How to install jdk1.8 under linux system

1. First download jdk1.8 from the official website

2. jdk configuration

Edit the profile in the etc directory and enter sudo vim etc/profile

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Press Enter to get the following picture:

3. Press i or insert to insert the following content at the end of the file

Note that you only need to change the path of Javah_home

#Java Env
export JAVA_HOME=/usr/jdk1.8.0_121
export CLASSPATH=.:JAVAHOME/lib/dt.jar:JAVA_HOME/lib/dt.jar:JAVA 
H
 OME/lib/dt.jar:JAVA_HOME/lib/tools.jar
export PATH=PATH:PATH:PATH:JAVA_HOME/bin

Get the following picture:

##After inserting, press Esc to exit editing, enter: wq and press Enter

4. Finally enter

Java -version to check whether it is configured properly

Complete!

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