????1.ж?????openJDK.
????????#yum -y remove java
????2.????JDK.
????????????????jdk-7u79-linux-x64.rpm
????3.??????.
??????jdk-7u79-linux-x64.rpm?????/usr/java??
????4.????????????????
????#chmod +x jdk-7u79-linux-x64.rpm
????#rpm -ivh jdk-7u79-linux-x64.rpm
????5.???????????
????#vi /etc/profile
??????????
????#set java environment
????JAVA_HOME=/usr/java/jdk1.7.0_79
????CLASSPATH=.:??JAVA_HOME/lib.tools.jar
????PATH=??JAVA_HOME/bin:??PATH
??????????????
????#set java environment
????JAVA_HOME=/usr/java/jdk1.7.0_79
????PATH=$PATH:/usr/java/jdk1.7.0_79/bin //$????????PATH????????????
????CLASSPATH=./usr/java/jdk1.7.0_79/jre/lib/rt.jar
????export JAVA_HOME CLASSPATH PATH // ?м???????
?????????????
????6.????
???????? source /etc/profile ????????
????7.???JDK?????????
????#java -version
???????????JVM?汾????????????????????
????#javac
????#java
????????????????????????jdk???????????