问题: 我该如何在 Elemetary OS Luna 上安装Oracle Java 7？
回答: 在 Elementary OS Luna 安装 Java 7 的步骤如下: 由于Elementary OS是基于Ubuntu，所以我们允许使用具有多种Java包的WEPUD8 PPA。
$ sudo add-apt-repository ppa:webupd8team/java
You are about to add the following PPA to your system:
Oracle Java (JDK) Installer (automatically downloads and installs Oracle JDK6 / JDK7 / JDK8). There are no actual Java files in this PPA. More info: http://www.webupd8.org/2012/01/install-oracle-java-jdk-7-in-ubuntu-via.html
Debian installation instructions: http://www.webupd8.org/2012/06/how-to-install-oracle-java-7-in-debian.html
More info: https://launchpad.net/~webupd8team/+archive/java
Press [ENTER] to continue or ctrl-c to cancel adding it
gpg: keyring `/tmp/tmpB5WwDG/secring.gpg' created
gpg: keyring `/tmp/tmpB5WwDG/pubring.gpg' created
gpg: requesting key EEA14886 from hkp server keyserver.ubuntu.com
gpg: /tmp/tmpB5WwDG/trustdb.gpg: trustdb created
gpg: key EEA14886: public key "Launchpad VLC" imported
gpg: Total number processed: 1
gpg: imported: 1 (RSA: 1)
OK
$ sudo apt-get update
$ sudo apt-get install oracle-java7-installer
[sudo] password for enock:
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
gir1.2-gstreamer-0.10 libilmbase6 libmagickcore4 libmagickwand4 libcdt4
libmagickcore4-extra liblqr-1-0 imagemagick-common libpathplan4 libopenexr6
rsync netpbm libgvc5 libnetpbm10 libgraph4
Use 'apt-get autoremove' to remove them.
The following extra packages will be installed:
gsfonts-x11 java-common
Suggested packages:
default-jre equivs binfmt-support visualvm ttf-baekmuk ttf-unfonts
ttf-unfonts-core ttf-kochi-gothic ttf-sazanami-gothic ttf-kochi-mincho
ttf-sazanami-mincho ttf-arphic-uming
The following NEW packages will be installed:
gsfonts-x11 java-common oracle-java7-installer
0 upgraded, 3 newly installed, 0 to remove and 196 not upgraded.
Need to get 88.5 kB of archives.
After this operation, 473 kB of additional disk space will be used.
Do you want to continue [Y/n]?
8. 然后选择Yes继续。
9. 现在请等待安装包的下载与自动安装:
10. 安装完成。你可以在终端上查看Java版本:
$ java -version
java version "1.7.0_45"
Java(TM) SE Runtime Environment (build 1.7.0_45-b18)
Java HotSpot(TM) 64-Bit Server VM (build 24.45-b08, mixed mode)
via: http://www.unixmen.com/install-oracle-java-7-elementary-os-luna-via-ppa/
译者：whatever1992 校对：wxy
本文由 LCTT 原创翻译，Linux中国 荣誉推出
