Download java from here
http://www.oracle.com/technetwork/java/javase/downloads/jdk-7u3-download-1501626.html
Install the JDK
- 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 ./jdk1.7.0_02 directory.
- Now move the JDK 7 directory to
/usr/lib
sudo mv ./jdk1.7.0_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
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/