so ~/.mozilla/plugins/
64 bit:
ln -s /usr/lib/jvm/jdk1.7.0/jre/lib/amd64/libnpjp2.so ~/.mozilla/plugins/
N.B. you can link the plugin (
libnpjp2.so) to
/usr/lib/firefox/plugins/ for a system wide installation
Depending on your configuration, you might need to update the
apparmor profile for firefox (or other browsers) in
/etc/apparmor.d/abstractions/ubuntu-browsers.d/java
# Replace the two lines:
# /usr/lib/jvm/java-*-sun-1.*/jre/bin/java{,_vm} cx -> browser_java,
# /usr/lib/jvm/java-*-sun-1.*/jre/lib/*/libnp*.so cx -> browser_java,
# with those (or adapt to your new jdk folder name)
/usr/lib/jvm/jdk*/jre/bin/java{,_vm} cx -> browser_java,
/usr/lib/jvm/jdk*/jre/lib/*/libnp*.so cx -> browser_java,
Then restart apparmor:
sudo /etc/init.d/apparmor restart
Confirm that the JRE has been successful by using the
official oracle website.
got it from here
