This is the most basic, but it is always checked and checked.
First, Download jdk8
Address: http://www.oracle.com/technetwork/java/javase/downloads/index.html
Two. Log on to Linux and switch to root users.
[cjh@localhost ~]$ su root
Password:
Three, set up Java installation directory in usr directory.
[root@localhost local]# cd /usr/local
[root@localhost local]# mkdir java
Four, cut the compressed packet to the Java directory and decompress it.
mv jdk-8u162-linux-x64.tar.gz java
tar -zxvf jdk-8u162-linux-x64.tar.gz
Get a folder jdk1.8.0_162
Five, edit configuration files, configure environment variables
vi /etc/profileAfter entering the letter A or I, you can enter the edit state and add the following variables into the file.
JAVA_HOME=/usr/local/java/jdk1.8.0_162
CLASSPATH=$JAVA_HOME/lib/
PATH=$PATH:$JAVA_HOME/bin
export PATH JAVA_HOME CLASSPATH
Finally, don’t forget to save and press ESC-> input: WQ (save and exit).
Note: (1) under Windows; number Linux is: (2) Linux under Windows is /
Six. Restart the machine or execute the command.
source /etc/profile
Seven. Check installation status.
[root@localhost java]# java -version