在 CentOS/RHEL 7/6 和 Fedora 26/25 系统里如何安装 Java 8
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/JRE 8u144) or update 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/
¶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_144/
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_144/bin/jar 2
¶Step 3 – Check Installed Java Version
Check the installed Java version on your system using following command.
root@tecadmin ~# java -version
¶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 Variable
# export JAVA_HOME=/opt/jdk1.8.0_144
- Setup JRE_HOME Variable
# export JRE_HOME=/opt/jdk1.8.0_144/jre
Also put all above environment variables in /etc/environment file for auto loading on system boot.
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