默认安装的都是JDK11，安装8需要如下配置，下面是我的测试机上的history
11 echo "deb http://ppa.launchpad.net/webupd8team/java/ubuntu xenial main" | sudo tee /etc/apt/sources.list.d/webupd8team-java.list 12 echo "deb-src http://ppa.launchpad.net/webupd8team/java/ubuntu xenial main" | sudo tee -a /etc/apt/sources.list.d/webupd8team-java.list 13 sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys EEA14886 14 sudo apt-get update 15 apt list |grep jdk-8 16 apt-get install adoptopenjdk-8-hotspot
