How to install java 7 on your linux. Below you will find Debian and oracle (former sun) java 7.
At the moment there is no official debian (and linux at all) package (de) for java 7 and
apt-get is not working for us, like previously with open jdk.
Firstly we have to download the latest java from oracle site and then extract it.
wget http://download.oracle.com/otn-pub/java/jdk/7/jdk-7-linux-x64.tar.gz
tar zxvf jdk-7-linux-x64.tar.gz -C /usr/lib64/jvm/
Then we have to do some configuration.
Debian Linux has useful script to maintain different version of one programs like java called update-altenatives. So i simply use this.
update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk1.7.0/bin/java 1065
update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk1.7.0/bin/javac 1065
Where 1065 is a given priority.
To check my installation i use --config paramter
update-alternatives --config java
#this prints:
There are 2 choices for the alternative java (providing /usr/bin/java).
Selection Path Priority Status
------------------------------------------------------------
* 0 /usr/lib/jvm/jdk1.7.0/bin/java 1065 auto mode
1 /usr/lib/jvm/java-6-openjdk/jre/bin/java 1061 manual mode
2 /usr/lib/jvm/jdk1.7.0/bin/java 1065 manual mode</pre></code></pre>
And because 1065 is higher than 1061, the fresh installed java 7 will be used by default on my machine
java -version
#prints:
java version "1.7.0"
Java(TM) SE Runtime Environment (build 1.7.0-b147)
Java HotSpot(TM) 64-Bit Server VM (build 21.0-b17, mixed mode)
Hope this save somebody some setup time.