How to config Oracle java on your Ubuntu
install via ppa source
sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java8-installer
sudo update-java-alternatives -s java-8-oracle
install via jdk gz downloaded from Oracle
sudo mkdir /usr/lib/jvm
sudo tar -zxvf jdk-8u121-linux-i586.tar.gz -C /usr/lib/jvm
sudo vim ~/.bashrc
#set oracle jdk environment
export JAVA_HOME=/usr/lib/jvm/java-8-oracle ## change to your jdk folder
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH
source ~/.bashrc
sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/java-8-oracle/bin/java 300
sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/java-8-oracle/bin/javac 300
sudo update-alternatives --install /usr/bin/jar jar /usr/lib/jvm/java-8-oracle/bin/jar 300
sudo update-alternatives --install /usr/bin/javah javah /usr/lib/jvm/java-8-oracle/bin/javah 300
sudo update-alternatives --install /usr/bin/javap javap /usr/lib/jvm/java-8-oracle/bin/javap 300
sudo update-alternatives --config java
chose your jdk path.
sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java8-installer
sudo update-java-alternatives -s java-8-oracle
install via jdk gz downloaded from Oracle
sudo mkdir /usr/lib/jvm
sudo tar -zxvf jdk-8u121-linux-i586.tar.gz -C /usr/lib/jvm
sudo vim ~/.bashrc
#set oracle jdk environment
export JAVA_HOME=/usr/lib/jvm/java-8-oracle ## change to your jdk folder
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH
source ~/.bashrc
sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/java-8-oracle/bin/java 300
sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/java-8-oracle/bin/javac 300
sudo update-alternatives --install /usr/bin/jar jar /usr/lib/jvm/java-8-oracle/bin/jar 300
sudo update-alternatives --install /usr/bin/javah javah /usr/lib/jvm/java-8-oracle/bin/javah 300
sudo update-alternatives --install /usr/bin/javap javap /usr/lib/jvm/java-8-oracle/bin/javap 300
sudo update-alternatives --config java
chose your jdk path.
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