Centos SUN JDK Installation

1. Remove the extra JDK

Rpm-qa | grep ' JAVA|GCJ ' | Xargs-t-I {} rpm-e--nodeps {}

RPM-E--nodeps *

Rpm-qa|grep JDK

RPM-E--nodeps *

Rpm-qa |grep GCJ

Rpm-qa |grep *

2. Download jdk-*.tar.gz from Oracle website

3. Extract tar.gz files, then copy to/usr/lib/jvm/

4. Configure Update-alternatives

Update-alternatives--install/usr/bin/java Java/usr/lib/jvm/jdk1.7.0_80/bin/java 300

Update-alternatives--install/usr/bin/javac Javac/usr/lib/jvm/jdk1.7.0_80/bin/javac 300

5. Configure Environment variables

VI ~/.bash_profile

Export java_home=/usr/lib/jvm/jdk1.7.0_80
Export JRE_HOME=/USR/LIB/JVM/JDK1.7.0_80/JRE
Export classpath=.: $JAVA _home/bin/dt.jar: $JAVA _home/lib/tools.jar: $CLASSPATH
Export path= $JAVA _home/bin/: $PATH: $HOME/bin