運維調試記錄：Ubuntu下通過PPA方式安裝Java 8并自動配置環境變量

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Install OpenJDK 8 in Ubuntu:

For 14.10 and later just run

apt-get install openjdk-8-jdk

Oracle JAVA 8 Stable release has been released on Mar,18 2014 and available to download and install on official download page. Oracle Java PPA for Ubuntu and LinuxMint is being maintained by Webupd8 Team. JAVA 8 is released with many of new features and security updates, read more about whats new in Oracle Java 8.

Installing Java 8 on Ubuntu

First you need to add webupd8team Java PPA repository in your system and install Oracle Java 8 using following set of commands.

$ sudo add-apt-repository ppa:webupd8team/java
$ sudo apt-get update
$ sudo apt-get install oracle-java8-installer           

Verify Installed Java Version

After successfully installing oracle Java using above step verify installed version using following command.

zjl@zjl-uestc:~$ java -version

java version "1.8.0_77"
Java(TM) SE Runtime Environment (build 1.8.0_77-b03)
Java HotSpot(TM) 64-Bit Server VM (build 25.77-b03, mixed mode)           

Configuring Java Environment

In Webupd8 ppa repository also providing a package to set environment variables, Install this package using following command.

$ sudo apt-get install oracle-java8-set-default           

System Java version switch

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

References:

https://launchpad.net/~webupd8team/+archive/java