Roshan Book

My Tech Notebook

Installing Oracle JDK 7 On ubuntu


  • 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

  • Now run
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
  • Run
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

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