JDK Management on Linux

Check to see if the CentOS JDK is installed.

Yum List installed |grep java.

If you have a JDK with your own installation, uninstall the CentOS system from your Java environment?

Yum-y Remove java-1.7.0-openjdk*.

Yum-y Remove Tzdata-java.noarch.

When the results are displayed as complete! The uninstallation is complete.

Note: "*" means uninstalling all OPENJDK related files for Java 1.7.0.

View the Java installation package in the Yum Library.

Yum-y list java*.

Install the Java environment using Yum.

Yum-y install java-1.7.0-openjdk*, take java-1.7.0 in the Yum repository as an example.

When the results are displayed as complete! The installation is complete.

Note: "*" means that all relevant Java programs for java-1.7.0 are installed.

View the Java version information you just installed.

Java-version can view Java version;

JDK Management on Linux