I have created a java gui application and I need to communicate through the serial port. I would like to open the serial port in the beginning of the application and then close it when the applications closes. The problem that I am having is that I created a method to open the serial port in the main function but I can not close the serial port on exit off the application. Is there away of having the serial port be setup so that all methods can access the serial port.
My company is a transport company. We receive goods form partner and transport it to customers. There is a process that we must accept a number of kilograms into bill after we weigh goods by the electronic balance(the electronic balance have serial port plug in PC) . To decrease this process, I'm looking for a project "read serial port wrote in java applet". Who have code,
I want to write a program that accepts user input and then prints its average in a serial way.
Suppose i enter 5. I should get result 5 first time then i input 10 then it should return the average of (5 and 10) and then i enter say 20 it should return average of (5,10 and 20) and so on.
**Getting data on from rfid scanner as Serial rs232 port in JFrame**, in this case I have made a JFrame form and I have a JTextField for storing data rfid as a String. Actually, I found a class from internet that read the RFID reader as byte, now How To get data from my RFID Class to my JTextfield Jframe in my main class as String?
displaying COM port in Combo box , see my code below , it does not show any error but it does not show COM port in combo box , instead it shows the class name of Communicator with some garbage data .
I'm a new in java program. I need reading COM port on GPRS Modem. I plug the GPRS Modem in my PC and it has connected. I use Eclipse and create a project and new a file a.java, i collect this following code from the internet and paste it into the a.java file.
Java Code:
package serial; import java.io.*; import java.util.*; import javax.comm.*; //for accessing serialport public class OwnPort { static CommPortIdentifier portId;
[Code] ....
You can see the result here
I don't know the result why return " Set default port to COM4. port COM4 not found."
I am trying to connect to Sql Server database using Oracle UCP with sqljdbc4-3.0 JDBC driver for Sql Server,with different ports and instances.
– the issue is with the port being ignored in the server string.
For example, using port 1440 connects to the default instance (which is on port 1433) rather than MSSQLINSTANCE1 which is on 1440.
Below are Server hosts used.
sql005.sqlasoftware.com (connects correctly to the default instance) sql005.sqlasoftware.com:1440 (connects incorrectly to the default instance on port 1433) sql005.sqlasoftware.comMSSQLINSTANCE1 (connects correctly to the named instance)
I've been working on this code since a couple days and I just can't find what's wrong here. I have make an image open when the JMenu m6 button is clicked but it just doesn't work. I've tried a bunch of different codes but when I click on the desired button, nothing happens. Here's the code :
I'm now working more and more on the go and although I can carry my Macbook Air without too much trouble I've just been given an iPad Mini by work and it's far easier to do what I do with that on the move.
For work I need to open around 35 different websites at one time 4/5 times a day on the move.
With my Macbook that's no issue, as I can just use the open all function of my bookmarks, but on the iPad there is nothing that will allow me to do this.
I have looked online and a few people have had this issue and fixed it using the below Java method:
Creating a link that when clicked sets off a Javascript function that contains several window.open("url"); Clicking the link opens each website in its own tab.
I want to get the time elapsed while opening a pdf file . I am not able to find a way to do it using PDFBox, Is there any way using which I can create a PDDocument in my java program and use some API to launch the PDF file and measure the time elapsed in opening it.
I need to port asynchronous bean (provided by websphere) support in App servers like weblogic and jboss. Is this feature already part of J2EE specification? Or should I use some other external package to get this feature?If so what are those async bean like features for weblogic and jboss?
We are creating a quiz as a school program, we are using netbeans and we have a little problem. The problem is that our JButton opens a new JFrame in a new window and we want it to stay in the same window. The code we are using is:
private void PlayButtonActionPerformed(java.awt.event.ActionEve nt evt) { Question1 s = new Question1 (); s.setVisible(true); }
Is it possible to make it stay in the same window?
I want to create a program which contains a list with 5 items and a button on the first display. The desired option is chosen from from the list and the button is pressed. On pressing the button it must open a new form which corresponds to the chosen item from the list.
My program has just "File" and "Help" in the menubar when "File" is clicked, there is an exit item that closes when clicked.i want the "About" item in "Help" to open a new window, what's wrong with my code?here is it:
I'm going through a file (MySQL dump) and I wish to take the SQL and create individual files for each table (as opposed to what I do now, which is just run through the whole thing).
Now, this all works fine - but what I want to do is create a separate .sql file for each table.
However, I can't figure out the best way to do this - how do I create a new FileWriter (or instance of whatever class is required) as I'm going through the while loop? That or pointing the same one to different files as I go through the loop.
It can be assumed that the file may exceed RAM - I want to do it line by line rather than slurping the entire file as a string and "cheating" that way.
There appear to be many (a bewildering amount of) I/O options and I'm just unsure.
A wages calculator application is required that can determine the total cost of crew departing from the port on that day. To do this, the application reads from an itinerary text file containing each ship being loaded in the port that day, in the following format:
<ship id> <journey id> <l> // where <l> is the length in hours of the journey <s> // where <s> is the number of crew for the ship for this journey <rate> // for each s, <rate> is hourly rate of pay
Your application must calculate the total cost of the crew for each ship/journey and then compare it with a "recommended maximum journey cost" (RM) amount typed in by the user when the application is first run. If the total amount is less than or equal to RM then the details must be written to the screen and to an output text file called wagedaily.txt. If the amount is larger than RM then the results must be written to the screen only. Messages to the screen must indicate whether the crew cost is less than, equal to or larger than RM.
Your application should find the ship with the highest crew cost that is below RM and print this out as the final piece of output to the screen.
It has given me a bunch of ships and numbers to play around with in the code, here they are:
