RHEL安装配置JAVA详解程序员

查看当前java版本

[[email protected] ~]# java -version 
java version "1.6.0_24" 
OpenJDK Runtime Environment (IcedTea6 1.11.1) (rhel-1.45.1.11.1.el6-x86_64) 
OpenJDK 64-Bit Server VM (build 20.0-b12, mixed mode) 

卸载JAVA

#rpm -qa|grep java 
#rpm -e --nodeps java-1.7.0-openjdk 

安装JDK7.0

#rpm -ivh jdk-7u67-linux-x64.rpm 
jdk的安装目录为：/usr/java/jdk1.7.0_67 

配置java环境

[[email protected] root]#vi /etc/profile  
 
然后在文件的末尾加上以下三句话  
export JAVA_HOME=/usr/java/jdk1.7.0_67 
export CLASSPATH=.:$JAVA_HOME/lib:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar  
export PATH=$PATH:$JAVA_HOME/bin  
 
 

使配置生效

#source /etc/profile  
 

测试

#echo $JAVA_HOME 
/usr/java/jdk1.7.0_67