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obysr
Asked: 2012-03-30 16:30:24 +0800 CST

How to Upgrade Oracle JDK and remove old JDK settings

  • 772

i searched and not found how to upgrade oracle jdk in here. I'm not satisfied with OpenJDK7 because it doesn't come with Java Compiler.

I have installed and configured Sun Java SDK 6 and I want to upgrade to Oracle JDK 7. I searched ppa's from launchpad an wubp8 but it didn't worked . How can I upgrade Sun JDK 6 to Oracle JDK 7 and also completely remove all Sun JDK 6 settings?

I'm very grateful for your answers.

java oracle

3 Answers

  1. Upgrade may cause problems , so its better to do a fresh install.

    Completely remove Open-jdk

    just use this simple commands in terminal to remove open jdk completely 

    sudo apt-get purge openjdk-\*

    How to install Oracle-Java

    To get an automatically update-able Java from Oracle, you can you use the PPA provided from webup8.

    sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java7-installer

    Installing Oracle Java manually

    For installing Latest Oracle Java:

    To check ubuntu system architecture installed 

    $ uname -m

    or

    $ arch

    Download the Oracle Java JDK for Linux. Make sure you select the correct compressed binaries for your system architecture 32-bit or 64-bit (which end in tar.gz).It will be downloaded in Downloads folder in home.So first open nautilus with sudo as

    sudo nautilus

    and make a folder java under 

    /usr/local/

    and then folow the following commands:

    cd /home/"your_user_name"/Downloads
sudo cp -r jdk-7u40-linux-x64.tar.gz /usr/local/java
cd /usr/local/java
sudo chmod a+x jdk-7u40-linux-x64.tar.gz
sudo tar xvzf jdk-7u40-linux-x64.tar.gz

    At this point you should have two uncompressed binary directories in /usr/local/java check it by

    ls -a

    Now edit the system path file by

    sudo gedit /etc/profile

    scroll down to the last and add following lines

    JAVA_HOME=/usr/local/java/jdk1.7.0_40
PATH=$PATH:$HOME/bin:$JAVA_HOME/bin
export JAVA_HOME
export PATH

    Save and exit and write these commands in terminal to Inform your Ubuntu Linux system where your Oracle Java JDK/JRE is located.

    sudo update-alternatives --install "/usr/bin/java" "java" "/usr/local/java/jdk1.7.0_40/bin/java" 1
sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/local/java/jdk1.7.0_40/bin/javac" 1
sudo update-alternatives --install "/usr/bin/javaws" "javaws" "/usr/local/java/jdk1.7.0_40/bin/javaws" 1
sudo update-alternatives --set java /usr/local/java/jdk1.7.0_40/bin/java
sudo update-alternatives --set javac /usr/local/java/jdk1.7.0_40/bin/javac
sudo update-alternatives --set javaws /usr/local/java/jdk1.7.0_40/bin/javaws
. /etc/profile

    Now everything is installed just check it by 

    java -version

    the output must be like

    java version "1.7.0_40"
Java(TM) SE Runtime Environment (build 1.7.0_40-b40)
Java HotSpot(TM) Server VM (build 23.1-b03, mixed mode)

    Congratulation now its installed.

    • 3

  2. Please follow one of the suggested answers in the following Ask Ubuntu question:

    How do I install Oracle Java JDK 7?

    this should be able to update your jdk6 to jdk7.

    My version is: 1.7.0_03

    • 0

  3. First uninstall:

    sudo apt-get purge openjdk-7-jre

    Here you go to install the latest Java version 8 on Ubuntu, both JRE and JDK:

    sudo add-apt-repository ppa:webupd8team/java

sudo apt-get update

sudo apt-get -f upgrade

sudo apt-get autoremove

sudo apt-get install oracle-java8-installer
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