ubuntu 安装jdk
1.添加ppa
sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
2.安装oracle-java-installer
jdk7
sudo apt-get install oracle-java7-installer
jdk8
sudo apt-get install oracle-java8-installer
sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
jdk7
sudo apt-get install oracle-java7-installer
jdk8
sudo apt-get install oracle-java8-installer