Uninstalling the Linux system comes with the JDK and installs its own JDK

Confirm the specific version number of the JDK first

[Email protected] jdk1.8.0_144]# Rpm-qa | grep JDK

Uninstalling the JDK

Install your own JDK

Create the Java directory under the/usr/directory (I am already under the/usr/local path)

Download the JDK and unzip it to the/usr/local/java path

[Email protected] root]# TAR-ZXVF jdk-8u144-linux-x64.tar.gz

[Email protected] root]# MV jdk-8u144-linux-x64/usr/local/java/

Setting environment variables

Let the changes take effect:

Verifying JDK validity

Uninstalling the Linux system comes with the JDK and installs its own JDK