I am new to JSR 223 (java scripting API), currently I am working on a project to reduce the complexity of writing customization script for application so we are creating an in house scripting to generate the customization script.
However it is my first approach at working with the scripting API and the closest I have to a background knowledge of API is a tutorial from javaworld.com.
What I had like is for someone to point me to a detailed tutorial of implementing this API and including definition of script keywords and implementing them or perhaps point me to another approach at solving the above stated challenge.
I will appreciate any form of assistance. Thank you.
After much research I realized that I was not really asking my question right, what I want to develop is a DSL using java and the tool I require is ANTL.
Thanks everyone.
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I need to make a demo web project with extensive support for reading and editing WM(T)S, like this project. For technology Java or .NET are possible solutions. I tired GeoMajas for couple of days now, but it get annoying error about refresh of main map that I can't solve. Also, community support is non-existing as there are only mialing lists about development of GeoMajas, no forum to help solve this problem. Any advice on what framework to choose?
I would suggest looking at one of the following
Openlayers http://openlayers.org/
Leaflet http://leafletjs.com/
Geo Ext http://opengeo.org/technology/geoext/
These are all java script libraries so if you really need to you can inlcude them in a Java or .net based website.
If your looking for a more complete framework I would look at the OpenGeo suite. If you download it and look at the Geoexplorer app makes a good starting point and it uses the OpenGeo GSP Libries which are basically a warpper around GeoExt and Openlayers.
I am thinking of developing a django / ruby on rails frame work for java , (may be java on rails :)) .Can any one give me some pointers to start with,I know we have grails or play framework in java. But any tips will be help will be helpful
I think that you have somewhat answered your own question. The steps I would go through are
fully understand django / ruby on rails
look into Grails and Play Framework, specifically looking at the source code and the architecture of the framework
come up with an architectural plan of how your new framework would work.
I would suggest not doing this on your own though. You would be much better off trying to gain support from other developers who see a similar need as you have, and try to do this collaboratively. They will question design choices and help to ensure a better all round product.
You can take a look at http://javalite.io. This is a full stack database and web framework for rapid development, much like rails, but for Java devs.
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I am a .NET developer (and have been for a while now). I work for an organization that was just recently acquired by a larger company whose primary development language is Java. There are a few .NET developers, but the ratio of .NET to Java has decreased substantially now that the teams have merged.
That being said, I've decided it would be best for me to start Java development. However, most of the books I've seen so far for "learning Java" all take a very basic approach (what is a class, OOP principles, etc etc). I am comfortable with this part of development and don't need a primer (unless there are differences so profound that someone recommends the fundamentals from a Java perspective...).
Anyway, I'm looking for a book recommendation for Java development from a software developer's perspective that discusses today's techniques. For example, MVC architecture, application best practices (I am a web developer, this includes web services), is it worthwhile to work with JSPs or consider Ruby instead, etc etc.
A HUGE bonus would be "learning through doing". Something like Murachs, where I can step through a project from start to finish, and is light enough on fundamentals that I don't get bored. I'm hoping to walk away with enough basic knowledge to volunteer for some internal projects and grow from there.
I'm sorry if my question is needlessly broad, but I'm struggling to find a starting point aside from my Eclipse installation (I am doing this on Ubuntu, deliberately avoiding Windows).
Thanks for any direction or insight you can offer.
EDIT - After discussing with a co-worker, and reading Bert's great suggestion (all of them have been excellent, thank you all very much), it turns out the main focus is on EE, and Glassfish. They use NetBeans for development, since it is tightly bound to Glassfish.
This doesn't mean much to me, except that I think the parallel drawn is IIS/Web apps to Win32 apps. But perhaps it will help clarify some of the more open-ended questions in my OP.
Effective Java By Josh Bloch
It may not be "learning by doing" but it gets into the details of how to use the Java language effectively.
I would then complement it with Java Puzzlers by Josh Bloch and Neal Gafter
My best bet is to learn Spring based on your requirements:
MVC architecture, application best
practices (I am a web developer, this
includes web services), is it
worthwhile to work with JSPs or
consider Ruby instead, etc etc.
You can start by visiting SpringSource at http://www.springsource.org/
There are a few points I would like to make to you:
The basic Java language is rather small and C-ish. To my understanding C# and Java works almost identically here.
The Java runtime library is VERY, VERY BIG, and rather unlike C#. Very few people know all of the Java 6 runtime library well.
There are several IDE's in common use for Java. You will want to learn the one used by the rest of the team.
I would suggest having a brisk walk through the Oracle Java Tutorial, just to get the hang of the spirit and do some of the exercises, and then look at the common "Java for C# programmer" cheat sheets on the internet. Then do a lot of code, and then read Effective Java.
(For those who think they know Java 6 runtime well, please consider if you are familiar with RMI, the Rhino Javascript engine, and XPath in the XSLT implementation and all the rest)
Please look at the following thread:
https://stackoverflow.com/questions/75102/best-java-book-you-have-read-so-far
Ruby makes no sense unless you're writing JRuby on the JVM.
If you're writing web apps, you'll need to know JSPs written using JSTL (JSP standard tag library), servlets, HTML, CSS, and JavaScript. Download Tomcat from Apache - it's a servlet/JSP engine that will let you deploy web apps locally for learning. It has an HTTP listener built in, so you don't need IIS or Apache.
You'll need to know how to create and deploy a web archive (WAR) file. That's a ZIP file that contains the standard format for a web application.
I'd have a look at the Tomcat "first web app" docs to get a feel for it.
Once you have that, come back and talk about frameworks. (When you do, I'll recommend Spring.)
Here are some references I like. I'm sure there are better, but there are the ones I have read and can vouch for:
Java in a Nutshell is a classic summary of the core language. If you need more, there are books like Java for Programmers for programmers transitioning to Java (I have not read it).
Sun's Core Servlets and JavaServer Pages was a good book for Java servlets and JSPs. But consider that a lot of web tech is built on top of this (e.g. Spring), so this may be giving you foundation but not direct knowledge of the specific framework you will be using. Also a lot of web tech these days are client-side/JavaScript/AJAX-based, e.g. jQuery.
As for MVC, consider focusing on MVP instead. I been playing around with Google Web Toolkit to leverage my Java background to create client-side apps, but it is also a good way to get some idea of MVP - read Large scale application development and MVP Part I and Part II, and the GWT MVP Development with Activities and Places. However, GWT keeps evolving.
My last suggestion is that you narrow your focus - try to figure out what frameworks are popular at work and decide if you want to focus on a tier: front (e.g. HTML/CSS/jQuery), middle (e.g. Spring), or back-end (e.g. Hibernate). Once you figure this out, then post a more specific question(s) (e.g. what are the best resources for learning XYZ).
Just from my experiences with java (limited but I took a Web Dev course teaching JSP's) Any decent technology for it is usually 3rd party. However, from what I can tell when doing web dev I would use Netbeans, Netbeans has Tomcat built in especially in Ubuntu for easy debugging.
More on similar lines you can find answers from this post
https://stackoverflow.com/questions/3820437/life-after-head-first-java/3820449#3820449
The Java landscape is quite wide as you probably have already figured out.
There are hundreds of frameworks and tools that can be used for basically doing the same thing. To get an idea, you can take a look at this presentation written by Matt Raible, where he compares a number of Java web frameworks.
As someone else suggested, you should definitively take a look at the Spring Framework. It is widely used in the enterprise world. There are several good books about Spring.
If you want to get the basics of Spring MVC in a "tutorialized" style, you can take a look at this book. It doesn't cover the latest Spring version (3.0) and it is not a "perfect" book, but it should allow you to get the basics while running some examples.
Also, there are literally thousand of Spring-MVC tutorials on the web.
For instance, you can take a look at:
http://www.adobocode.com/spring/a-spring-web-mvc-tutorial
RESTful services are also quite popular these days. I have been working with the Resteasy framework from JBoss and I found it very easy to setup and work with. This book explains the REST architecture and uses Resteasy as framework for the examples.
I also recommended "Head First Design Patterns" from O'Reilly. It covers the most important patterns using Java and it will help you to see how the language can be used for patterns you may be already familiar with.
One more suggestion: you may considering "tuning in" on Java TV. It's a great resource with hundreds of Java tutorial videos. It covers a wide spectrum of technologies so you should be able to find something for you.
I am trying to review the different available wiki engines and was interested in one that is java based. Could you recommend or list any java based wiki engine so that i can have check it out.
I am familiar with the following JSPWIKi, Elsie.
Thanks
There are quite a few available. I'd check out the open-source ones first.
I have to say XWiki impressed me most, but that was for a feature set we were looking for quite a while ago, it may not match your exact needs...check out the full list I linked, see if anything fits you well.
You might like to think about Confluence. It's not open source, but it's extensible, if you wanted to make some kind of plugin.
I'm using JSPWiki since a few years.
JSPWiki is a feature-rich and extensible WikiWiki engine built around the standard J2EE components (Java, servlets, JSP).
VQWiki and Confluence have worked well for us.
Another great Java based Wiki engine is GWiki http://labs.micromata.de/display/gwiki/Home it can be embedded and extended by macros written in in Java or Groovy.
I am a .NET Developer with about 5 years of web development experience using Microsoft technologies starting with classic ASP to ASP .NET 3.5.
I do have a little background in Java as well and can write/understand Java code very easily. I am looking for resources (online, books) that are compatible with my .NET experience. I am only interested in web development in Java and want to start at intermediate level even if it may require me to look up some details.
What path or resources would you recommend for intermediate .NET web developers to gain equivalent proficiency in Java web development tools?
Get an IDE: IntelliJ (my preference), Eclipse, Netbeans;
Get an application server: Glassfish (my preference; either v2 or v3 Prelude), JBoss or, if you're feeling adventurous, SpringSource dm server;
Get a JDK eg 6u11;
Get a copy of Spring 2.5.6 (or 3.0M2 if you're feeling adventurous);
Get a copy of the Spring reference documentation;
Put the pieces together.
Get yourself a copy of eclipse, and just start reading other people's code, and reading some java docs. The Java website has all the docs online, and they're one of the best language specs I've seen.
Really, if you know C# pretty well, Java should be a cake walk. The languages are pretty similar, so you just need to get to know the different frameworks.
Probably the most helpful book in regards to learning Java's web development framework, Java Server Faces:
Core JSF
- Great examples and explainations throughout on the whole process of using the JSF Framework.
And of course for anyone new to Java I would recommend:
Effective Java
- Covers various design patterns and practices.
In my experience that official Java exams are better than the .Net equivalents, so it may be worth starting there?
Search for a servlet/JSP tutorial (Good, albeit a little old, example here).
You'll get basic knowledge of Java web application development.
Whatever your level is, JSF for Nonbelievers is the best introduction to JSP/JSF.
I'd check out Bitter Java.
It's a book that shows you the wrong way to do things, why it's wrong, and then it shows you the right way.
It pretty much falls in line with the evolution of the j2ee framework. Started with servlets, then moved into jsps, then command pattern, etc.