I'm a senior java programmer and I'm used to building solutions from scratch. More often, though, I'm hearing people -- managers, clients, and other programmers -- suggesting we look for a COTS (Commerical Off The Shelf) solution.
Thing is, I know about programming, but I don't know about what COTS solutions are available or applicable to what I'm doing.
My question is, how should I best go about finding "COTS" solutions? Are there communities or a websites that focuses specifically on examining "COTS" solutions for programmers, or is it just like anything else, you google for existing products and hope to find a software application that does what you need?
Any help or suggestions are greatly appreciated!
Thanks,
Rob
One of the things I can say for sure about using a COTS product is you must be given access to the API and documentation. Far to often people run into the issue of paying X for a package and then not utilizing it properly. The other way to go is open source, as it is free and you can modify it as you see fit. Generally you will need to google up the specifics of what you want and you can find side-by-side comparisons for similar products, these however should be taken with a grain of salt. Take the list of products and set up test beds in your environment to see which works best with your current tools and programs and go from there. Vendors often give 30-60 day free trials of their software for this reason.
Good day!
With regards to my previous question about Java Swing being used for web development, I have a job interview today and they told me that their company uses Swing then convert it to javascript then deploy it on the web.
Can anyone explain this to me better? What books / websites should I study so that I could understand how this is done. Is this a good / common practice?
Thank you very much.
You can take a look at CreamTec's AjaxSwing. I've played around with it several times and it's the only product I know so far that takes your existing Swing GUI and converts it into something displayable in your browser.
Whether this is good practice or not is not really easy to answer. This solution works well as long as your application does not need to scale largely. CreamTec states that their solution is suited for about 50 clients IIRC.
The markup generated by AjaxSwing can in no way be called semantic but that is a common thing with these kinds of generators.
You can try AjaxSwing pretty easily since it does not require you to do much configuration but my recommendation is to use a dedicated web framework if you want higher scalability.
It sounds like GWT also. Granted that is not what the person said, but if it was a recruiter, they may been confused on the exact technology.
AjaxSwing is a run-time tool and needs a server license for commercial use.
You might want to try Mia Transformer www.mia-software.com. They change Swing Java code to GWT Java Code and GWT changes it to Javascript and then if you want you can use Google V8 compiler for faster execution. Of course it is not 100%. We are going to try it for a large project and see if it works.
The other link provided to us was http://swingweb.sourceforge.net/swingweb/. Have not checked it out though.
Will keep you posted. If you come across a workable solution please share.
I wanted to build a dynamic Website. The Architecture that I am planning to have is Linux+Apache+MySQL+JSP/Java/Servlets. I have heard a great deal about LAMP stack, but i dont know PHP. Please cite some differences between the two architectures in terms of scalability, security, code re-use, and stuff etc.
Also, having said all this, i need to know where could i get started from. any case-study that could give me an insight as to how to go about building a complete dynamic website.
Thanks.
The short answer is: Architecture isn't about languages, it is about usages. You can make a really slow, non-scalable, insecure, kludgy mess of java just as easily as PHP.
That said.
PHP is a traditionally less structured language. It is not type safe, and that is a double-edged sword, not a negative. My advice, as always, is to stick with what you know for anything mission critical. But if you want to fool around with PHP, the best way is to install it and start playing.
Good resources are this site, and php.net. And google. PHP has a huge hacker culture around it, you'll find loads of info about just about every possible topic. Good, bad, and all in between.
EDIT::
One thing I would do is avoid learning a framework first. Learn raw, un-cut PHP first.
I'm fairly new to programming and new to java, but I'd like to jump in the deep end with a little database driven website project. I've read quite a lot about requirements in the 'real world' requesting experience with Spring and Hibernate, so I have those installed on netbeans and a project created (if I hit run I get the default spring page). Now I just need a little guidance as to where to start designing my app (please tell me if I'm getting in a bit too over my head for a beginner!).
Should I start off with my classes? - create all my classes as they map to my database tables and decide which attributes and methods each will require?
Can anyone suggest any good books for maybe.. making a java based website from scratch (i.e. from design right through to deployment) that might be useful for a beginner?
Any help appreciated thanks.
Edit: since posting this I've found a brilliant book that fits my needs just right to get started. Firstly I tried both spring in action and hibernate in action - but found both to be a bit too heavy for my novice mind. Instead I got the Java EE 5 Development with Netbeans 6 book https://www.packtpub.com/java-ee5-development-with-netbeans-6/book and its been a great help. If you use netbeans and are in a similar position to me, I'd say pick it up!
Too over your head? Depends on what you hope to accomplish. Are you trying to create a revenue-generating site to which users will be asked to trust credit card numbers and other sensitive information? Then yeah, you're getting way ahead of yourself. Is this a tool for personal use or a toy you're throwing together primarily as a learning experience? Then I say "Pffffft!" to the notion of over-the-head-ness. Go for it.
As to where to start, I say start with whatever portion of this beast is clearest to you. Have a solid idea of what the database is going to look like? Then start with it and its supporting classes. Have a clear vision of what the guts of the code are supposed to do? Start there. Etc. And if all things are equal, I'd say start at the bottom with the database layer and work your way up -- but that's just me.
And as for the books, can't help you there, but I'm sure somebody can.
I suggest to take a look at web application frameworks such as Spring's Roo or Grails. Sadly I have no experience with Roo. But I do have some experience with Grails.
With Grails you will be working mostly with Groovy, a language similar to Python, but still using the JVM. You'll still have the option to use Java anywhere you like (I think). Grails (and maybe Roo too?) manages Spring and Hibernate for you.
As for books on Grails, I recommend "Grails in Action". I have read a little of "Grails 1.1 Web Application Development" and it also seems to be a good reference. BTW, netbeans supports Grails too.
Not trying to gut your goals, but if you are wondering whether to start with your classes, I would suggest you work on your programming skills more.
I'd suggest taking a look at Larman's "Applying UML & Patterns: An Introduction to Object-Oriented Analysis and Design and Iterative Development (3rd Edition)" as well as a book on relational database theory (you need to know how to model databases properly.)
You can try your hand at building a database driven web app, and it might give you an insight into how to do it, but you need have some programming maturity to take those skills into the non-trivial.
This is a completely personal opinion so please take it with a grain of salt: Before someone tackles the building of a data-driven application with the purpose of eventually being able to use it in non-trivial projects, that person needs to have a good exposure to programming (by good I mean a LOT, say 1-2 introductory courses, 1-2 intermediate and at least one junior-level course, perhaps a total of 15-30 credits.) Unless that person is a natural programming virtuoso, I don't see it happening otherwise.
I would suggest, if you are serious about programming, to spend a substantial amount on learning the fundamentals before tackling something like this.
Good luck.
My question is broader than merely expanding language specific skills. I'm wondering what sort of advice anyone might offer to someone with a desire for knowledge, but a lack of direction. Feel free to skip down to the question.
Background: I've taken a single computer science course in java at my University, but i'm planning on majoring in Computer Science and Electrical Computer Engineering (ECE). My java class was quite rudimentary. We were provided with a framework and merely edited/created a few methods and classes to perform a simple task. We made a version of Breakout, and created an AI for a simple connect-four game. Although I'm somewhat familiar with big O notation, I haven't actually studied it in class (My next CS class covers this). In my introductory ECE course we also programmed BOE-Bots in PBASIC to compete in an obstacle course of sorts. As an engineering student, I was also introduced to matlab, although I've only used it for linear algebra homework. In summary, I don't have much programming background, but I've loved pretty much everything I've done so far, and I'm looking for ways to build a more valuable skill set.
Steps Taken: After paying more attention to the programming section of reddit, I found a link to Project Euler. This summer I've been hacking away at those problems (finished my 42nd solution yesterday), but I'm looking for some more direction. I've been reading blog entries and SO heavily. I'd like to learn something about php, and perhaps create a dynamic webpage, but fundamentally I want to do anything in my power do to improve myself and prepare for the working world.
Question: What would direction would you recommend for me? Should I learn a new language? Keep attacking Project Euler? Read some books on programming? Start a coding project(I wouldn't even know where to begin)? Wait until school? Learn about more fundamental programming principles?
I guess with all the paths available, I'm just a little overwhelmed, and I don't want to fall into a path that might be detrimental to my career opportunities. I'm also really bad at making decisions. Your advice would be greatly appreciated!
The word quickly worries me... I suggest you read Teach Yourself Programming in Ten Years - Why is everyone in such a rush?
~~ Peter Norvig
Forgive yourself if you're not setting the world on fire three weeks after sitting down at the keyboard... maybe you're destined to be a late bloomer?
;-)
Most everyone is suggesting doing more programming. Whilst that's obviously important, I think it's important to understand the environments that your programs work in.
I would investigate how operating system work (how they allocate resources for you, how they schedule programs and threads), how networks work (routing, TCP/UDP behaviours and limitations etc.), and some database theory.
I see a lot of junior programmers with great language knowledge, but beyond the sandbox of their program they don't have a clue how the computer/network enables their stuff to run.
Knowing something of the above will make you a better programmer in terms of how you write your programs, and how you understand how they'll work (and indeed, how to debug them or analyse their failures)
There is only one thing that can improve your skills as a programmer: Program.
Reading books about programming is akin to reading books about cycling. It's not going to turn you into a cyclist.
Program something that you'll use and have a vested interest in. Then just put your head down and do it - reading any supporting information as you go.
Programming skills are just a small part of what makes a successful programmer, IMHO. Being able to read specifications, ask questions and interact with other people to extract the information you need to program are very important too. Pay attention to your 'soft' skills, they will help you a lot in being a successful programmer in a commercial setting.
I'd reccomend you take a multi-pronged approach. Reading books can only take you so far, since they don't provide you with practical experience in developing an application from scratch. Programming is much more now about writing code; you have to be able to design applications, read documentation, and know how to solve the needs of a customer who doesn't know how to tell you what to write.
If you're still in college, try to find an internship with a development firm. You'll get access to people and resources who already have this experience. If you for some reason can't do an internship, find and make a friend who is a developer. The impact of having someone who knows what they're doing to bounce ideas off of is immeasurable.
In addition to surrounding yourself with people with knowledge, you should also take on writing an application all your own. Pick something that interests you, but at the same time try not to make it too complicated, you don't want to frustrate yourself by writing a boring application, or choosing something that has too steep of a learning curve. Remember that the application is at it's core, a tool to assist you in learning, so it's OK if it turns out to be less complex then you imagined, or if the code you're practicing doesn't apply within the scope of what you're trying to write.
You definitely need to write code in order to become a better programmer. If you don't have a particular idea for a program to write, pick an open-source program (ideally one that you use), contact them and find out what they need done; contribute something. Fix a bug, implement a feature... start small and work your way up. This will help you learn about working on a team, writing maintainable code, preventing problems, and working on useful tasks. Much of what people write while learning to program is just exercise code, and not actually useful or representative of anything realistic. That is why a real, useful program is the best thing to do.
I saw an interesting link for a site called CodeKata that might help you. The important thing to get your skills going quickly is to actually code for practical problems that you will be likely to encounter in any real job.
Besides picking an interesting project and implementing it from scratch, reading others' code can also be valuable in improving your skills. Scott Hanselman has a good series on reading code: Weekly Source Code
Since you already know the fundamentals of programming, and obviously have the desire to learn I would start a pet project.
Nothing has forced me to learn great deals about a technology, language or idea more than having a fairly challenging pet project to throw my self into.
I would recommend, like rein mentioned, picking a project you really have a true interest in. Other wise it will get boring pretty fast and you'll have no idea why you are working on it. I think it would be wise to make the project fairly non-trivial. I always found the less trivial a project I was working on, the more I learned and took away from it.
Also If you live near a college/university research labs on campus are pretty much always looking for summer interns to work on code in one shape or form. Some will even pay you. I did this for 4-5 years through high school and some university and it was a great learning experience.
Obviously participating in an open source project is a great way to gain experience at working with other developers. Check out stuff on github, sourceforge, bitbucket.
I'd only caution you to ask for help and bother the core developers of a project you are very interested in and you are going to stick with. Generally open source developers dedicated to there project are few and far between. Their time is really valuable to the community and to waste it on someone who is just going to fly by night and never be seen again is kind of a shame.
It sounds like you are writing programs happily, and are a decent java programmer. So writing more might not be your most productive way of learning new things.
As a result, I'd say learn a new language - knowing more than 1 always exposes you to new concepts. As a java programmer I'd suggest C/C++ as they've immensely popular but they fill areas that the 'managed high level' languages don't go, the low-level high-performance, to-the-metal applications. If you learn C# (for example) you'll find you're just doing a different dialect of java (roughly) and you won't learn too much.
If you don't like the idea of C/C++, get into a scripting language instead - bash, VBScript/WMI, or perl or python. they'll be sufficiently different to teach you some good stuff.
Or do both!
You already know how to program; in order to prepare yourself for a real life job, the most important thing is probably not how to program better, but to learn the things you'll have to do that aren't programming.
In your workplace, you most likely won't be asked to write line "fire and forget" programs, but work in a team on large applications. In order to do that effectively, you need to learn:
How to communicate effectively with analysts, customers, managers and your fellow programmers
How to plan and coordinate work: using source control systems and bug tracking systems, working with written specifications, following a development process - "software engineering"
Perhaps most importantly: get used to working with other people's code - third party libraries, frameworks, and of course colleagues' code.
This, too, can most effectively be learned through hands-on experience in a real project. For me, the big eye-opener was working in a group of about 10 students in an experimental project organized by university with some industry support. Perhaps you can find or organize something similar at your university? If it has a chair dealing with software engineering, they should be happy to do something like that if they aren't already. Failing that, joining an open source project is good too.
Write programs to automate things that you do manually on a daily basis.
Like, todo lists, keeping accounts, checking RSS feeds.. the list could be endless. If you do some business on the side, write some simple code to assist you in that.
The essence is: to improve your programming, do programing! :D
Contributing to open source projects has a surprisingly high impact on your ability to develop software, as opposed to the ability of writing code:
you get to work on code written by others, which is sometimes brilliant and sometimes abysmal;
collaborate within a geographically distributed team;
get introduced to team politics ( yay! );
understand what it means to have actual users.
to quote just a few. Some good places to look:
Codehaus
Sourceforge
Google code
Find out about best practices (for example training videos on windowsclient.net). Get any problem and solve it using database as input and database as output. Start over several times. That's as close as you can get to the real world scenario. Read books recommended by Joel.
Here's my multi-prong suggestion:
1) Big picture work - Look at various Software Development methodologies and see how when you program you follow one of these approaches. You did some Java work, was that web, windows application, console application, or something else? Learning a little about the other types may also prove useful
2) Medium picture work - Have you looked at Refactoring and Design Patterns? These can be very useful but may require a bit more coding experience to see how they can be useful.
3) Small picture work - Study various algorithms and understand various trade offs one can make in choosing various implementations of a data structure, e.g. linked lists vs. arrays. There is a big white book about Algorithms that some use when studying them.
My multi-advise:
Keep training, and write code. Participate in small open source project.
Read standard book (here is the Jeff's list)
Learn from your mistakes, or better from the mistakes of others by reading site like www.badprogramming.com
From 99 ways to become a better developer:
Program! and try to diversify your work as much as possible
Find a mentor
Be a mentor
Learn about the different aspect of software development other than code (business of software etc.)