(个人)CentOS的JDK安装

rpm -qa | grep java

java-1.7.0-openjdk-1.7.0.9-2.3.4.1.el6_3.x86_64
java-1.6.0-openjdk-1.6.0.0-1.50.1.11.5.el6_3.x86_64
java-1.6.0-openjdk-devel-1.6.0.0-1.50.1.11.5.el6_3.x86_64
tzdata-java-2012j-1.el6.noarch
libvirt-java-devel-0.4.9-1.el6.noarch
libvirt-java-0.4.9-1.el6.noarch
java-1.7.0-openjdk-devel-1.7.0.9-2.3.4.1.el6_3.x86_64

rpm -e --nodeps xxx

rpm -e --nodeps java-1.7.0-openjdk-1.7.0.9-2.3.4.1.el6_3.x86_64
rpm -e --nodeps java-1.6.0-openjdk-1.6.0.0-1.50.1.11.5.el6_3.x86_64

cd ../
cd /usr
mkdir /java

mv /back/jdk-8u144-linux-x64.tar.gz /usr/java   ---将jdk的安装包移动到目录中
tar -zxvf jdk-8u144-linux-x64.tar.gz

vim /etc/profile 

#set java enviroment 
JAVA_HOME=/usr/java/jdk1.8.0_144
JRE_HOME=/usr/java/jdk1.8.0_114/jre
CLASS_PATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib
PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin
export JAVA_HOME JRE_HOME CLASS_PATH PATH

source /etc/profile

java -version