I am working on development of a POS. there is a requirement which to display total amount in the pole customer display(Posiflex PD/2608/UE) using java.
I was referring to many solutions of Stack over flow but I could not find what i want.
Here is what I exactly want .
I need to send ,and clear text to Posiflex PD/2608/UE pole display using JPOS libraries or any other way using java. If any one can give me the code example or proper reference
You could be more lucky if you tag your question as javapos, that's the correct project tag, jpos is mainly for iso8583 development, it does not address the end point hardware.
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I am currently implementing a web app with the goal of keeping track of the location of all the packages in a company I am working for. Our plan is to have a barcode for each package and scan that barcode at the different sectors of the company, indicating where they are. The problem is that I have no idea where to start. I've done some research on Google but haven't found much. My main questions are:
How do barcodes work in the first place?
How do you program with barcodes? Is there a specific language I should use? Do I have to buy anything?
How do you read barcodes and enter them in your program and how do you generate them in the first place?
Any hints on how I should proceed with my implementation?
I look forward to hearing back from you as I need to implement this as soon as possible.
This is a pretty broad question, but I'll do my best to answer:
How do barcodes work in the first place?
Essentially, for this type of project, you can think of the barcodes you're going to be implementing as merely serial numbers. If you really want to know how barcodes work, Wikipedia has a pretty good write up - but essentially, at this level, just think of them as a serial number, encoded in such a way that a machine can read it.
In your web app, you'd be taking a number (say, 42) that has no meaning on its own, and associating with a package and a location.
How do you program with barcodes? Is there a specific language I should use? Do I have to buy anything?
You don't really "program" with barcodes per se... Again, it's just a machine readable implementation of some kind of information. In terms of "specific language", just build your web app as you already are, and add, say, an extra integer field. The integer doesn't mean anything on it's own - it's just going to be what's printed in the barcode. In this use case, you don't even have to have a barcode per se - you could just write it on the box! The usefulness of barcodes comes in speed and accuracy of data entry - you'd be having a computer device scan the barcode and type it in instead of a human.
How do you read barcodes and enter them in your program and how do you generate them in the first place?
It doesn't sound like you're at the point where you're doing any kind of machine vision or anything, so the most common entry method would be to buy a basic USB barcode scanner, like a Symbol LS2208. Use the manual that comes with it (or you can download the manual) to configure it as a keyboard emulation device - that way, your user would just select a field in the web app, scan, and the scanner would type out whatever was stored in the barcode (in the example above, the number 42).
As far as generating, depending on your volume, you have lots of options. For low volumes, you can find a generator online and print them out onto Avery label-type sheets using an inkjet or laser printer. You could also find a barcode font and print right from, say, Word, onto a label sheet. For higher volumes, you could purchase specialized software and use a label printer, or you can even write this yourself. Personally, I have a Zebra LP2844 with a network interface, and I wrote some custom PHP to send commands in the printer's native language (EPL2) over a socket to print onto roll labels.
EDIT: You'd probably want to use either Code128 or Code39. These are two different "symbologies" (types of barcode) that are appropriate for what it sounds like you're doing. They're 1-dimensional (like UPC codes and not like QR codes), so a cheap reader can decode them, and they're pretty flexible and VERY common.
Any hints on how I should proceed with my implementation?
Just think of barcodes, the way that it sounds like you want to use them, as arbitrary serial numbers that don't mean anything on their own. For example, doing this sort of box tracking in a previous warehouse environment, we printed THOUSANDS of unique serial numbered barcode labels. Those labels didn't have ANY value until they were attached to a box and a picker started to put stuff into that box. They were just numbers. Just remember to keep them unique.
I'am developing a server for a GPS Tracker that can send pictures taken by a camera connected to it, inside a vehicle.
The problem is that I follow every step in the manual and I can't still decode the bytes sent by the tracker into a picture:
I receive the picture in packages separated by the headers and "tails", each one. When I receive the bytes I convert them into hexadecimals as the manual expecifies, then I have to remove the headers and "tails" and apparently after joinned the remain data and saved as a .jpeg, the image should appear, but it doesn't.
the company name is "Toplovo" from China. Have anyone else solve something similar?
Are the line feeds part of your actual data? Because if so I doubt that's supposed to happen.
Otherwise, make sure you're writing the file in binary mode. In some languages this matters. You didn't really specify, but make sure you're not in text mode. Also make sure you're not using any datatypes unsuited for hexidecimal values (again, we don't even know what language you're using, so, it's kind of hard to give specific suggestions.)
I'm pretty much a noob. I've been wondering how mobile barcode readers worked. I've seen several apps on the market that would let you scan a barcode, and then show you corresponding product data.
I was wondering where the product data typically comes from. Is it usually from a built-in database, or do apps tend to connect to a server to access a database?
Thanks for any and all assistance!
Barcode readers/scanners work by using some sort of standard format to communicate data to the device 'reading' the code. There are typically two types of 'barcodes' used today:
The standard Barcode - often referred to as a UPS code
And the QR code - popular for cell-phone apps.
From a developer's standpoint, both work the same way:
A device 'reads' the code, the code is interpreted to represent a set of numbers (typical of the standard Barcode), or numbers and characters (QR code).
The interpreted code is used to seek the related data in a database somewhere - A UPC code would have a database of items referenced with a number (just like the number you would read at the bottom of a UPC label), and a QR code frequently references a URL that can be opened in any web browser.
The information from a barcode comes from the referenced data that the barcode points to - so you don't have to carry around a database of information anytime you want to scan a code - you just have to be able to connect to that source of information.
Hope this helps.
I have a very specific problem: I want to write my own DMX-Software to control our DMX-fixtures. Does anyone know a interface to use? It would be great if there would be any Framework for using it, so that I only have to sent the channel and the value to the interface.
I noticed your question was for Mac, but I wrote a Windows specific C++ program, which could probably be easily modified. It's adapted from the C# example on Enttec's OpenUSB website. See:
https://github.com/chloelle/DMX_CPP
There's some really good information & code samples (including a working class that I wrote) here: Lighting USB OpenDMX FTD2XX DMXking
Ultimately, you end up setting byte values (between 0 and 255[FF] (brightest) in a byte array.
It's fairly trivial to implement simple effects such as fades or chases.
You would need to use a USB controller to convert your program's instructions to the actual hardware.
I suggest using a simple iphone application talking to a webservice which then interacts with the hardware.
Code samples above are in c# though will show you how to interact with a DMX controller
My first question =). I'm writing a video game with a user interface written in JavaFx. The behavior is correct, but I'm having performance problems. I'm trying to figure out how to figure out what is queuing up the refreshes which are slowing down the app.
I've got a relatively complex Scene Graph that represents a hexagonal map. It scales so that you could have 100 or a 1000 hexagons in the map. As the number of hexagons grow the responsiveness of the gui decreases. I've used YourKit (a Java Profiler) to trace these delays to major redraw operations.
I've spent most of the night trying to figure out how to do two things and understand one thing:
1) Cause a CustomNode to print something to the console whenever it is painted. This would help me identify exactly when these paints are being queued.
2) Identify when a CustomNode is put on the repaint queued.
If I answered 1 and 2, I might be able to figure out what it is that is binding all these different nodes together. Is it possible that JavaFX only works through global refreshes (doubtful)?
JavaFX script is a powerful UI language but certain practices will kill performance. Best performance generally boils down to:
keeping the Scene Graph small
keeping use of bind to a minimum (you can look at using triggers instead which are more performant)
This blog post by Jim Weaver expands these points.
I'm not sure as to the specific answers to your questions. If you examine the 1.2.1 docs you might be able to find a point in the Node documentation that you can override and add println statements but I'm not sure it can be done. You could try posting on forums.sun.com
This is a partial post. I expect to expand it after I've done some more work. I wanted to put in what I've done to date so I don't forget.
I realized that I'd need to get my IDE running with a full compliment of the JavaFx 1.2 source. This would allow me to put break points into the core code to figure out what is going on. I decided to do this configuration on Eclipse for remote debugging. I'm developing my FX in Netbeans but am more comfortable with Eclipse so that's what I want to debug in if I can.
To get this info into Eclipse, I first made a project with the Java source that my code uses. I then added external Jars to the project. On my Mac, the Jars I linked to were in /Library/Frameworks/JavaFX.framework/Versions/1.2
Then I went searching for the Source to link to these Jars. Unfortunately, it's not available. I could find some of it in /Library/Frameworks/JavaFX.framework/Versions/1.2/src.zip.
I did some research and found that the only available option left was to install a Java Decompilier. I used this one because it was easy to install into Eclipse 3.4: http colon_ //java dot decompiler _dot free.fr/ (<-- Please forgive the psudo link, I'm limited because I'm new)
This is where I am now. I can navigate into the Core FX classes and believe I'll be able to set break points and begin real analysis. I'll update this post as I progress.
I found a helpful benchmarking tool:
If you run with the JVM arg:
-Djava.util.logging.config.file=/path/to/logging/file/logging.properties
And you've put the following args into the file referenced by that arg:
handlers = java.util.logging.ConsoleHandler
java.util.logging.ConsoleHandler.level = ALL
java.util.logging.ConsoleHandler.formatter = java.util.logging.SimpleFormatter
com.sun.scenario.animation.fps.level = ALL
You'll get console output that includes your frame count per second. For FX 1.2 it wasn't working for me, but it appears to be working for 1.2.1 (which was released Sept. 9, 2009.) I don't have a Netbeans that runs 1.2.1 yet.
You may want to read this article.
http://fxexperience.com/2009/09/performance-improving-insertion-times/
Basically, insertions in to the scenegraph are slow and benefits can be seen by batching up inserts