Guía Ubuntu - Contribuciones del usuario [es]

Java

2009-09-21T22:58:25Z

Jccaleta:

Java

2009-09-21T22:57:16Z

Jccaleta:

{{software
| nombre = Java
| desarrollador = Sun Microsystems
| logo = [[Imagen:Logo java.gif|center]]
| version_estable = 6
| fecha_version_estable = {{w|11 de diciembre}} de {{w|2006}}
| version_inestable = 7
| fecha_version_inestable = {{w|2006}}
| paquete = sun-java6-*
| genero = [[:Categoría:Lenguajes|Lenguajes de programación]]
| licencia = {{w|software libre|libre}} ({{w|CDDL}})
| web = [http://www.java.com/es/ www.java.com/es]
}}

'''Java''' es un {{w|lenguaje de programación}} {{w|programación orientada a objetos|orientado a objetos}}. Las aplicaciones Java se ejecutan en una máquina virtual, por lo tanto son {{w|multiplataforma}}, lo que implica cierto procesamiento inicial, haciendo algunos programas más lentos que las aplicaciones programadas en otros {{w|lenguaje de programación|lenguajes}} nativos. Aunque en las últimas versiones esta diferencia se hace menos patente.

Por defecto, en Ubuntu nos encontramos con una versión libre del '''JRE''' ('''''J'''ava '''R'''untime '''E'''nvironment'', ''Entorno de Ejecución de Java'') de Java, pero lamentablemente es una versión antigua, la 1.4.2. Actualmente Java ya es de código abierto, y se encuentra en la versión 6 (en la antigua nomenclatura es la versión 1.6.0).

== Instalación ==

=== Desde los repositorios de Ubuntu ===

Otra forma sencilla de instalar el '''JRE6''' o el '''JDK6''', es usar los repositorios oficiales de Ubuntu.
Para ello, simplemente debemos [[añadir aplicaciones|instalar]] desde los repositorios los paquetes '''sun-java6-bin''', '''sun-java6-jre''' y '''sun-java6-jdk''', respectivamente.

=== Desde la web de Java ===

Si tienes dificultades con el anterior caso, puedes descargarte del [http://java.sun.com/javase/downloads/index.jsp sitio web de Sun] el '''JRE6''' o, en caso de que desees programar, el '''JDK6'''. Una vez descargado, tenemos que cambiarle los permisos al fichero para que se pueda ejecutar e instalarlo.
Seguimos los siguientes pasos:

En una [[terminal]], nos vamos a la carpeta donde hemos descargado el fichero '''.bin''':
$ cd <carpeta>

Le damos permisos de ejecución al archivo (cambiar '''jre''' por '''jdk''' si es el caso) y lo ejecutamos para instalarlo :

$ chmod +x jre-6-linux-i586.bin
$ sudo ./jre-6-linux-i586.bin

Seguimos las instrucciones que van apareciendo en pantalla, que son 2 o 3.

Movemos la carpeta creada después de la instalación (llamada jre1.6.0) a una más apropiada:
$ sudo mv jre1.6.0 /usr/lib/jvm

Seteamos el nuevo Java como una de las "alternativas de java":
$ sudo update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/jre1.6.0/bin/java" 1

Ahora seteamos la "nueva alternativa" como la real de Java. Este paso hace que la version de sun sea la usada por defecto :
$ sudo update-alternatives --set java /usr/lib/jvm/jre1.6.0/bin/java

Para comprobar si tenemos la versión 1.6.0, tipeamos en la [[terminal]]:

$ java -version
java version "1.6.0"
Java(TM) SE Runtime Environment (build 1.6.0-b105)
Java HotSpot(TM) Client VM (build 1.6.0-b105, mixed mode)

== Configurar el path de JAVAC (para las versiones JDK) ==

Posiblemente te hayas dado cuenta que al intentar compilar un archivo Java con algún programa (por ejemplo, [http://www.jgrasp.org/ jGRASP]), aparece un error que dice: ''javac no fue encontrado''. Los requisitos para poder configurar el path de javac es haber instalado algún '''JDK''', en este ejemplo se usa el '''JDK6'''.
{{Nota|Las instrucciones de instalación de JDK 6 se encuentran en la sección [[#JDK 6|Instalación -> Desde la web de Java -> JDK 6]] de este artículo.}}
Pues bien, primero abrimos una [[terminal]]. Luego, tendremos que hacer esto (las rutas mostradas corresponden al '''JDK6''' instalado como se muestra en esta guía):

1. Setear javac de '''JDK''' como una "alternativa" (todo en la misma linea), ya que el sistema no lo reconoce:
$ sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/lib/jvm/jdk1.6.0_XX/bin/javac" 1 (XX la vesion del JDK que se descargo)

2. Ahora seteamos la "nueva alternativa" como la real de javac en el sistema:
$ sudo update-alternatives --set javac /usr/lib/jvm/jdk1.6.0_XX/bin/javac

3. Para comprobar si tenemos la versión de javac 1.6.0_06, tipeamos en la [[terminal]]:
$ javac -version

Después de esta instrucción, tendrá que aparecer algo así:
javac 1.6.0_06

Ya tienes javac configurado y listo para usar. Ahora podrás compilar sin ningún problema.

== Instalación del plugin para Firefox ==

=== Desde los repositorios oficiales de Ubuntu ===

Si queremos disponer del plugin que nos permite utilizar applets Java dentro del navegador [[Firefox]], la manera más sencilla es [[añadir aplicaciones|instalar]] el paquete '''sun-java6-plugin''' de los repositorios oficiales de Ubuntu.

== Posibles problemas ==

=== No se ve la interfaz gráfica de aplicaciones hechas en Java si está funcionando [[Compiz Fusion]] ===

Escribe en un terminal:
$ sudo gedit /etc/environment

y agrega la siguiente línea:
AWT_TOOLKIT="MToolkit"

guarda el archivo, [[reiniciar servidor X|reinicia el entorno gráfico]] y listo.

== Ver también ==

* [[Firefox#Soporte Java|Firefox: Soporte Java]]
* [[Eclipse]]
* [[NetBeans]]
* [[BeanShell]]

== Enlaces externos ==

{{Wikipedia|Lenguaje de programación Java}}
* [http://www.java.com/es/ Sitio web oficial de Java] {{es}}
* [http://www.java.com/es/download/ Página de descargas oficial de Java] {{es}}
* [http://www.ubuntu-linux.com.ar/instalar_sun_java_ubuntu_feisty Instalar .deb Java 1.6 en Ubuntu 7.04 Feisty, y su plugin para Firefox] {{es}}
* [http://wiki.serios.net/wiki/Debian_Java_JRE/JDK_installation_with_java-package Debian Java JRE/JDK installation with java-package] {{en}}

==update-java-alternatives ia32-java-6-sun==
You are correct. The file does exist. What does not exist is a debian packager "alternative" definition for that contains that file. You have to install the alternative first.

The problem with the "update-java-alternatives" script is that it only changes which alternative is set. It does not actually add any files to the alternative definitions.

To set a definition for an alternative, you have to run update-alternatives with the --install option. I manually installed the jdk (with the jre) from sun's site to /usr/lib/jvm/ia32-java-6-sun, and then created my own script to install the alternatives before updating them.

update-java-alternatives reads the .jinfo file for the selected set of alternatives in /usr/lib/jvm, which contains 3 of the four needed arguments for an alternative (priority, name, and path), but does not contain the name of the link created by the alternative, so it cannot create it if it does not exist, and has not been programmed to install a new alternative, but only to select from existing ones.

This script created all the alternatives for me. Set the priority high if you want ia32-java-6-sun to get automatic preference. Set it low if you do not. 1075 was higher than anything on my system. This script created all the alternatives for me. Note that I used the ns7-gcc29 versions of libjavaplugin_oji.so, and that I coded the location of the links to the /usr/lib/<browsername>/plugins directory. This may or not be correct (verify for yourself). Note also that I modeled the structure after the real ubuntu ia32-java-6-sun package structure for consistency, including replicating their structure for sybolic links, and gziping all the man files. This script could have been shorter, but I threw it together pretty quicly using sed and a copy of the .ia32-java-6-sun.jinfo file.

Here is my script (ia32-java-6-sun.sh):

#!/bin/sh
export JAVA_PACKAGE_NAME=ia32-java-6-sun-1.6.0.06
export JAVA_PACKAGE_ALIAS=ia32-java-6-sun
export JAVA_PACKAGE_PRIORITY=1075
export JAVA_PACKAGE_SECTION=non-free
#
update-alternatives --install /usr/bin/ControlPanel ControlPanel /usr/lib/jvm/ia32-java-6-sun/jre/bin/ControlPanel $JAVA_PACKAGE_PRIORITY
update-alternatives --auto ControlPanel
update-alternatives --install /usr/bin/java java /usr/lib/jvm/ia32-java-6-sun/jre/bin/java $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/java.1.gz java.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/java.1.gz
update-alternatives --auto java
update-alternatives --install /usr/bin/java_vm java_vm /usr/lib/jvm/ia32-java-6-sun/jre/bin/java_vm $JAVA_PACKAGE_PRIORITY
update-alternatives --auto java_vm
update-alternatives --install /usr/bin/javaws javaws /usr/lib/jvm/ia32-java-6-sun/jre/bin/javaws $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/javaws.1.gz javaws.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/javaws.1.gz
update-alternatives --auto javaws
update-alternatives --install /usr/bin/jcontrol jcontrol /usr/lib/jvm/ia32-java-6-sun/jre/bin/jcontrol $JAVA_PACKAGE_PRIORITY
update-alternatives --auto jcontrol
update-alternatives --install /usr/bin/keytool keytool /usr/lib/jvm/ia32-java-6-sun/jre/bin/keytool $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/keytool.1.gz keytool.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/keytool.1.gz
update-alternatives --auto keytool
update-alternatives --install /usr/bin/pack200 pack200 /usr/lib/jvm/ia32-java-6-sun/jre/bin/pack200 $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/pack200.1.gz pack200.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/pack200.1.gz
update-alternatives --auto pack200
update-alternatives --install /usr/bin/policytool policytool /usr/lib/jvm/ia32-java-6-sun/jre/bin/policytool $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/policytool.1.gz policytool.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/policytool.1.gz
update-alternatives --auto policytool
update-alternatives --install /usr/bin/rmid rmid /usr/lib/jvm/ia32-java-6-sun/jre/bin/rmid $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/rmid.1.gz rmid.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/rmid.1.gz
update-alternatives --auto rmid
update-alternatives --install /usr/bin/rmiregistry rmiregistry /usr/lib/jvm/ia32-java-6-sun/jre/bin/rmiregistry $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/rmiregistry.1.gz rmiregistry.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/rmiregistry.1.gz
update-alternatives --auto rmiregistry
update-alternatives --install /usr/bin/unpack200 unpack200 /usr/lib/jvm/ia32-java-6-sun/jre/bin/unpack200 $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/unpack200.1.gz unpack200.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/unpack200.1.gz
update-alternatives --auto unpack200
update-alternatives --install /usr/bin/orbd orbd /usr/lib/jvm/ia32-java-6-sun/jre/bin/orbd $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/orbd.1.gz orbd.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/orbd.1.gz
update-alternatives --auto orbd
update-alternatives --install /usr/bin/servertool servertool /usr/lib/jvm/ia32-java-6-sun/jre/bin/servertool $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/servertool.1.gz servertool.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/servertool.1.gz
update-alternatives --auto servertool
update-alternatives --install /usr/bin/tnameserv tnameserv /usr/lib/jvm/ia32-java-6-sun/jre/bin/tnameserv $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/tnameserv.1.gz tnameserv.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/tnameserv.1.gz
update-alternatives --auto tnameserv
update-alternatives --install /usr/bin/HtmlConverter HtmlConverter /usr/lib/jvm/ia32-java-6-sun/bin/HtmlConverter $JAVA_PACKAGE_PRIORITY
update-alternatives --auto HtmlConverter
update-alternatives --install /usr/bin/appletviewer appletviewer /usr/lib/jvm/ia32-java-6-sun/bin/appletviewer $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/appletviewer.1.gz appletviewer.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/appletviewer.1.gz
update-alternatives --auto appletviewer
update-alternatives --install /usr/bin/apt apt /usr/lib/jvm/ia32-java-6-sun/bin/apt $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/apt.1.gz apt.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/apt.1.gz
update-alternatives --auto apt
update-alternatives --install /usr/bin/extcheck extcheck /usr/lib/jvm/ia32-java-6-sun/bin/extcheck $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/extcheck.1.gz extcheck.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/extcheck.1.gz
update-alternatives --auto extcheck
update-alternatives --install /usr/bin/idlj idlj /usr/lib/jvm/ia32-java-6-sun/bin/idlj $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/idlj.1.gz idlj.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/idlj.1.gz
update-alternatives --auto idlj
update-alternatives --install /usr/bin/jar jar /usr/lib/jvm/ia32-java-6-sun/bin/jar $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/jar.1.gz jar.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/jar.1.gz
update-alternatives --auto jar
update-alternatives --install /usr/bin/jarsigner jarsigner /usr/lib/jvm/ia32-java-6-sun/bin/jarsigner $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/jarsigner.1.gz jarsigner.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/jarsigner.1.gz
update-alternatives --auto jarsigner
update-alternatives --install /usr/bin/java-rmi.cgi java-rmi.cgi /usr/lib/jvm/ia32-java-6-sun/bin/java-rmi.cgi $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/java-rmi.cgi.1.gz java-rmi.cgi.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/java-rmi.cgi.1.gz
update-alternatives --auto java-rmi.cgi
update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/ia32-java-6-sun/bin/javac $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/javac.1.gz javac.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/javac.1.gz
update-alternatives --auto javac
update-alternatives --install /usr/bin/javadoc javadoc /usr/lib/jvm/ia32-java-6-sun/bin/javadoc $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/javadoc.1.gz javadoc.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/javadoc.1.gz
update-alternatives --auto javadoc
update-alternatives --install /usr/bin/javah javah /usr/lib/jvm/ia32-java-6-sun/bin/javah $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/javah.1.gz javah.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/javah.1.gz
update-alternatives --auto javah
update-alternatives --install /usr/bin/javap javap /usr/lib/jvm/ia32-java-6-sun/bin/javap $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/javap.1.gz javap.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/javap.1.gz
update-alternatives --auto javap
update-alternatives --install /usr/bin/jconsole jconsole /usr/lib/jvm/ia32-java-6-sun/bin/jconsole $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/jconsole.1.gz jconsole.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/jconsole.1.gz
update-alternatives --auto jconsole
update-alternatives --install /usr/bin/jdb jdb /usr/lib/jvm/ia32-java-6-sun/bin/jdb $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/jdb.1.gz jdb.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/jdb.1.gz
update-alternatives --auto jdb
update-alternatives --install /usr/bin/jhat jhat /usr/lib/jvm/ia32-java-6-sun/bin/jhat $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/jhat.1.gz jhat.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/jhat.1.gz
update-alternatives --auto jhat
update-alternatives --install /usr/bin/jinfo jinfo /usr/lib/jvm/ia32-java-6-sun/bin/jinfo $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/jinfo.1.gz jinfo.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/jinfo.1.gz
update-alternatives --auto jinfo
update-alternatives --install /usr/bin/jmap jmap /usr/lib/jvm/ia32-java-6-sun/bin/jmap $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/jmap.1.gz jmap.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/jmap.1.gz
update-alternatives --auto jmap
update-alternatives --install /usr/bin/jps jps /usr/lib/jvm/ia32-java-6-sun/bin/jps $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/jps.1.gz jps.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/jps.1.gz
update-alternatives --auto jps
update-alternatives --install /usr/bin/jrunscript jrunscript /usr/lib/jvm/ia32-java-6-sun/bin/jrunscript $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/jrunscript.1.gz jrunscript.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/jrunscript.1.gz
update-alternatives --auto jrunscript
update-alternatives --install /usr/bin/jsadebugd jsadebugd /usr/lib/jvm/ia32-java-6-sun/bin/jsadebugd $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/jsadebugd.1.gz jsadebugd.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/jsadebugd.1.gz
update-alternatives --auto jsadebugd
update-alternatives --install /usr/bin/jstack jstack /usr/lib/jvm/ia32-java-6-sun/bin/jstack $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/jstack.1.gz jstack.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/jstack.1.gz
update-alternatives --auto jstack
update-alternatives --install /usr/bin/jstat jstat /usr/lib/jvm/ia32-java-6-sun/bin/jstat $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/jstat.1.gz jstat.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/jstat.1.gz
update-alternatives --auto jstat
update-alternatives --install /usr/bin/jstatd jstatd /usr/lib/jvm/ia32-java-6-sun/bin/jstatd $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/jstatd.1.gz jstatd.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/jstatd.1.gz
update-alternatives --auto jstatd
update-alternatives --install /usr/bin/native2ascii native2ascii /usr/lib/jvm/ia32-java-6-sun/bin/native2ascii $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/native2ascii.1.gz native2ascii.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/native2ascii.1.gz
update-alternatives --auto native2ascii
update-alternatives --install /usr/bin/rmic rmic /usr/lib/jvm/ia32-java-6-sun/bin/rmic $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/rmic.1.gz rmic.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/rmic.1.gz
update-alternatives --auto rmic
update-alternatives --install /usr/bin/schemagen schemagen /usr/lib/jvm/ia32-java-6-sun/bin/schemagen $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/schemagen.1.gz schemagen.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/schemagen.1.gz
update-alternatives --auto schemagen
update-alternatives --install /usr/bin/serialver serialver /usr/lib/jvm/ia32-java-6-sun/bin/serialver $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/serialver.1.gz serialver.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/serialver.1.gz
update-alternatives --auto serialver
update-alternatives --install /usr/bin/wsgen wsgen /usr/lib/jvm/ia32-java-6-sun/bin/wsgen $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/wsgen.1.gz wsgen.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/wsgen.1.gz
update-alternatives --auto wsgen
update-alternatives --install /usr/bin/wsimport wsimport /usr/lib/jvm/ia32-java-6-sun/bin/wsimport $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/wsimport.1.gz wsimport.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/wsimport.1.gz
update-alternatives --auto wsimport
update-alternatives --install /usr/bin/xjc xjc /usr/lib/jvm/ia32-java-6-sun/bin/xjc $JAVA_PACKAGE_PRIORITY --slave /usr/share/man/man1/xjc.1.gz xjc.1.gz /usr/lib/jvm/ia32-java-6-sun/man/man1/xjc.1.gz
update-alternatives --auto xjc
update-alternatives --install /usr/lib/xulrunner-addons/plugins/javaplugin_oji.so xulrunner-addons-javaplugin.so /usr/lib/jvm/ia32-java-6-sun/jre/plugin/i386/ns7-gcc29/libjavaplugin_oji.so $JAVA_PACKAGE_PRIORITY
update-alternatives --auto xulrunner-addons-javaplugin.so
update-alternatives --install /usr/lib/firefox/plugins/javaplugin_oji.so firefox-javaplugin.so /usr/lib/jvm/ia32-java-6-sun/jre/plugin/i386/ns7-gcc29/libjavaplugin_oji.so $JAVA_PACKAGE_PRIORITY
update-alternatives --auto firefox-javaplugin.so
update-alternatives --install /usr/lib/iceape/plugins/javaplugin_oji.so iceape-javaplugin.so /usr/lib/jvm/ia32-java-6-sun/jre/plugin/i386/ns7-gcc29/libjavaplugin_oji.so $JAVA_PACKAGE_PRIORITY
update-alternatives --auto iceape-javaplugin.so
update-alternatives --install /usr/lib/iceweasel/plugins/javaplugin_oji.so iceweasel-javaplugin.so /usr/lib/jvm/ia32-java-6-sun/jre/plugin/i386/ns7-gcc29/libjavaplugin_oji.so $JAVA_PACKAGE_PRIORITY
update-alternatives --auto iceweasel-javaplugin.so
update-alternatives --install /usr/lib/mozilla/plugins/javaplugin_oji.so mozilla-javaplugin.so /usr/lib/jvm/ia32-java-6-sun/jre/plugin/i386/ns7-gcc29/libjavaplugin_oji.so $JAVA_PACKAGE_PRIORITY
update-alternatives --auto mozilla-javaplugin.so
update-alternatives --install /usr/lib/midbrowser/plugins/javaplugin_oji.so midbrowser-javaplugin.so /usr/lib/jvm/ia32-java-6-sun/jre/plugin/i386/ns7-gcc29/libjavaplugin_oji.so $JAVA_PACKAGE_PRIORITY
update-alternatives --auto midbrowser-javaplugin.so
update-alternatives --install /usr/lib/xulrunner/plugins/javaplugin_oji.so xulrunner-javaplugin.so /usr/lib/jvm/ia32-java-6-sun/jre/plugin/i386/ns7-gcc29/libjavaplugin_oji.so $JAVA_PACKAGE_PRIORITY
update-alternatives --auto xulrunner-javaplugin.so
update-alternatives --install /usr/lib/firefox-3.0/plugins/javaplugin_oji.so firefox-3.0-javaplugin.so /usr/lib/jvm/ia32-java-6-sun/jre/plugin/i386/ns7-gcc29/libjavaplugin_oji.so $JAVA_PACKAGE_PRIORITY
update-alternatives --auto firefox-3.0-javaplugin.so
#

To make this consistent with my /usr/lib/jvm/.ia32-java-6-sun.jinfo file, I changed it as well: