安装：
sudo apt-get update sudo apt-get install openjdk-8-jdk
查看java版本
java -version openjdk version "1.8.0_181" OpenJDK Runtime Environment (build 1.8.0_181-8u181-b13-1ubuntu0.16.04.1-b13) OpenJDK Server VM (build 25.181-b13, mixed mode)
安装：
sudo apt-get update sudo apt-get install openjdk-8-jdk
查看java版本
java -version openjdk version "1.8.0_181" OpenJDK Runtime Environment (build 1.8.0_181-8u181-b13-1ubuntu0.16.04.1-b13) OpenJDK Server VM (build 25.181-b13, mixed mode)
