This tutorial helps you to install Java 8 or update Java on your system. Read the instruction carefully before downloading Java from Linux command line. To Install Java 8 in Ubuntu and LinuxMint read This Article.
Step 1 – Download Latest Java Archive
Download latest Java SE Development Kit 8 release from its official download page or use following commands to download from shell.
cd /opt/ wget --no-cookies --no-check-certificate --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" "http://download.oracle.com/otn-pub/java/jdk/8u161-b12/2f38c3b165be4555a1fa6e98c45e0808/jdk-8u161-linux-x64.tar.gz" tar xzf jdk-8u161-linux-x64.tar.gz
Step 2 – Install Java 8 with Alternatives
After extracting archive file use alternatives command to install it. alternatives command is available in chkconfig package.
cd /opt/jdk1.8.0_161/ alternatives --install /usr/bin/java java /opt/jdk1.8.0_161/bin/java 2 alternatives --config java There are 3 programs which provide 'java'. Selection Command ----------------------------------------------- * 1 /opt/jdk1.7.0_71/bin/java + 2 /opt/jdk1.8.0_45/bin/java 3 /opt/jdk1.8.0_144/bin/java 4 /opt/jdk1.8.0_161/bin/javaEnter to keep the current selection[+], or type selection number: 4
At this point JAVA 8 has been successfully installed on your system. We also recommend to setup javac and jar commands path using alternatives
alternatives --install /usr/bin/jarjar /opt/jdk1.8.0_161/bin/jar 2 alternatives --install /usr/bin/javacjavac /opt/jdk1.8.0_161/bin/javac 2 alternatives --set jar/opt/jdk1.8.0_161/bin/jar alternatives --set javac/opt/jdk1.8.0_161/bin/javac
Step 3 – Check Installed Java Version
Check the installed Java version on your system using following command.
java -version java version " 1.8.0_161" Java(TM) SE Runtime Environment (build 1.8.0_161-b12) Java HotSpot(TM) 64-Bit Server VM (build 25.161-b12, mixed mode)
Step 4 – Setup Java Environment Variables
Most of Java based application’s uses environment variables to work. Set the Java environment variables using following commands
Setup JAVA_HOME, JRE_HOME and PATH environment variables
export JAVA_HOME=/opt/jdk1.8.0_161 export JRE_HOME=/opt/jdk1.8.0_161/jre export PATH=$PATH:/opt/jdk1.8.0_161/bin:/opt/jdk1.8.0_161/jre/bin
Also put all above environment variables in /etc/environment file for auto loading on system boot.