For 64 Bit:-
# cd /opt/ # wget --no-cookies --no-check-certificate --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" "http://download.oracle.com/otn-pub/java/jdk/7u79-b15/jdk-7u79-linux-x64.tar.gz" # tar xzf jdk-7u79-linux-x64.tar.gz
For 32 Bit:-
# cd /opt/ # wget --no-cookies --no-check-certificate --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" "http://download.oracle.com/otn-pub/java/jdk/7u79-b15/jdk-7u79-linux-i586.tar.gz" # tar xzf jdk-7u79-linux-i586.tar.gz
# cd /opt/jdk1.7.0_79/ # alternatives --install /usr/bin/java java /opt/jdk1.7.0_79/bin/java 2 # alternatives --config java
There are 3 programs which provide 'java'. Selection Command ----------------------------------------------- * 1 /opt/jdk1.7.0_60/bin/java + 2 /opt/jdk1.7.0_72/bin/java 3 /opt/jdk1.7.0_79/bin/java Enter to keep the current selection[+], or type selection number: 3 [Press Enter]
원하는 jdk버전 설정
# alternatives --install /usr/bin/jar jar /opt/jdk1.7.0_79/bin/jar 2 # alternatives --install /usr/bin/javac javac /opt/jdk1.7.0_79/bin/javac 2 # alternatives --set jar /opt/jdk1.7.0_79/bin/jar # alternatives --set javac /opt/jdk1.7.0_79/bin/javac
# java -version java version "1.7.0_79" Java(TM) SE Runtime Environment (build 1.7.0_79-b15) Java HotSpot(TM) 64-Bit Server VM (build 24.79-b02, mixed mode)
Configuring Environment Variables
Most of Java based application’s uses environment variables to work. Use following commands to set up these variable properly. It’s also good to add following commands to any start-up script like ~/.bashrc or ~/.bash_profile.
- Setup JAVA_HOME Variable
# export JAVA_HOME=/opt/jdk1.7.0_79
# export JRE_HOME=/opt/jdk1.7.0_79/jre
# export PATH=$PATH:/opt/jdk1.7.0_79/bin:/opt/jdk1.7.0_79/jre/bin
#vi /etc/profile
export JAVA_HOME=/usr/java/jdk1.7
export PATH=$JAVA_HOME/bin:$PATH
export CLASSPATH=$CLASSPATH:$JAVA_HOME/jre/lib/ext:$JAVA_HOME/lib/tools.jar
#source /etc/profile
