如何在Debian系统安装Java

一、添加 Java 8 PPA 源

1、自动添加

sudo apt-get install software-properties-common python-software-properties
sudo add-apt-repository ppa:webupd8team/java  

2、手动添加

• 创建新的ppa文件

sudo nano /etc/apt/sources.list.d/java-8-debian.list

• 文件内容如下

deb http://ppa.launchpad.net/webupd8team/java/ubuntu trusty main
deb-src http://ppa.launchpad.net/webupd8team/java/ubuntu trusty main

• 导入 GPG key

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys EEA14886

出现以下的错误提示

Executing: /tmp/apt-key-gpghome.qe1vuiYKev/gpg.1.sh --keyserver keyserver.ubuntu.com --recv-keys EEA14886
gpg: failed to start the dirmngr '/usr/bin/dirmngr': No such file or directory
gpg: connecting dirmngr at '/tmp/apt-key-gpghome.qe1vuiYKev/S.dirmngr' failed: No such file or directory
gpg: keyserver receive failed: No dirmngr

提示没有dirmngr，安装dirmngr

sudo apt-get install software-properties-common dirmngr

重新导入 GPG key

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys EEA14886

二、安装 Java 8

• 更新APT缓存并安装Java8

sudo apt-get update
sudo apt-get install oracle-java8-installer

• 查看java版本，以及java, javac命令是否可用

java -version
java
javac

三、配置 JAVA 环境

• 将oracle-java8设置为默认的java环境

sudo apt-get install oracle-java8-set-default
sudo update-java-alternatives -s java-8-oracle
echo $JAVA_HOME

https://blog.csdn.net/orgcheng/article/details/26063313
https://blog.csdn.net/huangxiongbiao/article/details/50814915
https://www.cnblogs.com/zrazu/p/7106352.html