I don't know if I've been looking at the wrong place but it seems the documentation for this is very limited on the Oracle website. (Even on google)
I'm working on a school project in which we have to make a software in java and embed it on a micro controler. The program is never actually going to be put on a microcontroller though, we just have to develop it.
I've been looking at the Java SE Embedded, ME Client and ME documentation for the better part of 2 hours now and I still have no idea where to start.
Here's what I need to do.
I would like to develop it in eclipse preferably because it's connected to our repository. (we could use netbeans if it's not possible with eclipse)
We need a way to load the software on a microcontroller. (like an eclipse plugin)
We need to be able to run the program on a UI that we will code to test it and to show our teacher that it works.
We almost had it going with the Java ME Embedded but there is no way to make a UI to test it.
If someone can give me a link to a tutorial or anything would be much appreciated.
Thank you
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Edit
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I need to specify that we can choose any microcontroller or any range of microcontroller.
Does this need to run directly on the micro or can there be an OS? If you are allowed to run an OS then take a look at the beagle board which has several JVMs available (See http://elinux.org/BeagleBoard#Java)
For a lower cost alternative, Raspberry Pi offers a JVM as well (See http://www.raspberrypi.org/archives/4920)
Both the boards I've listed above are well supported by the community so you should be able to find lots of information by utilizing your favorite search engine.
If you need to run java directly on the CPU, then it appears your options are more limited... A quick search turned up a company called ajile systems who make a CPU module which can directly process java bytecode.
Related
I found a lot of discussions around this point but speaking either of a Java program running from the jar (in this case it is easy to replace it) or a C# application (I do not have knowledge on C#).
I use a tool (install4j, ..) to generate an installable file for Windows from the jar of my java swing application. My product installed and running on Windows should be able to "auto-update" itself, so I must have a component in my application that checks online if a newer version was to download and put in place of the currently executing.
I do not know how my application is installed in Windows (where are put the files? in one place? ... ) So what can I do to replace the current version being run with a new version (probably from a new installable file télchargé in this case) ? what's the best way?
how can I hide the questions like "do you accept ...?" and keep the original configuration during the update?
The problem for me is that my client wants/does not necessarily install java
Use the Deployment Toolkit Script to ensure the client has a suitable minimum version of Java installed. Then deploy it using Java Web Start to provide auto-update. I realize you don't want to make the client install Java, but you might be making the client install Windows if you make an executable. You'll typically lose more users by forcing them to install Windows, than by forcing them to install Java.
Now, when I give this advice to some people, they say words to the effect:
But my client only uses Windows OS! It will never be run on Mac OS or Linux/Unix.
And to that I would point out:
OK fine, but it seems yo are trying to make a left-hand turn at a right turn only intersection. If you need to turn left, you should have done that 6 blocks back.
What I mean by that is: Windows has its own languages and IDEs specialized for Windows. Being a language designed for Windows would mean it has:
Better ways to delve into the OS. Java keeps its functionality to a core set of functions that can be reliably supported across all major platforms. Anything beyond that requires native code.
Faster development time for any GUI elements. Java GUIs need to be designed using layout managers which are harder to learn and not conducive to Drag-and-Drop GUI design, which can be much faster.
A Windows based language probably has a slew of APIs and tools for providing auto-update, or if not, more free or reasonably priced 3rd party APIs for that.
..there are customers who imposed to not install java..
There is something you don't seem to understand. The GNU Compiler for the JavaTM Programming Language compiles code to natives. That is the only way to 'turn a Java app. into an executable. The GNU Compiler..
..supports most of the 1.4 libraries plus some 1.5 additions.
It does not even claim to support all of Java 1.3.
There are other utilities to install Java apps. with a private JRE. It might seem the JRE installation is invisible to the average user. But the power user would not be fooled. E.G.
Look and Feel
A Swing based app. using the Native Pluggable Look and Feel might look 'much like' a Windows app., but many people can still tell the difference. Swing does particular components differently to native Windows components (most notably JFileChooser, but there are others), and although the rest of the components look a lot like Windows equivalents, they are not exactly the same. Even the AWT based FileDialog looks different to the Windows file dialog.
Security
If the user has a problem with their PC and decides to kill a misbehaving app. they might type the following command sequence to bring up the Task Manager: Ctrl Alt Del
Even most non-power users know that key combo.
Now, let's say I am a potential customer that thinks 'Java is insecure - I don't want it on my PC'. Your app. comes along, I look at the box, no mention of Java. Good so far. Look at the one or two screenshots of it on the back of the box - looks much like a Windows app., OK.
So I fork out $24.95 for it.
I get it back to the office, install it and run, thinking:
It has an odd feel to it, but I'm too busy now, I'll check it out later.
Then I go surfing off to the net, visit a site infected with malware, and that malware causes MS Word to lock up. So I go to kill MS Word in preparation for restarting it, but.. As I'm scrolling down the available processes I notice.. Java is running.
What the huh..?
I immediately kill every Java process and see.. your app. drop off screen.
Let's go even further to assume the Malware (that is still running) goes on to cause $2000 damage to my hardware & wipes the client database I spent 3 years putting together ($50,000 loss).
I would get on the phone immediately to my lawyer and take you to court, suing you for the sum total of $1,052,024.95.
Later, in court:
Judge: What is the million collars for?
Me: Mental stress, your honor. The defendant lied to me and now I have become paranoid. Since that malware was installed, I've lost my business, my home, my wife and my peace of mind. It has caused me to become deeply depressed and I am experiencing suicidal thoughts.
Who do you think the judge is going to side with? Do you really think you can prove that your app. was in no way responsible for the problem?
Sure, you can put a disclaimer on the box:
No claims of responsibility, use at own risk.
But there are any number of US states as well as other entire countries, that will toss that entire End User Lisense Agreement right out the window and hold you responsible.
What I'm getting at, is that you are taking a huge legal risk to pretend that a Java app. is anything but a Java app. So don't do that!
I am also very keen to know that, as per my knowledge, I deployed my application using JNLP (java network launch protocol) after signing your jar file, Client's jar itself replace with the newer version.
The confirmation question "Do you Accept" in JNLP is because of the certificate windows security and JVM certification didn't recognize that.
here is tutorial for JNLP
http://www.mkyong.com/java/java-web-start-jnlp-tutorial-unofficial-guide/
I'm going to implement a honeypot for Android Smartphones as a research for my dissertation. I have never used android, java and honeypots. This the way i'm thinking to start this. I thought to use the source code (written in C language) of Honeyd which is a honeypot designed by Mr. Niels Provos. In this case I like to use eclipse 3.7 indigo for java developers. But the problem is even if i convert the source code of Honeyd to java, will the features work same as the way they did in Honeyd. Also I'm going to run android gingerbread (version 2.3) ISO in VMware workstation and try to install the converted Honeyd inside of it as a .apk application. after that i'm going to set up the virtual machine in the network to be attacked. Also I can't set up a physical high interaction honeypot as it is dangerous. so i'm concentrating on setting up a virtual low-interaction honeypot. I have some question dwelling in my head.
1) converting the Honeyd to java 2) Will Honeyd structure work for android platform? 3) As honeypots put on its own network behind a firewall, how to use this step regarding Android? 4) How to give a good alerting mechanism?
Could you please suggest me any help regarding this.
You can probably build the existing C code using the NDK.
The "proper" way would be to build it as a library and call into it from your dalvik (ie, what you code in java) application process. This also makes it easy to use java ui components for an alerting mechanism (otherwise you could have a java app or even something remote on the host that is monitoring the honeypot process for alerts)
While unsupported, many people have also had success building stand-alone command-line executables using the ndk toolchain and launching these. Since you are dealing with a customized android rather than a device, you shouldn't have too many problems with that - you can set OOM killer values on your stand alone process, and if you want you don't even need to run the android framekwork at all - you could just run on the linux that underlies it. Though one might ask what the point of the exercise would then be.
Essentially, if you are on a customized "device" (in this case virtual) and you don't really need any UI, then the only thing really unique about android is having to build C code against the bionic libc rather than a more normal embedded linux one; and even then, you can use a different libc if you statically link.
If you try to use java code to do it, you will likely run into the limitation that there is no good way to grant root access to java code, so you would have to either modify the platform to more easily run custom java code as root, or modify the underlying linux to let unprivileged code open privileged ports.
Frankly, I don't think this is a very good project idea, as you are talking about exposing a specific platform to a threat that probably isn't focused on it.
Hi all this is my post on stackoverflow.
I am normally a lurker and find everything I need without posting but was drawing some blanks when trying to picture how this works. Maybe if someone can provide some insight I would greatly appreciate it.
So I understand the software development cycle and know a decent amount about code
(c++ and Java, and visual basic, I am a CIS major with a CS minor in my last year). I can write some programs in elipse using Java and I can even make some basic GUI components in eclipse using Java.
Now onto my 3 part question: I understand one could make a .jar from several .java files and distribute it, but while thinking about a common program like say yahoo messenger (just as an example) I came to the following three part question:
First, being could you write a program like yahoo messenger in just eclipse using Java or would you need other tools like other languages and other development environments, how does the project go from start to finish? (I think I am kind of lost here because I have only wrote command line and simple GUI applications).
Second, Say it was easier to create a feature in yahoo messenger using a different language, how can one write one program in more than one language? Say for example you wanted to write some code in python or c++ and your the majority of your code was in Java, ie your main method is java and you are compiling using JVM. (assuming you cant just stick python or c++ code in a java program) I did some Googling around and saw some things about linking the compiler and including native code to include other language code in a Java project. Links to other reading material is acceptable too if the explanation is too long.
Third- How does deployment work? Say I am done writing the code for my program and want to turn it into an .exe (for windows users) and stick it on my site for people to download. I know windows comes built in with an iexpress utility to create .exe's. Besides distributing a .jar how would one go about turning source into an exe? Thanks again for all your input and time. I am a beginner and trying to wrap my head around these concepts. The answers can be provided in a technical realm or just conceptual either is greatly appreciated.
-Mark
1) I most cases you can write your program in java without needing any other programming language. There are rather rare cases where you need to call a dll from java to interface with some proprietary program, for this you would need to use JNI and C or C++. A perhaps more common case for using multiple languages is for adding scriptability to your application. For example, my company offers a server/client application that is scriptable by users using Groovy, but the server and the rich client itself are written in Java only.
2) The integration of java and another programming language depends on the other language. Integrating Groovy is easy, and I think integrating Python (using JPython) or Ruby (using JRuby) is fairly easy. But it is an effort (not to mention the mental stress of programming in different languages) and I would not recommend doing that unless there's a specific requirement for this.
3) As always, there are several options. See how-can-i-convert-my-java-program-to-an-exe-file for creating a windows executable. Or you can create windows installer using e.g. NSIS. Or use Java Web Start.
If the intent behind this question is getting an idea how some big java rich-client (desktop) applications are written and deployed, I recommend the Eclipse RCP book. This book will walk you through the development and deployment of an XMPP/Jabber messenger client using the Eclipse RCP framework. Be aware though that there is no one true way of creating a big application and other java application frameworks do things differently.
Several IM clients are written in Java, though I would hazard a guess that the mainstream ones would be mostly written in C, C++ or (on the Mac) Objective-C.
Writing the one program in multiple languages has numerous challenges, and the nature of the challenges varies depending on the combination of languages you want to use. In many cases, you will probably not have much luck combining more than two languages. One set of impedance problems is bad enough, three is an almost guaranteed disaster.
You can avoid these problems by splitting a single application across multiple programs, each of which is written in a single language and communicates with the other programs via some kind of IPC mechanism.
Creating an "exe" is also a very language-specific concern. For instance, Java, C#, C/C++, and Python all have radically different deployment stories.
Say I am done writing the code for my program and want to turn it into an .exe (for windows users) and stick it on my site for people to download.
In that case, I'd say you were foolish. ;)
Java Web Start is a better option for deploying a Java based rich client app. from a web site. JWS works for any platform with Java.
I'm really confused - but really it's pretty wierd because I know two programming langauges but I can't figure out something simple like this...
I've been looking for ages but I can't seem to get my head around it.
You See, for a long time I've been writting in AutoIt, and I've written two programs in it that are due to go on sale soon! They were never meant to be out for a long time though (kind of like Windows Vista), so lately I've been learning Java with success. I've wrote a few very very simple applications in eclipse while going through Java tutorials! I'm now ready to transfer my programs to Java, to gain me a wider market due to Java's cross-platform ability, but I never anticipated distribution to be this complex.
My first problem I have come across is ease of use on multiple OS's: I don't want my customers to have to deal with JRE or multiple files, I need a double click solution that will work on MAC, Windows, Linux, etc so that even complete computer newbie's can launch my software! Secondly, this is not as much a problem as something I am not sure how to do. This is including files in my software package some need to stay seperate from the program but others could be compiled, but actually I suppose this can be worked around by an installer - which would probably be easier! And finally the other proram I made is stand - alone so it can work on USB sticks (which what it was designed for), now, how do you suppose I do this so it will launch on multiple opearating systems when it's plugged in without any hasle?
Update :: Forgot to add :: My concerns about security
I have read and from personal experience I know: how easy it is to decompile a .jar, and if there not protected properly read the source code! I know about obfuscation and I know I'll have legal back up but it just worries me. Even from the point of view that user may get the wrong first impretion of my software.
So to conclude in one sentace (Please read above still):
I need to be able to let people use my software written in Java by double clicking e.g. Like something made in AutoIt - a standard application i.e *.exe
Thanks in advance
There are two routes you can take without needing any extra software involved.
The first is to just make an executable jar (Java Archive) file. Java automatically associates the .jar extension with the Java interpreter on most systems. The JAR's manifest file will tell it which class to launch when you double-click it.
The second, less recommended route, is to make a Java Web Start application, with a JNLP launcher file. The is aimed more at applications distributed from web sites.
I'll suggest the third way: write several platform-specific launch scripts for your application. For example, run.bat for Windows and run.sh for Linux. Inside every script write a command to run JRE with all the necessary parameters. You can also maintain some pre-launch checks (is JRE installed?) or some platform-specific actions in this scripts.
We run batch files on our OpenVMS Alpha and Integrity servers. Up until now they have been written in COBOL. As you can imagine there are many reasons why will not be able to maintain that process.
At the same time we have a team of developers that use Eclipse and know Java very well. Is there away to use Eclipse with OpenVMS?
Maybe it's because I don't keep up with COBOL, but I am not sure why you're convinced you have to abandon it. I realize it's not the "in" thing, but if you already have a large code base I'd think at least twice before switching to another language. If it's a lack of developers, I don't think you're going to run out that soon.
That said, googling Eclipse & OpenVMS gave this link:
http://www.sdtimes.com/SearchResult/32973
So it looks like you can still get Eclipse for OpenVMS from eCube. If I'm reading that article correctly, HP seems to want you to go the NetBeans directions. Personally, I'm still using Emacs (and not currently doing any Java), so won't make a recommendation; I just wanted to point out that there are other ways to develop Java than Eclipse.
I didn't find Java for VMS on Sun's site (someone feel free to correct me if you find it), but it looks like you can get the JDK from HP/Compaq at:
http://www.compaq.com/java/download/ovms/1.5.0/index.html
Edit: I meant, but forgot to say: Assuming you're using a JVM on the VMS side, you should be able to development with Eclipse on another platform, and copy the byte code to the Alphas.
Speaking from experience, if you do decide to rewrite your batch processes in Java I'd suggest you use a third party batching framework like Spring Batch instead of 'growing your own'.
Using a framework also constrains you to work within a standard and should provide non-functional requirements like re-runability, transactions and error handling.
We've (re)built a number of batch processes from various technologies to Java using a home-grown framework and I find we end up spending time on fixing/optimizing the framework rather than just focusing on the business logic.
Don't leave Cobol yet - call a-cobol-programmer-thinking-about-switching-to-the-modern-world and make a trade: you teach him Java, He maintains your legacy.
Shell scripts and java usually aren't a great mix. You may want to consider installing a JVM on your VMS servers, and using one of the JVM-hosted languages that handle that case better- jython, jruby, or groovy might be candidates to consider.
Eclipse relies on native Java extensions that do not appear to have been ported to OpenVMS. Don't give up though. Java runs on OpenVMS (at least 1.5 according to a Google search).
NetBeans has a Java only edition that should work on OpenVMS. On the NetBeans Download Page select the OS Independent Zip option for the platform.
Are you running the batch files on your OpenVMS system? If so, HP makes Java available for OpenVMS, not SUN; you will have to look at their site. You can develop your java code on a windows/linux machine and test it on your VMS system; you must be aware of the native extensions that you cannot use on the VMS implementation of Java.
Speaking with some experience in this area, I suggest developing with Eclipse on your Windows/Linux/Mac desktop, and pushing the code out to OpenVMS for testing/deployment. Eclipse won't run on OpenVMS because of some platform-specific components of its GUI.
Some caveats:
Make sure that you are using the same version JVM on your desktop as on OpenVMS.
The case insensitivity in OpenVMS can be a problem when using inherently case-sensitive Java .class files. Package everything in a .jar and deploy it that way.
The attributes on .jar files have to be set correctly or the OpenVMS JVM can't open them. The following command should do the trick:
SET FILE *.jar /ATTR=(RFM:STMLF,RAT:CR)
HP provides both a "fast" JVM and a "classic" JVM. Use the fast VM unless your memory needs are highly variable.
I realize this question is rather old, but I was shocked nobody mentioned this book covering Java on OpenVMS.
https://www.theminimumyouneedtoknow.com/java_book.html
What really matters when using an x86 editor on OpenVMS source is your file transfer software. OpenVMS (and many other midrange ASCII based platforms) use even though most PC developers say LineFeed Carriage Return, the data files typically store it in the other order.
You can read much more about that here:
https://www.logikalsolutions.com/wordpress/information-technology/most-text-editors-get-tabs-wrong/
Your file transfer software will need to perform text mode file transfer changing the line ending characters OR your editor needs to both use and respect the better systems line ending characters. I thought there was something in Eclipse (via plug-in) to handle this. Notepadqq claims to have something.
Note this: They use Eclipse for development, not just editing.
That means they are running and debugging in their own PC based Eclipse universe and that ain't how it's going to work on OpenVMS. They are going to need a terminal into the VMS system and it needs to be a REAL VT-100 terminal emulator, not the worthless free stuff. You can read a little bit more about that here:
https://www.logikalsolutions.com/wordpress/information-technology/diamond-edt-keypad-support/
and here
https://www.logikalsolutions.com/wordpress/information-technology/xterm-and-vt-emulation/
Depending on how old your system is, you might have Pathworks installed and running. Then a system manager can create a directory for each user that they can map as a network drive to the PC. This lets the PC user use the directory like any other network disk and it generally could be configured to handle the line ending issues with text files.
There is no way they can develop on OpenVMS using Eclipse. They can edit files then test on OpenVMS, but they cannot develop within the IDE which I suspect is what they really want to do.
The only GUI that ever existed for OpenVMS was DECWindows. You had to run it on either a VAXStation or a DS model Alpha workstation. I never heard of Eclipse being ported to it. In the latest port of OpenVMS to x86 there is no GUI. It is a server only OS.
Yeah, I spent two decades on the platform and even wrote this book for it.
Yes, there is a version of Eclipse that supports OpenVMS called NXTware Remote. It has support for Java and COBOL languages as well as Fortran, Basic and Pascal.
You can edit OpenVMS files using pretty much any editor, including Eclipse - just use Samba to make OpenVMS directories and files visible to desktops on the network. If you install Java for OpenVMS, then you've got folks using Eclipse, and compiling and running on OpenVMS.
As for ditching Cobol - why? There's still a ton of companies running it, and it will certainly last for decades more.