manjaro上安装jdk 11（最新openjdk java）

[1] 安装

pacman -S jdk-openjdk

[2] check下是否成功

archlinux-java status

输出：

java-11-openjdk
java-8-openjdk/jre (default)

[3] 上面看出，默认java8 ，切换为java11

archlinux-java set  java-11-openjdk

[4] java -version

openjdk version "11.0.2" 2018-10-16
OpenJDK Runtime Environment (build 11.0.2+7)
OpenJDK 64-Bit Server VM (build 11.0.2+7, mixed mode)

[5] 安装maven

pacman -S maven
mvn -v