Centos 6 安装java1.8

ustbwang

　　@centos6 install jdk8

　　After a long wait, finally Java SE Development Kit 8 is available to download. JDK 8 has been>

　　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># 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/8u144-b01/090f390dda5b47b9b721c7dfaa008135/jdk-8u144-linux-x64.tar.gz"
　　

　　
# tar xzf jdk-8u144-linux-x64.tar.gz
Step 2 – Install Java 8 with>
　　After extracting archive file use alternatives command to install it.># cd /opt/jdk1.8.0_144/　　
# alternatives --install /usr/bin/java java /opt/jdk1.8.0_144/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_91/bin/java4           /opt/jdk1.8.0_144/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 --install/usr/bin/jarjar /opt/jdk1.8.0_144/bin/jar 2　　
# alternatives --install/usr/bin/javacjavac /opt/jdk1.8.0_144/bin/javac 2
　　
# alternatives --setjar/opt/jdk1.8.0_144/bin/jar
　　
# alternatives --setjavac/opt/jdk1.8.0_144/bin/javac
Step 3 – Check Installed Java Version
　　Check the installed Java version on your system using following command.
root@tecadmin ~# java -version　　

　　
java version "1.8.0_144"
　　
Java(TM) SE Runtime Environment (build 1.8.0_144-b01)
　　
Java HotSpot(TM) 64-Bit Server VM (build 25.144-b01, 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 Variable
  

# export JAVA_HOME=/opt/jdk1.8.0_144Setup JRE_HOME Variable# export JRE_HOME=/opt/jdk1.8.0_144/jreSetup PATH Variable# export PATH=$PATH:/opt/jdk1.8.0_144/bin:/opt/jdk1.8.0_144/jre/bin　　Also put all above environment variables in /etc/environment file for auto loading on system boot.