下載jdk-8u25-linux-i586.tar.gz
sudo tar zxvf jdk-8u25-linux-i586.tar.gz -C /usr/lib/jvm
export JAVA_HOME=/usr/lib/jvm/jdk1.8.0_25
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH
sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk1.8.0_25/bin/javac 300
結果:
zrc@ubuntu:/usr/lib/jvm$ java -version
java version "1.8.0_25"
Java(TM) SE Runtime Environment (build 1.8.0_25-b17)
Java HotSpot(TM) Client VM (build 25.25-b02, mixed mode)