You can completely remove the
OpenJDK
and fresh Install Oracle Java JDK
by the following steps:- Remove
OpenJDK
completely by this command:
sudo apt-get purge openjdk-\*
- Download the
Oracle Java JDK
here.
Note: download appropriate file, for example if your system is x64 Ubuntu (i.e, Debian) the download file is named like this:jdk-8u51-linux-x64.tar.gz
To find which version is your OS, check here - Create a folder named
java
in/usr/local/
by this command:
sudo mkdir -p /usr/local/java
- Copy the Downloaded file in the directory
/usr/local/java
. To do this,cd
into directory where downloaded file is located and use this command for copying that file to/usr/local/java/
:
sudo cp -r jdk-8u51-linux-x64.tar.gz /usr/local/java/
- CD into
/usr/local/java/
directory and extract that copied file by using this command:
sudo tar xvzf jdk-8u51-linux-x64.tar.gz
- After extraction you must see a folder named
jdk1.8.0_51
. - Update
PATH
file by opening/etc/profile
file by the commandsudo nano /etc/profile
and paste the following at the end of the file:
JAVA_HOME=/usr/local/java/jdk1.8.0_51 PATH=$PATH:$HOME/bin:$JAVA_HOME/bin export JAVA_HOME export PATH
- Save and exit.
- Tell the system that the new Oracle Java version is available by the following commands:
sudo update-alternatives --install "/usr/bin/java" "java" "/usr/local/java/jdk1.8.0_51/bin/java" 1 sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/local/java/jdk1.8.0_51/bin/javac" 1 sudo update-alternatives --install "/usr/bin/javaws" "javaws" "/usr/local/java/jdk1.8.0_51/bin/javaws" 1
- Make Oracle Java JDK as default by this following commands:
sudo update-alternatives --set java /usr/local/java/jdk1.8.0_51/bin/java sudo update-alternatives --set javac /usr/local/java/jdk1.8.0_51/bin/javac sudo update-alternatives --set javaws /usr/local/java/jdk1.8.0_51/bin/javaws
- Reload sytem wide PATH /etc/profile by this command:
source /etc/profile
- Reboot your system.
- Check Java JDK version by
java -version
command . If installation is succesful, it will display like the following:
java version "1.8.0_51" Java(TM) SE Runtime Environment (build 1.8.0_51-xxx) Java HotSpot(TM) Server VM (build 25.51-xxx, mixed mode)
Note: We Assumed that the downloaded file is named
jdk-8u51-linux-x64.tar.gz
and used this name in all the commands used in steps 2, 4 and 5. It may
depends on the type of O.S, processor type (i.e., 32bit or 64bit)Source: Stackoverflow.com
Reproduced here so that I don't have to find it again, I can simply refer back to my this blog.
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