Linux下的JDK环境配置

1. In CentOS, redhat serials linux OS, just save the following configuration in /etc/profile,
  export JAVA_HOME="/usr/java/jdk1.6"
 export JRE_HOME="$JAVA_HOME/jre"
 export JAVA_PATH="$JAVA_HOME"
 export TOMCAT_HOME="/usr/tomcat6"
 export PATH="$PATH:$JAVA_HOME:$JAVA_HOME/bin:$JRE_HOME/bin"

2. for related jdk and jre files, you need to install or copy them under this directory.
 export JAVA_HOME="/usr/java/jdk1.6.0_16"
 export JRE_HOME="$JAVA_HOME/jre"
 export JAVA_PATH="$JAVA_HOME"
 export PATH="$PATH:$JAVA_HOME:$JAVA_HOME/bin:$JRE_HOME/bin"

 

Before that, copy all jdk files under a specified folder, let's say "/usr/java/jdk1.6".

Then set the jdk version and runtime environment as belowing:

alternatives \
     --install /usr/bin/java java /usr/java/jdk1.6/jre/bin/java 10 \
     --slave /usr/bin/rmiregistry rmiregistry \
         /usr/java/jdk1.6/jre/bin/rmiregistry \
     --slave /usr/lib/jvm/jre jre /usr/java/jdk1.6/jre

alternatives --set java /usr/java/jdk1.6/jre/bin/java
alternatives --set rmiregistry /usr/java/jdk1.6/jre/bin/rmiregistry
alternatives --set jre /usr/java/jdk1.6/jre