apt-get install JDK8

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Quick Start

安装python-software-properties

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sudo apt-get install python-software-properties
sudo apt-get install software-properties-common

首先添加ppa

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sudo add-apt-repository ppa:webupd8team/java

然后更新系统

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sudo apt-get update

最后开始安装

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sudo apt-get install oracle-java8-installer
java -version
java version “1.8.0_05"
Java(TM) SE Runtime Environment (build 1.8.0_05-b13) 
Java HotSpot(TM) Server VM (build 25.5-b02, mixed mode)

java版本切换

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sudo update-java-alternatives -s java-8-oracle