CentOS 7 linux 卸载和安装JDK
#JAVA_HOME=/usr/java/jdk1.6.0_45;export JAVA_HOME JAVA_HOME=/usr/java/jdk1.7.0_79;export JAVA_HOME #CLASSPATH=$JAVA_HOME/lib;export CLASSPATH CLASSPATH=$JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/dt.jar;export CLASSPATH PATH=$JAVA_HOME/bin:$PATH;export PATH JRE=$JAVA_HOME/jre;export JRE
Root login !
[root@localhost ~]# rpm -qa|grep jdk
java-1.8.0-openjdk-1.8.0.45-30.b13.el7_1.x86_64
java-1.7.0-openjdk-1.7.0.79-2.5.5.2.el7_1.x86_64
java-1.7.0-openjdk-headless-1.7.0.79-2.5.5.2.el7_1.x86_64
java-1.7.0-openjdk-devel-1.7.0.79-2.5.5.2.el7_1.x86_64
java-1.8.0-openjdk-headless-1.8.0.45-30.b13.el7_1.x86_64
jdk-1.6.0_45-fcs.x86_64
java-1.8.0-openjdk-devel-1.8.0.45-30.b13.el7_1.x86_64
[root@localhost ~]# rpm -e jdk-1.6.0_45-fcs.x86_64
[root@localhost java]# rpm -ivh jdk-7u79-linux-x64.rpm
[root@localhost java]# cd jdk1.7.0_79/
[root@localhost jdk1.7.0_79]# vi /home/latte/.bashrc
[root@localhost jdk1.7.0_79]# source /home/latte/.bashrc
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JAVA_HOME=/usr/java/jdk1.7.0_79;export JAVA_HOME
CLASSPATH=$JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/dt.jar;export CLASSPATH
PATH=$JAVA_HOME/bin:$PATH;export PATH
JRE=$JAVA_HOME/jre;export JRE
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