Difference between pages "Installing Java" and "Package:ACPI Daemon"

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(Options for JRE and JDK)
 
 
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== What is Java? What purpose does it serve? ==
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== Introduction ==
 +
==== What is acpi? ====
 +
"In computing, the Advanced Configuration and Power Interface (ACPI) specification provides an open standard for device configuration and power management by the operating system." [(http://en.wikipedia.org/wiki/Advanced_Configuration_and_Power_Interface Wikipedia)]
  
"Java is a programming language and computing platform first released by Sun Microsystems in 1995. There are lots of applications and websites that will not work unless you have Java installed, and more are created every day. Java is fast, secure, and reliable. From laptops to datacenters, game consoles to scientific supercomputers, cell phones to the Internet, Java is everywhere!" ([http://www.java.com/en/download/faq/whatis_java.xml Oracle page on Java])
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==== What is acpid? ====
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"ACPID is a completely flexible, totally extensible daemon for delivering ACPI events. It listens on a file (/proc/acpi/event) and when an event occurs, executes programs to handle the event. The programs it executes are configured through a set of configuration files, which can be dropped into place by packages or by the admin." [(http://acpid.sourceforge.net/ acpid Sourceforge)]
  
=== JRE vs. JDK ===
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== Installing acpid ==
* '''JRE''': Just the Java Virtual Machine.
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==== Emerging ====
* '''JDK''': The Java Software Development Kit - this includes command line tools for launching <code>.jar</code> files, the JRE, compilers, and tools for creating Java-based programs.
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To install acpid, run this command:
 
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== Installing java ==
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=== Options for JRE and JDK ===
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On Funtoo, there are several different java packages that you can emerge:
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* '''{{Package|virtual/jre}}''' - When you emerge this, it pulls in the java runtime environment for your current profile.
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* '''{{Package|virtual/jdk}}''' - When you emerge this, it pulls in the java development kit for your current profile.
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* '''{{Package|dev-java/icedtea}}''' - A Gentoo-made binary of the IcedTea JDK, this is the JDK pulled in when you emerge <code>virtual/jdk</code> on the desktop profile.
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* '''{{Package|dev-java/oracle-jdk-bin}}''' - Oracle's version of the Java Development Kit. This package and <code>dev-java/oracle-jre-bin</code> both require you to manually download the file and place it in <code>/usr/portage/distfiles</code> due to the fact that Oracle wants you to accept a license before downloading the package.
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* '''{{Package|dev-java/oracle-jre-bin}}''' - Similar to the above, this only includes the Java Runtime Environment.
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Oracle's version of JAVA is default in Funtoo .
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=== Emerging java -- {{Package|virtual/jdk}} method ===
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To install java, run the following command:
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<console>
 
<console>
###i## emerge virtual/jdk
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##r### ##b##emerge -av acpid
 
</console>
 
</console>
  
== Testing to see if it emerged ==
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==== Adding to rc ====
To check that java installed on your system, run the following command:
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<console>
 
<console>
$##i## java -version
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##r### ##b##rc-update add acpid default
 
</console>
 
</console>
If you get something like this, you are ready to use java!:
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Then, run the following to start rc:
 
<console>
 
<console>
java version "1.7.0_21"OpenJDK Runtime Environment (IcedTea 2.3.9) (Gentoo build 1.7.0_21-b02)OpenJDK 64-Bit Server VM (build 23.7-b01, mixed mode)
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##r### ##b##rc
 
</console>
 
</console>
 
To be double sure that the java package you emerged is functional, you can run the following:
 
<console>
 
$##i## java-config --list-available-vms
 
The following VMs are available for generation-2:
 
*)      IcedTea JDK 7.2.3.9 [icedtea-bin-7]
 
</console>
 
 
== Using the java command ==
 
==== Overview of the command ====
 
The java command can be run like so:
 
* '''java [options] class [argument ...]'''
 
* '''java [options] -jar file.jar [argument ...]'''
 
 
==== Example command usage ====
 
Compiling code:
 
<console>
 
$##i## javac -d bin -sourcepath src -cp lib/lib1.jar;lib/lib2.jar src/com/example/Application.java
 
</console>
 
 
Running code:
 
<console>
 
$##i## java -cp bin;lib/lib1.jar;lib/lib2.jar com.example.Application
 
</console>
 
 
Running a jarfile:
 
<console>
 
$##i## java -jar Application.jar
 
</console>
 
 
== More Information ==
 
* [http://docs.oracle.com/javase/ Java SE at Oracle.com]
 
* [http://en.wikipedia.org/wiki/Java_(programming_language) Wikipedia article]
 
* [http://docs.oracle.com/javase/tutorial/ Very informative tutorials]
 
 
== Sources ==
 
([http://www.sergiy.ca/how-to-compile-and-launch-java-code-from-command-line/ Information provided for example command usage])
 
 
 
[[Category:System]]
 
[[Category:System]]

Revision as of 01:24, 11 November 2013

Introduction

What is acpi?

"In computing, the Advanced Configuration and Power Interface (ACPI) specification provides an open standard for device configuration and power management by the operating system." [(http://en.wikipedia.org/wiki/Advanced_Configuration_and_Power_Interface Wikipedia)]

What is acpid?

"ACPID is a completely flexible, totally extensible daemon for delivering ACPI events. It listens on a file (/proc/acpi/event) and when an event occurs, executes programs to handle the event. The programs it executes are configured through a set of configuration files, which can be dropped into place by packages or by the admin." [(http://acpid.sourceforge.net/ acpid Sourceforge)]

Installing acpid

Emerging

To install acpid, run this command:

# emerge -av acpid

Adding to rc

# rc-update add acpid default

Then, run the following to start rc:

# rc