Android Automotive开发之一《环境: JDK7&JDK8切换 》

http://ubuntuhandbook.org/index.php/2015/01/install-openjdk-8-ubuntu-14-04-12-04-lts/

安装OpenJDK8

sudo add-apt-repository ppa:openjdk-r/ppa
sudo apt-get update
sudo apt-get install openjdk-8-jdk

切换方法

sudo update-alternatives --config java
sudo update-alternatives --config javac

如果是下载的安装包，不是apt-get install，可以这样配置

1. 配置环境变量，在文件etc/profile中添加：
set java environmentexport JAVA_HOME=/usr/local/jdk1.8.0_91
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH

2. 安装
sudo update-alternatives --install /usr/bin/java java /usr/local/jdk1.8.0_91/bin/java 300
sudo update-alternatives --install /usr/bin/javac javac /usr/local/jdk1.8.0_91/bin/javac 300 

也可以remove

sudo update-alternatives --remove java /usr/local/jdk1.8.0_91/bin/java
sudo update-alternatives --remove javac /usr/local/jdk1.8.0_91/bin/javac