Downloading Latest Java Archive

Download latest Java SE Development Kit 8 release from itsofficial download pageor use following commands to download from shell.

For 64Bit

# 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/8u111-b14/jdk-8u111-linux-x64.tar.gz"

# tar xzf jdk-8u111-linux-x64.tar.gz

For 32Bit

# 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/8u111-b14/jdk-8u111-linux-i586.tar.gz"

# tar xzf jdk-8u111-linux-i586.tar.gz

Note:If Above wget command does not work for you watchthis example videoto download java source archive using terminal.

Install Java with Alternatives

After extracting archive file usealternativescommand to install it. alternatives command is available inchkconfigpackage.

# cd /opt/jdk1.8.0_111/
# alternatives --install /usr/bin/java java /opt/jdk1.8.0_111/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/java
   4           /opt/jdk1.8.0_111/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_111/bin/jar 2
# alternatives --install /usr/bin/javac javac /opt/jdk1.8.0_111/bin/javac 2
# alternatives --set jar /opt/jdk1.8.0_111/bin/jar
# alternatives --set javac /opt/jdk1.8.0_111/bin/javac

Check Installed Java Version

Check the installed Java version on your system using following command.

root@tecadmin ~# java -version

java version "1.8.0_111"
Java(TM) SE Runtime Environment (build 1.8.0_111-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.111-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

• SetupJAVA_HOMEVariable

  # export JAVA_HOME=/opt/jdk1.8.0_111
  

• SetupJRE_HOMEVariable

  # export JRE_HOME=/opt/jdk1.8.0_111/jre
  

• SetupPATHVariable

  # export PATH=$PATH:/opt/jdk1.8.0_111/bin:/opt/jdk1.8.0_111/jre/bin
  

Also put all above environment variables in/etc/environmentfile for auto loading on system boot.