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I have read this question it is very detailed about technical aspects.
For my application (client for online game) I have created Executable JAR and published it to a website.
Since I am just starting to promote, I face some issues regarding trust. People say that it might virus or trojan or some other malware software. If I need to download it myself I would also have these kind of worries in mind.
So how can I persuade people that it is not a malware?
I think about:
Market for Java apps
Some online antivirus service
Jar signing
I think you can make a Installable Setup file using free tool called Inno Setup. This is cool, simple, configurable (ofcourse free) installer maker tool i have ever used. I have been used this tool for my numerous java desktop projects.
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I have a piece of java code I would like to run in my web browser and publish online. How can I do this without using applets? I have tried java vertx but I am not sure how to use it and there are no good tutorials online.
The short answer is you can't. Browsers don't "speak" Java natively, which is why applets required a plugin. As you probably know, Google is in the process of removing support for the plugin technology used by the Java plugin (NPAPI) and so soon Java won't work in Chrome at all (it already doesn't under Linux).
Your only real options are:
Provide a means of running it server-side, like http://ideone.com and various other "online" compilers do.
Translate it from Java to JavaScript (either manually or using a tool), which the browser can then run. But note that Java and JavaScript are not only markedly different languages despite a superficial similarity in syntax, but the standard environment for each is also quite different from the other.
How you do either of those is much too broad a question for SO.
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So I am currently working on designing a game that will be multiplayer and to prepare for this I have begun looking at hosting options. Besides hosting from my house on a dedicated server, the best and cheapest option I found was the use of VPS, more specifically Dotblock. Now dotblock has both linux based and windows based VPS but the windows one is a lot more expensive and so my question is whether or not I will run into problems if I code my server program in java on my Windows computer but then eventually host it on a linux based VPS?
As far as I know there should be no problems but if there will be, what are they, and if there are no problems what limitations will I have while coding? I understand I cannot reference anything Windows specific but will things such as time and tracking the mouse using LWJGL should change?
Thank you in advance and I hope you guys can help me out!
Overall it's relatively straightforward- that's one of the advantages of using java over other languages. I will offer you this advice; make sure you handle file paths in an environment-agnostic way. I've seen more than one error log on linux complaining that it can't reach 'c:\some\weird\path'.
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I usually code by myself but currently I need to do a java web-based project with 8 of my friends. I would like to ask the following questions:
1) How to document the development properly? Like how to keep a daily log? Any software or format suggested? What things do you think are important to be included in the log?
2) How to code together? Is there any software/IDE that allows a team to code together? Something ike google docs?
3) How to do a proper backup for a team project? Any software or tips to share?
Thank you very much!
Collaborative coding: its not the IDE that you can thank for collaborative coding, its all in distributed source control... like git or mercurial. Svn is also good for source control but is less good for collab.
Backup: git and mercurial solve this problem.
Documenting the project's progress is best suited in a task manager / project manager of some kind. I use projo project manager.. mostly because I wrote it. There's other well known apps out there like basecamp, and competitors.
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I've recently learned core Java and want to develop my skills further with practice of programming. Instead of starting out with my own project, i would like to follow a well documented and organized project which would help me understand the language better.
Can anyone please suggest some open source projects to get involved in ?
look at http://java-source.net/
my personal favourite open source java project is JDownloader
I would advise you go through some of the Free / Open Source Software sites that host the projects and start filtering your searches for Java projects with a high number of users / downloads, as they tend to be fairly mature and will allow you to start looking through them.
My main recommendation is Arianne (http://arianne.sourceforge.net/). It's won several awards and is quite professional. There are only two listed developers, and they seem quite friendly. Plus, it's a multi-tier video game engine, so there's plenty of fun you could get out of working on it.
Otherwise, check-out java.net, kenai.com, and sourceforge.net for more possibilities.
If you want an early project with potential, there are plenty, but it can often be the luck of the drawer with those.
Following are good places to contribute in open source projects..
Sourceforge
IBM DEV
I also Advise you to use Android (Mobile development) . You can make business apps and Mobile Apps using Android.
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I have a old LG MG280 cellphone that I'd like to code some simple things for. It has Java support, but I know that it is not simply making a Java ME application. It has to follow some specific specs otherwise the app will not run. Does anyone know what those specs are?
JavaME platforms are made up of a profile and a configuration. Most mobile phones use some combination of the Mobile Information Device Profile (MIDP) and the Connected Limited Device Configuration (CLDC).
The LG MG280 you are interested in uses MIDP-2.0 and CLDC-1.1, which is pretty standard.
To get started with development you'll probably want to be using the Sun Java Wireless Toolkit (frequently abbreviated to SJWT or WTK). Or, if you are a windows user, you can use the (newer) JavaME SDK 3.0. This gives you tools needed to compile/package applications and an emulator which lets you run/debug application on a desktop computer.
There are numerous tutorials available online. Here's a few to get you started:
http://today.java.net/pub/a/today/2005/02/09/j2me1.html
http://developers.sun.com/mobility/midp/articles/wtoolkit/
http://developers.sun.com/mobility/learn/
http://www.developer.com/java/j2me/article.php/1561591
Find out which J2ME profile it has - MIDP etc. Then find an appropriate tutorial, such as this one.