Programming in Java

Message

petrjanda · Post by **petrjanda** » Thu Feb 05, 2004 1:51 pm

Does anyone of you program java under linux?
Im doing a java programming course at school, and I will need a JDK on my linux box, so I want to ask what packages do I have to install?

plasmagunman · Post by **plasmagunman** » Thu Feb 05, 2004 1:56 pm

Code: Select all

emerge sun-jdk

should be the easiest and most up-to-date. but there are also a gpl implementation

Code: Select all

emerge blackdown-jdk

, which has some problems with 2.6-kernels and nptl compiled glibc, and

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emerge ibm-jdk

, which is the same from ibm.

Genone · Post by **Genone** » Thu Feb 05, 2004 3:34 pm

blackdown-jdk is definitely not GPL.

plasmagunman · Post by **plasmagunman** » Thu Feb 05, 2004 3:58 pm

Genone wrote:blackdown-jdk is definitely not GPL.

sorry, my fault. the last years i was so sure about that, that i never checked. i always thought that's the point of blackdown..

petrjanda · Post by **petrjanda** » Thu Feb 05, 2004 8:25 pm

plasmagunman wrote:
Code: Select all
emerge sun-jdk
should be the easiest and most up-to-date. but there are also a gpl implementation
Code: Select all
emerge blackdown-jdk
, which has some problems with 2.6-kernels and nptl compiled glibc, and
Code: Select all
emerge ibm-jdk
, which is the same from ibm.

how is that ibm ibm-different to sun-jdk?

KptnKrill · Post by **KptnKrill** » Thu Feb 05, 2004 9:12 pm

has more informative debugging messages

yak8998 · Post by **yak8998** » Fri Feb 06, 2004 1:24 am

if your doing it for school I'd recommend sticking with the sun version, assuming thats what your using

petrjanda · Post by **petrjanda** » Fri Feb 06, 2004 7:32 am

okey guys, ive installed sun-jdk, now in which program do i start writing applications and how do i compile them?

Rem · Post by **Rem** » Fri Feb 06, 2004 7:54 am

I've only just installed it, but haven't worked with it yet, to be honest, but I've heard that eclipse

Code: Select all

emerge eclipse-platform-bin

is pretty good.

Maybe you also need

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eclipse-jdt-bin

.

Rem

axolotl · Post by **axolotl** » Fri Feb 06, 2004 11:45 am

I would definitely recommend eclipse but maybe not the version you get via emerge. It is a bit outdated. Its better to download version 2.1.2 directly from http://www.eclipse.org

For more info on eclipse also see: http://forums.gentoo.org/viewtopic.php?t=131850

If you only need an ide for school with one file/class projects you may have a look at JEdit. I have not tried it myself but I heard it's quite good.

basvdijk · Post by **basvdijk** » Fri Feb 06, 2004 12:36 pm

petrjanda wrote:
plasmagunman wrote:
Code: Select all
emerge sun-jdk
should be the easiest and most up-to-date. but there are also a gpl implementation
Code: Select all
emerge blackdown-jdk
, which has some problems with 2.6-kernels and nptl compiled glibc, and
Code: Select all
emerge ibm-jdk
, which is the same from ibm.
how is that ibm ibm-different to sun-jdk?

Well I've got trouble with getting Eclipse to run. I'm using the 2.6.1 kernel and the blackdown-jdk. I get an error when I run Eclipse. Is it an option to install the IBM jdk?

petrjanda · Post by **petrjanda** » Fri Feb 06, 2004 1:28 pm

well i installed sun-jdk, eclipse and eclipse-jdk and eclipse-cdk, and works without a glitch

dfuse · Post by **dfuse** » Fri Feb 06, 2004 7:34 pm

Well I've got trouble with getting Eclipse to run. I'm using the 2.6.1 kernel and the blackdown-jdk. I get an error when I run Eclipse. Is it an option to install the IBM jdk?

I have the exact same setup, no problems whatsoever. What error do you get and what version of eclipse do you use?

dmartin · Post by **dmartin** » Fri Feb 06, 2004 8:13 pm

FWIW, I'm a Java developer working on Gentoo. I use Netbeans, but Eclipse is good too. It's a Gnome vs. KDE type discussion over which IDE you should use, so I won't get into that mess. Each IDE has its own benefits and limitiations.

But, if you have problems with Eclipse (basvdijk), perhaps it's an alternative. Eclipse uses the SWT toolkit for its interface, whereas Netbeans uses pure Swing. Nowithstanding the benefits of one toolkit or the other, if one doesn't work for you, it doesn't mean the other won't.

basvdijk · Post by **basvdijk** » Sun Feb 08, 2004 7:33 pm

Eclipse is now working, used the SUN SDK, the Eclipse-jdt-bin and the Eclipse-plaform-bin.

Trejkaz · Post by **Trejkaz** » Sun Feb 08, 2004 10:44 pm

I'll throw in a quick comment here, KDevelop 3.0.0 appears to be in portage, and does come with some Java support out of the box, although not nearly as much as Eclipse (it has no code refactoring, AFAIK.) However, KDevelop is a native application, runs faster and uses much less memory than Eclipse. Also I heard from a friend that it's possible to plugin a GVim editor which in the end is what made me just emerge it.

So if you're starting to get annoyed at how slow Eclipse renders its code window, there is another option which isn't NetBeans.

Oh yeah, btw... there is a plugin for Eclipse which implements Vim editing also. The Eclipse plugin is written entirely in Java from the ground up, so it has some minor differences from the real Vim, but it's not too bad actually. I kinda wish someone would port it to IDEA so I could use it in that. >:-)

alwyn · Post by **alwyn** » Tue Apr 13, 2004 4:34 am

Do you know if kdevelop supports code completion for java?

des09 · Post by **des09** » Sun Apr 25, 2004 12:51 am

I am a web applications developer, and have worked on various windows, linux and sun flavors. For the last few years I have been very happy on Gentoo, any linux distro is a good choice for Java.

btw, be sure to check out ant http://ant.apache.org, its the best thing to happen to real java development in years

Code: Select all

emerge ant

Also, a great (free) book on java for someone familiar with programming is http://www.mindview.net/Books/TIJ/

nephros · Post by **nephros** » Sun Apr 25, 2004 1:01 am

Just for completeness I'll throw in that the other big IDE for Java is NetBeans, very feature-rich, but does have some speed issues (especially the GUI redraws).
A nice thing is the built-in tomcat server so you can test webapps right from the IDE. I also liked the cvs support, but I guess that's standard for a IDE.

brantgurga · Post by **brantgurga** » Sun Apr 25, 2004 8:34 am

As for as compiling Java, you just need a text editor. Save .java files and then run javac (yourfile).

As far as IDEs, jEdit is pretty good. You get syntax highlighting and folding built-in. You can then add on compiling and Ant support through plugins. There are also plugins to change the interface, run JUnit, run PMD and other Java syntax checkers. The only downside to it is that, being a Java application, it runs slow.

squallbsr · Post by **squallbsr** » Mon Apr 26, 2004 3:26 pm

Regarding preformance issues with Java-Eclipse. I'm running an Athlon 900 with 512mb ram - there aren't any real preformance issues. I'm running blackdown-jdk and eclipse 3.0M7. Everything runs all nice and pretty - the thing I have noticed about Java programs and the jvm is they are memory hogs. I have run Borland JBuilder X when its using 90mb ram on my 128mb laptop - talk about slow there. If you plan on developing java - have some memory... btw-Eclipse has a much smaller footprint than JBuilderX. ~(35mb).

My 2cents - don't mind me, I'm just rambling, bored at work...

Programming in Java

Programming in Java

java developer on gentoo...