참조: http://www.ubuntugeek.com/how-to-install-java-runtime-environment-jre-in-ubuntu.html

== Currently Ubuntu has the following Java packages

sun-java6-bin – Contains the binaries

sun-java6-demo – Contains demos and examples

sun-java6-doc – Contains the documentation

sun-java6-fonts – Contains the Lucida TrueType fonts from the JRE

sun-java6-jdk – Contains the metapackage for the JDK

sun-java6-jre – Contains the metapackage for the JRE

sun-java6-plugin – Contains the plug-in for Mozilla-based browsers

sun-java6-source – Contains source files for the JDK
——–방법 1———–
[Ubuntu 11.04]
$ sudo add-apt-repository “deb http://archive.canonical.com/ natty partner”

$ sudo apt-get update

=== Install JRE
$ sudo apt-get install sun-java6-jre sun-java6-plugin

=== Install JDK
$ sudo apt-get install sun-java6-jdk

——-방법 2———-
== Install JRE on ubuntu 11.04 (Natty) using PPA : http://www.ubuntugeek.com/install-jre-in-ubuntu-11-04-natty-using-ppa.html
참조:

Open the terminal and run the following commands

$ sudo add-apt-repository ppa:ferramroberto/java
$ sudo apt-get update
$ sudo apt-get install sun-java6-jre sun-java6-plugin sun-java6-fonts

=== Testing Java Runtime Environment
$ java -version

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