Ubuntu安装jdk源码

1. 通过ppa（源）方式安装
2. 通过官网下载安装包安装

ppa源安装

1. 添加ppa

   for  before 14.04 :
       sudo apt-get install python-software-properties
   for after 14.04 :
       apt-get install software-properties-common
   sudo add-apt-repository ppa:webupd8team/java
   sudo apt-get update 
   

2. 安装oracle-java-installer

       sudo apt-get install oracle-java8-installer