# ubuntu 下安装
sudo add-apt-repository ppa:linuxuprising/java
sudo apt-get update
sudo apt-get install oracle-java12-installer
sudo apt-get install oracle-java12-set-default
sudo apt-get remove oracle-java12-installer
# redhat/centos 下安装:
wget -c "https://download.oracle.com/otn-pub/java/jdk/12+33/312335d836a34c7c8bba9d963e26dc23/jdk-12_linux-x64_bin.rpm?AuthParam=1553746278_f96bcc8eb613e3b6bbe9d4533eb2829e" -O jdk-12_linux-x64_bin.rpm
rpm -ivh jdk-12_linux-x64_bin.rpm
java -version
安装就这么简单 ,具体每条命令的含义,如有需要,请自行搜索。
至于java 12的新特性,请参考官网。