CentOS add Java environment variables and delete OpenJDK

Export Java_home=/opt/java/jdk1.8.0_172export classpath=.: $JAVA _home/jre/lib/rt.jar: $JAVA _home/lib/dt.jar: $JAVA _ Home/lib/tools.jarexport path= $PATH: $JAVA _home/bin

　　

Delete OpenJDK

The installed CentOS will bring openjdk, with the command java-version, will have the following information:

" 1.6.0 "  1.6. 0-1.6. 0-b09, mixed mode)

It is best to uninstall the OPENJDK before installing Sun's JDK.

View First

Rpm-qa | grep java

The following information is displayed:

Java-1.4.2-gcj-compat-1.4.2.0-40jpp.115java-1.6.0-openjdk-1.6.0.0-1.7.b09.el5

Unloading:

Rpm-e--nodeps java-1.4.2-gcj-compat-1.4.2.0-40jpp.115rpm-e--nodeps java-1.6.0-openjdk-1.6.0.0-1.7.b09.el5

There are some other commands.

Rpm-qa | grep Gcjrpm-qa | grep JDK

If OpenJDK source cannot be found, you can also uninstall this

Yum-y Remove Java java-1.4.2-gcj-compat-1.4.2.0-40jpp.115yum-y remove Java java-1.6.0-openjdk-1.6.0.0-1.7.b09.el5

　　

CentOS add Java environment variables and delete OpenJDK