Linux: debian/ubuntu下安装和使用Java 11
只需6行命令：
su -echo "deb /linuxuprising/java/ubuntu bionic main" | tee /etc/apt/sources.list.d/linuxuprising-java.listapt-key adv --keyserver hkp://:80 --recv-keys 73C3DB2Aapt-get updateapt-get install oracle-java11-installer
-> # java --versionjava 11.0.2 -01-15 LTSJava(TM) SE Runtime Environment 18.9 (build 11.0.2+9-LTS)Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11.0.2+9-LTS, mixed mode)
-8-1更新：这个方法已经不行了，如果想要安装oracle的java 11，推荐从官网直接下载进行安装
参考文章：How To Install Oracle Java 11 In Ubuntu, Linux Mint Or Debian (From PPA Repository) - Linux Uprising Blog
open-jdk的java 11可以直接安装：
apt search openjdksudo apt install default-jdk
-> # java --versionopenjdk 11.0.4 -07-16OpenJDK Runtime Environment (build 11.0.4+11-post-Ubuntu-1ubuntu218.04.3)OpenJDK 64-Bit Server VM (build 11.0.4+11-post-Ubuntu-1ubuntu218.04.3, mixed mode, sharing)
