Installing the JDK under the Centos-linux system

In general, Linux systems have their own JDK, but do not meet development requirements, so you need to uninstall, reinstall the JDK

Step 1: View the JDK version of an existing installation

Command:

Rpm-qa | Grep-i Java

Step 2: Uninstall the existing software

Command:

RPM-E--nodeps java-1.6.0-openjdk-1.6.0.0-1.66.1.13.0.e16.i686

RPM-E--nodeps java-1.6.0-openjdk-1.6.0.0-1.66.1.13.0.e16.i686

Step 3: Unzip the JDK

Command:

TAR-ZXVF jdk-8u151-linux-i586.tar.gz

Step 4: Move the JDK to "/usr/local/src/java" and rename

Command:

MV jdk1.8.0_151/usr/local/src/java/jdk1.8

Step 5: Configure the system environment variables

Command:

Vim/etc/profile

To add related variables in the configuration file:

Export java_home=/usr/local/src/java/jdk1.8

Export path= $JAVA _home/bin: $PATH

Step 6: Make the configuration file effective and test

Command:

Source/etc/profile

Java-version

Javac

Complete!!!!!

Installing the JDK under the Centos-linux system