
Install JDK 8 on Ubuntu
Installing step by step Oracle JDK 8 on Ubuntu GNU/Linux:
Step 1: Download the Oracle JDK 8 tar file from here.
Step 2: Open the terminal and extract the tar file.
tar -xvzf jdk-8-linux-x64.tar.gz
Step 3: Create jvm folder in /usr/lib, if jvm folder not exist.
sudo mkdir /usr/lib/jvm
Step 4: Move extracted JDK 8 folder to this location.
sudo mv jdk1.8.0 /usr/lib/jvm/jdk1.8.0
Step 5: Install new Java source in system.
sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk1.8.0/bin/javac 1 sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk1.8.0/bin/java 1 sudo update-alternatives --install /usr/bin/javaws javaws /usr/lib/jvm/jdk1.8.0/bin/javaws 1
Step 6: Choose default Java.
sudo update-alternatives --config javac sudo update-alternatives --config java sudo update-alternatives --config javaws
Step 7: Test the Java version.
java -version # java version "1.8.0" # Java(TM) SE Runtime Environment (build 1.8.0-b132) # Java HotSpot(TM) 64-Bit Server VM (build 25.0-b70, mixed mode)
Step 8: Verify the symlinks all point to the new Java location.
ls -la /etc/alternatives/java*
Step 9: Enable Java plugin for Mozilla Firefox (even for Chrome)
# for 64-Bit JDK sudo ln -s /usr/lib/jvm/jdk1.8.0/jre/lib/amd64/libnpjp2.so /usr/lib/mozilla/plugins # for 32-Bit JDK sudo ln -s /usr/lib/jvm/jdk1.8.0/jre/lib/i386/libnpjp2.so /usr/lib/mozilla/plugins
Step 10: Some tools require JAVA_HOME variable. You can set JAVA_HOME variable on Ubuntu with following options (1. option recommended!)
- Option with /etc/environment:
sudo gedit /etc/environment # add the following line, save and exit JAVA_HOME=/usr/lib/jvm/jdk1.8.0 # Load the variables source /etc/environment
- Option with .bashrc: in your home directory
sudo gedit .bashrc # add the following lines, save and exit export JAVA_HOME=/usr/lib/jvm/jdk1.8.0 export PATH=$JAVA_HOME/bin:$PATH
Original post is from my old devsniper.com blog!