Ubantu 16.04 用apt-get自動安裝oracle java

每次安裝都要查一遍，索性記錄一下。

首先執行：

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

對於需要的java版本，繼續執行：

• Oracle JDK 6: sudo apt-get install oracle-java6-installer
• Oracle JDK 7: sudo apt-get install oracle-java7-installer
• Oracle JDK 8: sudo apt-get install oracle-java8-installer

預設最新版

reference：https://www.digitalocean.com/community/tutorials/how-to-install-java-on-ubuntu-with-apt-get

關於ubantu換源：

1. cd /etc/apt 檢視是否有sources.list檔案
2. sudp cp sources.list sources.list1 備份原來的原始檔

3. sudo nano sources.list 編輯原始檔刪除原來的內容並填入(國內163的源)：

   deb http://mirrors.163.com/ubuntu/ trusty main restricted universe multiverse
   deb http://mirrors.163.com/ubuntu/ trusty-security main restricted universe multiverse
   deb http://mirrors.163.com/ubuntu/ trusty-updates main restricted universe multiverse
   deb http://mirrors.163.com/ubuntu/ trusty-proposed main restricted universe multiverse
   deb http://mirrors.163.com/ubuntu/ trusty-backports main restricted universe multiverse
   deb-src http://mirrors.163.com/ubuntu/ trusty main restricted universe multiverse
   deb-src http://mirrors.163.com/ubuntu/ trusty-security main restricted universe multiverse
   deb-src http://mirrors.163.com/ubuntu/ trusty-updates main restricted universe multiverse
   deb-src http://mirrors.163.com/ubuntu/ trusty-proposed main restricted universe multiverse
   deb-src http://mirrors.163.com/ubuntu/ trusty-backports main restricted universe multiverse

4. 儲存退出，執行sudo apt-get update檢查換源是否成功

reference: http://jingyan.baidu.com/article/925f8cb8f3af25c0dde05681.html