1.修改apt的源信息
vim /etc/apt/sources.list.d/java-8-debian.list
2.添加源信息
deb http://ppa.launchpad.net/webupd8team/java/ubuntu trusty main deb-src http://ppa.launchpad.net/webupd8team/java/ubuntu trusty main
3.添加GPG key
apt-key adv --keyserver keyserver.ubuntu.com --recv-keys EEA14886
4.更新源并且下载oracle-java8
apt-get update apt-get install oracle-java8-installer
参考信息: https://launchpad.net/~webupd8team/+archive/ubuntu/java