After a long wait, finally Java SE Development Kit 8 is available to download. JDK 8 has been released on Mar,18 2014 for general availability with the many featured enhancements. You can find all the enhancements in JDK 8 here.
This article will help you to Install JAVA 8 (JDK 8u66) or update on your system. Read instruction carefully for downloading java from Linux command line.
Downloading 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/8u91-b14/jdk-8u91-linux-x64.tar.gz" # tar xzf jdk-8u91-linux-x64.tar.gz
# 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/8u91-b14/jdk-8u91-linux-i586.tar.gz" # tar xzf jdk-8u91-linux-i586.tar.gz
Install Java with Alternatives
After extracting archive file use alternatives command to install it. alternatives command is available in chkconfig package.
# cd /opt/jdk1.8.0_91/ # alternatives --install /usr/bin/java java /opt/jdk1.8.0_91/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_77/bin/java 4 /opt/jdk1.8.0_91/bin/java Enter 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/jar jar /opt/jdk1.8.0_91/bin/jar 2 # alternatives --install /usr/bin/javac javac /opt/jdk1.8.0_91/bin/javac 2 # alternatives --set jar /opt/jdk1.8.0_91/bin/jar # alternatives --set javac /opt/jdk1.8.0_91/bin/javac
Check Installed Java Version
Check the installed Java version on your system using following command.
[email protected] ~# java -version java version "1.8.0_91" Java(TM) SE Runtime Environment (build 1.8.0_91-b14) Java HotSpot(TM) 64-Bit Server VM (build 25.91-b14, mixed mode)
Configuring Environment Variables
Most of Java based application’s uses environment variables to work. Set the Java environment variables using following commands
- Setup JAVA_HOME Variable
# export JAVA_HOME=/opt/jdk1.8.0_91
- Setup JRE_HOME Variable
# export JRE_HOME=/opt/jdk1.8.0_91/jre
- Setup PATH Variable
# export PATH=$PATH:/opt/jdk1.8.0_91/bin:/opt/jdk1.8.0_91/jre/bin
Also put all above environment variables in /etc/environment file for auto loading on system boot.
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