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Revision 1.50 - (hide annotations) (download) (as text)
Mon May 9 19:16:31 2011 UTC (3 years, 4 months ago) by nightmorph
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File MIME type: application/xml
update java jdk/jre list, make icedtea a bit more prominent, address ACCEPT_LICENSE, misc fixes. bug 366261 and bug 366257.

1 neysx 1.11 <?xml version="1.0" encoding="UTF-8"?>
2 swift 1.8 <!DOCTYPE guide SYSTEM "/dtd/guide.dtd">
3 nightmorph 1.50 <!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/java.xml,v 1.49 2010/07/06 11:51:28 jkt Exp $ -->
4 zhen 1.4
5 nightmorph 1.47 <guide>
6 neysx 1.11 <title>Gentoo Java Guide</title>
7    
8 nightmorph 1.23 <author title="Author">
9 rane 1.28 <mail link="nichoj@gentoo.org">Joshua Nichols</mail>
10 neysx 1.11 </author>
11 nightmorph 1.23 <author title="Author">
12 rane 1.28 <mail link="karltk@gentoo.org">Karl Trygve Kalleberg</mail>
13 neysx 1.11 </author>
14 swift 1.13 <author title="Editor">
15 nightmorph 1.23 <mail link="nightmorph@gentoo.org">Joshua Saddler</mail>
16 swift 1.13 </author>
17 neysx 1.11
18     <abstract>
19 nightmorph 1.23 This guide will introduce you to Java and explain how to use Java with Gentoo
20     Linux.
21 neysx 1.11 </abstract>
22    
23 nightmorph 1.23 <!-- The content of this document is licensed under the CC-BY-SA license -->
24     <!-- See http://creativecommons.org/licenses/by-sa/2.5 -->
25 neysx 1.11 <license/>
26    
27 nightmorph 1.50 <version>1</version>
28     <date>2011-05-09</date>
29 neysx 1.11
30     <chapter>
31 swift 1.13 <title>What is Java?</title>
32 neysx 1.11 <section>
33     <title>Overview</title>
34     <body>
35    
36     <p>
37 nightmorph 1.23 Java is a programming language developed by engineers of Sun Microsystems. The
38     language is object-oriented and designed to run on multiple platforms without
39     the need of recompiling code for each platform. Although Java can be compiled
40     as a native program, much of Java's popularity can be attributed to its
41     portability, along with other features such as garbage collection. To make
42     platform independence possible the Java compiler compiles the Java code to an
43     intermediate representation called "Java bytecode" that runs on a JRE (Java
44     Runtime Environment) and not directly on the operating system.
45 swift 1.13 </p>
46    
47     <p>
48 nightmorph 1.23 In order to run Java bytecode, one needs to have a JRE (Java Runtime
49     Environment) installed. A JRE provides core libraries, a platform dependent
50 nightmorph 1.39 Java Virtual Machine, plugins for browsers, among other things. A JDK (Java
51 nightmorph 1.23 Development Kit) adds programming tools, such as a bytecode compiler and a
52     debugger.
53 swift 1.13 </p>
54    
55     </body>
56     </section>
57     </chapter>
58    
59     <chapter>
60 nightmorph 1.35 <title>Before You Begin</title>
61 rane 1.28 <section>
62     <title>Existing installs</title>
63     <body>
64    
65     <p>
66     For existing installs, regardless of if you have installed anything Java
67     before, make sure you have followed the <uri
68     link="/proj/en/java/java-upgrade.xml">Java Upgrade Guide</uri>.
69     </p>
70    
71     </body>
72     </section>
73     <section>
74     <title>New installs</title>
75     <body>
76    
77     <p>
78     New installs should require no further preparation.
79     </p>
80    
81     </body>
82     </section>
83     </chapter>
84    
85     <chapter>
86     <title>Installing a Virtual Machine</title>
87 swift 1.13 <section>
88     <title>The choices</title>
89     <body>
90    
91     <p>
92 rane 1.28 Gentoo provides numerous Runtime Environments (JREs) and Development Kits
93     (JDKs). Among the current choices, we have:
94 swift 1.13 </p>
95    
96 nightmorph 1.23 <table>
97     <tr>
98     <th>Vendor</th>
99     <th>JDK</th>
100     <th>JRE</th>
101     </tr>
102     <tr>
103     <ti>Sun's Java Kit</ti>
104     <ti>dev-java/sun-jdk</ti>
105     <ti>dev-java/sun-jre-bin</ti>
106     </tr>
107     <tr>
108     <ti>The IBM Java Kit</ti>
109     <ti>dev-java/ibm-jdk-bin</ti>
110     <ti>dev-java/ibm-jre-bin</ti>
111     </tr>
112     <tr>
113     <ti>BEA WebLogic's J2SE Development Kit</ti>
114     <ti>dev-java/jrockit-jdk-bin</ti>
115     </tr>
116 nightmorph 1.50 <tr>
117     <ti>The IcedTea Open Java Kit</ti>
118     <ti>dev-java/icedtea</ti>
119     <ti>dev-java/icedtea6-bin</ti>
120     </tr>
121 nightmorph 1.23 </table>
122    
123     <!--
124 swift 1.41 TODO: list free implementations?
125 rane 1.26 note about not drop-in replacements
126 swift 1.41 kaffe/sablevm/gcj/jamvm
127 nightmorph 1.23 -->
128     </body>
129     </section>
130     <section>
131     <title>Installing a JRE/JDKs</title>
132     <body>
133    
134 neysx 1.11 <p>
135 nightmorph 1.23 To install your profile's default JDK, you can run <c>emerge virtual/jdk</c>.
136     Or to install your profile's default JRE, you can <c>emerge virtual/jre</c>.
137 neysx 1.11 </p>
138    
139 rane 1.28 <p>
140 nightmorph 1.50 Some JDKs and JREs, including the Sun packages, require accepting an End User
141     License Agreement, or EULA. If its license (such as dlj-1.1) is not listed in
142     ACCEPT_LICENSE in <path>/etc/make.conf</path>, then you won't be able to install
143     the JDK/JRE. For more information on how to add acceptable licenses to
144     <path>make.conf</path>, please read the <uri
145     link="/doc/en/handbook/handbook-x86.xml?part=2&amp;chap=1#doc_chap4">Portage
146     Handbook</uri>.
147     </p>
148    
149     <p>
150     To avoid any restrictive license hassle, consider installing <c>icedtea6-bin</c>
151     or <c>icedtea</c>, which are more open Java implementations from the OpenJDK
152     project.
153 rane 1.28 </p>
154    
155 nightmorph 1.23 <note>
156     A JDK also includes a JRE, so if you install a JDK you shouldn't have to also
157     have to install a JRE.
158     </note>
159    
160 neysx 1.11 </body>
161     </section>
162     <section>
163 rane 1.28 <title>Installing fetch-restricted virtual machines</title>
164 neysx 1.11 <body>
165    
166     <p>
167 nightmorph 1.44 Some of the JDKs and JREs require you to jump through a few hoops before
168     installing. Simply emerge the packages as you normally would. The ebuilds will
169     then instruct you where to go and what to download.
170 neysx 1.11 </p>
171    
172     <p>
173     You should download the indicated file(s) into
174 nightmorph 1.23 <path>/usr/portage/distfiles</path>. Once there, you can rerun the emerge
175     command, at which point the JRE/JDK will be begin to install.
176 neysx 1.11 </p>
177    
178     </body>
179     </section>
180     </chapter>
181    
182     <chapter>
183 rane 1.28 <title>Configuring your virtual machine</title>
184 neysx 1.11 <section>
185     <title>Overview</title>
186     <body>
187    
188     <p>
189 nightmorph 1.23 Gentoo has the ability to have multiple JDKs and JREs installed without causing
190     conflicts.
191 neysx 1.11 </p>
192    
193     <p>
194 nightmorph 1.23 Using the <c>java-config</c> tool, you can set the system-wide default
195     (provided you have root access). Users can also use <c>java-config</c> to set
196     up their own personal default.
197 neysx 1.11 </p>
198    
199 nightmorph 1.23 <note>
200     You can also use <e>eselect</e> to change the system and user vm. See
201 nightmorph 1.24 <c>eselect java-vm help</c>.
202 nightmorph 1.23 </note>
203    
204 neysx 1.11 </body>
205     </section>
206     <section>
207 rane 1.28 <title>Setting a default virtual machine</title>
208 neysx 1.11 <body>
209    
210     <p>
211 nightmorph 1.23 Running the command <c>java-config --list-available-vms</c> will give you a
212     list of all JREs and JDKs installed on your system. Here is an example of
213     output:
214 neysx 1.11 </p>
215    
216     <pre caption="Listing available VMs">
217 neysx 1.12 # <i>java-config --list-available-vms</i>
218 nightmorph 1.34 The following VMs are available for generation-2:
219 nightmorph 1.47 1) IcedTea6-bin 1.4.1 [icedtea6-bin]
220     2) Sun JDK 1.5.0.20 [sun-jdk-1.5] <comment>(Build Only)</comment>
221 nightmorph 1.43 *) Sun JDK 1.6.0.16 [sun-jdk-1.6]
222 neysx 1.11 </pre>
223    
224 nightmorph 1.43 <note>
225     VMs marked as Build Only may contain security vulnerabilities and/or be EOL.
226     Gentoo recommends not setting these VMs as either your system or user VM.
227     Please see <uri link="java.xml#build-only">Build Only VM</uri> for more
228     information.
229     </note>
230    
231 neysx 1.11 <p>
232 nightmorph 1.23 The <e>*</e> indicates this is the current active vm (system-vm or user-vm when
233     set). The name in the brackets (<e>[]</e>) is the handle or ID for that
234     particular VM. You use the handle or the number to <c>java-config
235     --set-system-vm</c>. Here is an example of how to set the system VM.
236 neysx 1.11 </p>
237 zhen 1.4
238 neysx 1.11 <pre caption="Setting the System VM">
239 nightmorph 1.23 <comment>(By handle (preferred))</comment>
240 nightmorph 1.47 # <i>java-config --set-system-vm sun-jdk-1.6</i>
241     Now using sun-jdk-1.6 as your generation-2 system JVM
242 nightmorph 1.23 <comment>(By number)</comment>
243 nightmorph 1.47 # <i>java-config --set-system-vm 3</i>
244 nightmorph 1.43 Now using sun-jdk-1.6 as your generation-2 system JVM
245 neysx 1.11 </pre>
246 drobbins 1.1
247 nightmorph 1.23 <p>
248     As a regular user, you can use <c>java-config --set-user-vm</c>.
249     </p>
250    
251 neysx 1.11 <note>
252 nightmorph 1.23 You no longer have to <c>source</c> the profile for updates to the user/system
253     VM take place.
254 neysx 1.11 </note>
255    
256 nightmorph 1.23 </body>
257     </section>
258 nightmorph 1.43 <section id="build-only">
259     <title>Build Only VM</title>
260     <body>
261    
262     <p>
263     Some virtual machines are flagged as build-only due to being EOL and/or
264     containing security vulnerabilities. These virtual machines will not
265     automatically be used by Gentoo for the running of applications using Gentoo
266     launchers but will still be available for use by Gentoo's build environment as
267     some packages may require them for building. The setting of these virtual
268     machines as either your system or user VM is strongly discouraged as these VMs
269     will then be used when running the <path>/usr/bin/{java,javac,..}</path>
270     executables and will also be used by any packages not using Gentoo's launcher
271     scripts.
272     </p>
273    
274     </body>
275     </section>
276 nightmorph 1.23 <section id="preferred-vm">
277 jkt 1.49 <title>Preferred Build VM</title>
278 nightmorph 1.23 <body>
279    
280     <p>
281 jkt 1.49 While merging Java packages, the VM used for building can sometimes be different
282     from the one currently set as the system VM.
283 nightmorph 1.23 </p>
284    
285     <p>
286 jkt 1.49 This merge time VM switching is needed when, for example, your system-vm is
287     set to a 1.6 VM and the package you are merging requires a 1.5 VM. While merging
288     it will select and use a 1.5 VM, leaving your system-vm choice intact.
289 nightmorph 1.23 </p>
290    
291 neysx 1.11 <p>
292 jkt 1.49 To define which VM is selected when a switch is needed, we have created a list of <e>default/supported
293     VMs</e> per arch. You can find them in
294     <path>/usr/share/java-config-2/config/jdk-defaults.conf</path>.
295 neysx 1.11 </p>
296 drobbins 1.1
297 nightmorph 1.23 <p>
298 nightmorph 1.50 You can override these defaults (and even your selected system VM) in
299 nightmorph 1.23 <path>/etc/java-config-2/build/jdk.conf</path> and have complete control over
300 jkt 1.49 which VM will get used for merging. Some examples:
301 nightmorph 1.23 </p>
302    
303     <pre caption="Example /etc/java-config-2/build/jdk.conf">
304     <comment>(I always want it to use a sun-jdk, ie sun-jdk-1.4 for 1.4, sun-jdk-1.5 for 1.5, etc)</comment>
305     *=sun-jdk
306 neysx 1.11 </pre>
307 drobbins 1.1
308 nightmorph 1.23 <pre caption="Example /etc/java-config-2/build/jdk.conf">
309     <comment>(Always use sun-jdk-1.5 wherever possible, except for when a 1.4 or 1.3 VM is explicitly required)</comment>
310     *=sun-jdk-1.5
311     </pre>
312    
313     <pre caption="Example /etc/java-config-2/build/jdk.conf">
314     <comment># For 1.3 I prefer sun-jdk 1.4 but when it is not available, use ibm-jdk-bin,
315 nightmorph 1.47 # For 1.5, use sun-jdk </comment>
316 nightmorph 1.23 1.3=sun-jdk-1.4 ibm-jdk-bin
317     1.5=sun-jdk
318     </pre>
319    
320     <warn>
321 nightmorph 1.47 You do not <e>have</e> to edit this file. If you change these options to use a
322 nightmorph 1.50 unsupported VM, things could possibly break. Because of the wide variety of
323     available VMs, we do not have the resources to test and verify every package
324     works on all of them. Bugs reported with a unsupported VM won't be prioritized
325     as much as bugs present within supported VMs.
326 nightmorph 1.23 </warn>
327    
328     </body>
329     </section>
330     </chapter>
331    
332     <chapter>
333     <title>Compilers</title>
334     <section>
335     <body>
336    
337 neysx 1.11 <p>
338 nightmorph 1.50 The standard Java compiler used for building is <c>javac</c>, which comes with
339     each JDK. In addition to configuring the VM used at build time, it is also
340     possible configure which compiler is used. Essentially, you define a list your
341 nightmorph 1.23 preference for which compiler to use in
342     <path>/etc/java-config-2/build/compilers.conf</path>.
343 neysx 1.11 </p>
344    
345 nightmorph 1.23 <pre caption="/etc/java-config-2/build/compilers.conf">
346     # If the ebuild supports it
347     # it will check the COMPILERS var front to back and
348     # use the first compiler that is installed
349    
350 nightmorph 1.46 COMPILERS="ecj-X.Y jikes javac"
351 nightmorph 1.23 </pre>
352    
353 neysx 1.11 <p>
354 nightmorph 1.23 Some compilers don't support all possible -target and -source arguments.
355     Therefore, each compiler in the list is checked to see if it can support the
356     desired -source/-target. javac will work in all cases, so if no other suitable
357     compiler is found, it will be used instead.
358 neysx 1.11 </p>
359    
360 nightmorph 1.23 <p>
361     More details about each compiler are provided below:
362     </p>
363    
364     <table>
365     <tr>
366     <th>Name</th>
367     <th>Handle</th>
368     <th>Package</th>
369     <th>Description</th>
370     </tr>
371     <tr>
372     <ti>javac</ti>
373     <ti>javac</ti>
374     <ti>N/A</ti>
375     <ti>
376     This is the default compiler that will be used, and comes with each JDK.
377     </ti>
378     </tr>
379     <tr>
380     <ti>jikes</ti>
381     <ti>jikes</ti>
382     <ti>dev-java/jikes</ti>
383     <ti>
384     Jikes was originally developed by IBM. Anecdotally, it is generally quicker
385     than javac. Note however, that it is more pedantic, and will fail under a
386     few circumstances where javac has no issue. It also does not support Java
387     1.5 syntax yet.
388     </ti>
389     </tr>
390     <tr>
391     <ti>Eclipse Compiler for Java</ti>
392 nightmorph 1.46 <ti>ecj</ti>
393     <ti>dev-java/eclipse-ecj</ti>
394 nightmorph 1.23 <ti>
395     ECJ is the compiler used by the Eclipse software development kit. It is
396     very full featured, and is pretty fast. It does support Java 1.5 syntax.
397     </ti>
398     </tr>
399     </table>
400    
401     </body>
402     </section>
403     </chapter>
404    
405     <chapter>
406     <title>Setting a default CLASSPATH</title>
407     <section>
408     <body>
409    
410     <warn>
411     The options explained in this section should be considered deprecated and will
412 rane 1.26 most likely be removed in the future. We strongly recommend against using
413 nightmorph 1.23 these, because your Java projects or application should ideally manage their
414     own classpaths. If you choose to specify a default CLASSPATH, some applications
415     may behave unexpectedly, because classes they weren't expecting would be on the
416     classpath.
417     </warn>
418    
419     <p>
420     <c>java-config</c> can also be used to set a system-wide default CLASSPATH, as
421     well a user-specific default CLASSPATH.
422     </p>
423    
424     <p>
425     First, you will want to list available Java libraries installed on your system
426     that might want to be put in your CLASSPATH. Here is an example of output:
427     </p>
428    
429     <pre caption="Listing classes">
430     # <i>java-config --list-available-packages</i>
431     [xerces-2] The next generation of high performance, fully compliant XML parsers in the Apache Xerces family (/usr/share/xerces-2/package.env)
432     [junit] Simple framework to write repeatable tests (/usr/share/junit/package.env)
433     [bsh] BeanShell: A small embeddable Java source interpreter (/usr/share/bsh/package.env)
434     [bcel] The Byte Code Engineering Library: analyze, create, manipulate Java class files (/usr/share/bcel/package.env)
435     [log4j] A low-overhead robust logging package for Java (/usr/share/log4j/package.env)
436     ...
437     </pre>
438    
439     <p>
440     Again, the names in brackets (<e>[]</e>) are the IDs that you have to pass to
441     <c>java-config --set-system-classpath</c>. Here is an example:
442     </p>
443    
444     <pre caption="Setting classpaths">
445     # <i>java-config --set-system-classpath log4j,xerces-2</i>
446     </pre>
447    
448     <note>
449     The current directory (<path>.</path>) will not be part of the system
450     classpath, as that should be added in your system's login profile.
451     </note>
452    
453     <p>
454 rane 1.26 You will have to update your environment by logging out, then in again or
455     sourcing <path>/etc/profile</path>.
456 nightmorph 1.23 </p>
457    
458     <p>
459     For users, <c>java-config --set-user-classpath</c> will create
460     <path>~/.gentoo/java-env-classpath</path>, which you should then source from
461 swift 1.41 your shell's profile.
462 nightmorph 1.23 </p>
463    
464     <pre caption="Sourcing user specific classpath">
465     <i>if [[ -f "${HOME}/.gentoo/java-env-classpath" ]]; then
466     source ${HOME}/.gentoo/java-env-classpath
467     fi</i>
468     </pre>
469    
470     <p>
471     If you really want a system wide or user default classpath you can add
472 rane 1.25 something like the following to your shell's profile. But we would advise
473 nightmorph 1.23 against it.
474     </p>
475    
476     <pre caption="Setting classpath">
477 swift 1.41 # <i>export CLASSPATH="${CLASSPATH}:$(java-config --classpath log4j,xerces-2)"</i>
478 nightmorph 1.23 </pre>
479    
480 neysx 1.11 </body>
481     </section>
482 swift 1.13 </chapter>
483    
484     <chapter>
485 nightmorph 1.39 <title>Java Browser Plugins</title>
486 nightmorph 1.34 <section>
487 nightmorph 1.39 <title>Installing a plugin</title>
488 nightmorph 1.34 <body>
489    
490     <p>
491 nightmorph 1.39 You can install a Java plugin for your web browser by emerging a Java VM with
492 nightmorph 1.34 the <c>nsplugin</c> USE flag set.
493     </p>
494    
495     <note>
496     <c>nsplugin</c> is not available for all architectures. Check for available
497 nightmorph 1.39 plugins on your arch before trying to install a VM by running <c>emerge -pv
498 nightmorph 1.34 &lt;java-vm&gt;</c>.
499     </note>
500    
501     <p>
502 nightmorph 1.39 Portage will allow you to install multiple versions of Java plugins, though
503 nightmorph 1.34 only one will be used by your browser. You can check the list of available
504 nightmorph 1.39 plugins by running:
505 nightmorph 1.34 </p>
506    
507 nightmorph 1.39 <pre caption="Viewing available plugins">
508 nightmorph 1.34 # <i>eselect java-nsplugin list</i>
509 nightmorph 1.44 [1] sun-jre-bin-1.6
510     [2] icedtea6-bin
511 nightmorph 1.34 </pre>
512    
513     <p>
514 nightmorph 1.39 In this example, <c>sun-jre-bin</c> is selected for the browser plugin.
515 nightmorph 1.34 </p>
516    
517 nightmorph 1.39 <pre caption="Selecting a plugin">
518 nightmorph 1.44 # <i>eselect java-nsplugin set sun-jre-bin-1.6</i>
519 nightmorph 1.34 </pre>
520    
521     <p>
522 nightmorph 1.39 Verify that the correct plugin was selected:
523 nightmorph 1.34 </p>
524    
525 nightmorph 1.39 <pre caption="Verifying the correct plugin">
526 nightmorph 1.34 # <i>eselect java-nsplugin list</i>
527 nightmorph 1.44 [1] sun-jre-bin-1.6 current
528     [2] icedtea6-bin
529 nightmorph 1.34 </pre>
530    
531     <p>
532     Java.com also provides a link to <uri
533     link="http://java.com/en/download/installed.jsp">verify your installed
534 nightmorph 1.39 plugin</uri>. Additionally, if you are using a Mozilla-based browser, you can
535     verify your Java plugin by typing <c>about:plugins</c> into the address bar.
536 nightmorph 1.34 </p>
537    
538     </body>
539     </section>
540     <section>
541 nightmorph 1.39 <title>Plugins on multilib systems</title>
542 nightmorph 1.34 <body>
543    
544     <p>
545 swift 1.41 If you are running a mixed 64-bit and 32-bit multilib system (for example, on
546 nightmorph 1.44 AMD64), you can use 64-bit and 32-bit Java plugins. Unless you have a pressing
547     need to run 32-bit Java applications, we recommend using native 64-bit plugins
548     on 64-bit web browsers.
549 nightmorph 1.34 </p>
550    
551     <p>
552 nightmorph 1.44 There are several native 64-bit browser plugins available. The default JDK/JRE
553     pair, <c>sun-jdk</c> and <c>sun-jre-bin</c>, both include browser plugins. Just
554     emerge one of them with the <c>nsplugin</c> USE flag enabled.
555     </p>
556    
557     <pre caption="Installing a 64-bit plugin">
558     # <i>echo "dev-java/sun-jre-bin nsplugin" >> /etc/portage/package.use</i>
559     # <i>emerge sun-jre-bin</i>
560     </pre>
561    
562     <p>
563     To use a 32-bit plugin on a 32-bit browser, you will need to emerge
564     <c>emul-linux-x86-java</c> with the <c>nsplugin</c> USE flag enabled.
565 nightmorph 1.38 </p>
566    
567 nightmorph 1.39 <pre caption="Installing a 32-bit plugin">
568 nightmorph 1.38 # <i>echo "app-emulation/emul-linux-x86-java nsplugin" >> /etc/portage/package.use</i>
569     # <i>emerge emul-linux-x86-java</i>
570     </pre>
571    
572     <p>
573 nightmorph 1.39 Next, check which plugins are available:
574 nightmorph 1.34 </p>
575    
576 nightmorph 1.39 <pre caption="Viewing available plugins">
577 nightmorph 1.34 # <i>eselect java-nsplugin list</i>
578     Available 32-bit Java browser plugins
579 nightmorph 1.44 [1] emul-linux-x86-java-1.5
580     [2] emul-linux-x86-java-1.6
581     Available 64-bit Java browser plugins
582     [1] icedtea6-bin
583     [2] sun-jre-bin-1.6
584 nightmorph 1.34 </pre>
585    
586     <p>
587 nightmorph 1.44 Now select the right plugin for your browsers:
588 nightmorph 1.39 </p>
589    
590     <pre caption="Selecting plugins">
591 nightmorph 1.44 <comment>(Choose the plugins for 32-bit and 64-bit browsers)</comment>
592     # <i>eselect java-nsplugin set 32bit emul-linux-x86-java-1.6</i>
593     # <i>eselect java-nsplugin set 64bit sun-jre-bin-1.6</i>
594 nightmorph 1.34 </pre>
595    
596     <p>
597 nightmorph 1.39 Verify the correct plugin was selected:
598 nightmorph 1.34 </p>
599    
600 nightmorph 1.39 <pre caption="Verifying the correct plugin">
601 nightmorph 1.34 # <i>eselect java-nsplugin list</i>
602     Available 32-bit Java browser plugins
603 nightmorph 1.44 [1] emul-linux-x86-java-1.5
604     [2] emul-linux-x86-java-1.6 current
605     Available 64-bit Java browser plugins
606     [1] icedtea6-bin
607     [2] sun-jre-bin-1.6 current
608 nightmorph 1.34 </pre>
609    
610     </body>
611     </section>
612     </chapter>
613    
614     <chapter>
615 swift 1.13 <title>USE flags for use with Java</title>
616     <section>
617     <title>Setting USE flags</title>
618     <body>
619    
620     <p>
621 rane 1.17 For more information regarding USE flags, refer to the <uri
622     link="/doc/en/handbook/handbook-x86.xml?part=2&amp;chap=2">USE flags</uri>
623 swift 1.13 chapter from the Gentoo Handbook.
624 neysx 1.11 </p>
625    
626     </body>
627     </section>
628 swift 1.13 <section>
629     <title>The flags</title>
630     <body>
631    
632     <ul>
633 nightmorph 1.23 <li>The <b>java</b> flag adds support for Java in a variety of programs</li>
634     <li>
635     The <b>nsplugin</b> flag adds support for Mozilla-like browsers (including
636 nightmorph 1.33 Firefox). You will need this for viewing Java applets in your Mozilla-like
637 nightmorph 1.23 browser.
638     </li>
639 rane 1.17 <li>
640 rane 1.28 The <b>source</b> flag installs a zip of the source code of a package.
641 nightmorph 1.33 This is traditionally used for IDEs to 'attach' source to the libraries you
642     are using.
643 rane 1.28 </li>
644 nightmorph 1.40 <li>The <b>jce</b> flag adds support for the Java Cryptography Engine</li>
645 rane 1.28 <li>
646     For Java packages, the <b>doc</b> flag will build API documentation using
647     javadoc.
648     </li>
649 swift 1.13 </ul>
650    
651     </body>
652     </section>
653 neysx 1.11 </chapter>
654    
655     <chapter>
656     <title>Additional resources</title>
657     <section>
658     <title>Off-line resources</title>
659     <body>
660    
661     <ul>
662 rane 1.17 <li>java-config man page</li>
663     <li><c>java-config --help</c></li>
664 neysx 1.11 </ul>
665    
666     </body>
667     </section>
668     <section>
669     <title>Online resources</title>
670     <body>
671 rane 1.17
672 neysx 1.11 <ul>
673 nightmorph 1.23 <li>
674     The <uri link="http://www.gentoo.org/proj/en/java/">Java Project
675     Page</uri>
676     </li>
677 rane 1.17 <li>
678     The <uri
679 nightmorph 1.23 link="http://news.gmane.org/gmane.linux.gentoo.java">gentoo-java</uri>,
680     <uri
681     link="http://news.gmane.org/gmane.linux.gentoo.user">gentoo-user</uri>, and
682     <uri
683     link="http://news.gmane.org/gmane.linux.gentoo.devel">gentoo-dev</uri>
684 alin 1.18 mailing list archives
685 rane 1.17 </li>
686 nightmorph 1.42 <li>
687     <uri link="irc://irc.gentoo.org/gentoo">#gentoo</uri> and <uri
688     link="irc://irc.gentoo.org/gentoo-java">#gentoo-java</uri> on IRC
689     </li>
690 rane 1.17 <li>
691     <uri
692     link="http://en.wikipedia.org/wiki/Java_programming_language">Wikipedia's
693     entry for Java</uri>
694     </li>
695 nightmorph 1.40 <li>
696     If you have suggestions or questions regarding this document, please email
697     the Gentoo Java team: <mail>java@gentoo.org</mail>
698     </li>
699 neysx 1.11 </ul>
700    
701     </body>
702     </section>
703     </chapter>
704 neysx 1.12 </guide>

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