Linux: debian/ubuntu下安装和使用Java 8

7行命令解决问题：

su -echo "deb /webupd8team/java/ubuntu xenial main" | tee /etc/apt/sources.list.d/webupd8team-java.listecho "deb-src /webupd8team/java/ubuntu xenial main" | tee -a /etc/apt/sources.list.d/webupd8team-java.listapt-key adv --keyserver hkp://:80 --recv-keys EEA14886apt-get updateapt-get install oracle-java8-installerjava -version

Java 11的安装参考这篇文章：Linux: debian/ubuntu下安装和使用Java