A quick how-to install Oracle’s JAVA 7 on Debian 7 (Wheezy).
You can have both as I have on my Debian Wheezy, the open-source version of JAVA that is known as Icedtea and the one from Oracle that I’m going to install now.
The issue for me was that the icedtea-plugin was not playing nice with DELL's DRAC Console and for my wife was that she was unable to watch some java applet played vids online.
Ok, nonetheless, let’s first make sure the system is up-to-date
apt-get update apt-get upgrade apt-get dist-upgrade
I’m using 64bit [amd64] version of Debian 7, so if you’re not, make sure you tune the commands accordingly. Also, the URLs may change, so make sure you verify that aswell . Always get the latest version from here
Download JAVA 7 from Oracle’s website using wget
wget --no-cookies \ --no-check-certificate \ --header "Cookie: oraclelicense=accept-securebackup-cookie" \ "http://download.oracle.com/otn-pub/java/jdk/7u55-b13/jdk-7u55-linux-x64.tar.gz" \ -O /tmp/jdk-7-linux-x64.tar.gz
for 32 bit system you may use
wget --no-cookies \ --no-check-certificate \ --header "Cookie: oraclelicense=accept-securebackup-cookie" \ "http://download.oracle.com/otn-pub/java/jdk/7u55-b13/jdk-7u55-linux-i586.tar.gz" \ -O /tmp/jdk-7-linux-i586.tar.gz
Unpack the downloaded JAVA 7 archive in /opt
mkdir /opt/java-oracle tar -zxf /tmp/jdk-7-linux-x64.tar.gz -C /opt/java-oracle
for 32 bit system use this instead
tar -zxf /tmp/jdk-7-linux-i586.tar.gz -C /opt/java-oracle
Set-up Oracle’s JAVA 7 to be used on the system by using higher priority with update-alternatives
JHome=/opt/java-oracle/jdk1.7.0_55
update-alternatives --install /usr/bin/java java ${JHome%*/}/bin/java 20000
update-alternatives --install /usr/bin/javac javac ${JHome%*/}/bin/javac 20000
re-check JHome=/opt/java-oracle/jdk1.7.0_55 is set to the correct directory
Verify or set Oracle’s JAVA 7 to be used as a default JAVA on the system
update-alternatives --config java There are 3 choices for the alternative java (providing /usr/bin/java). Selection Path Priority Status ------------------------------------------------------------ 0 /opt/java-oracle/jdk1.7.0/bin/java 20000 auto mode 1 /opt/java-oracle/jdk1.7.0/bin/java 20000 manual mode 2 /opt/java-oracle/jdk1.7.0_45/bin/java 20000 manual mode * 3 /opt/java-oracle/jdk1.7.0_51/bin/java 20000 manual mode 4 /usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java 1051 manual mode
check JAVA version using
java -version java version "1.7.0_55" Java(TM) SE Runtime Environment (build 1.7.0_55-b13) Java HotSpot(TM) 64-Bit Server VM (build 24.55-b03, mixed mode)
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