Software Development Forum

So, I made a simple server-client chat program, but I have a problem: if the server tries to message the client, the server lags or freezes a bit, same with the client. is there something that I do wrong? import java.io.DataInputStream; import java.io.DataOutputStream; import java.io.IOException; import java.net.ServerSocket; import java.net.Socket; import …

Through Web Search I found [this link](https://www.daniweb.com/posts/jump/1740388) but I want to know is there a way to do it so the sub items in the dropdown would be colored?

So I am making a responsive audio waveform, if you don't know what that is, it is something like this: (btw this is my goal to make those audio waveforms). https://i.ytimg.com/vi/J7uN-SQtOYI/maxresdefault.jpg https://www.youtube.com/watch?v=OVMuwa-HRCQ https://www.youtube.com/watch?v=SCD2tB1qILc I don't know how to describe it, so just look at the videos and image. but my …

Hii Guys I am currently Devloping a Java Remote Desktop Software like teamviewer I would like know some guidelines about the tools I can use for client and server side I could create a GUI using Swing and add by using Robot class to imitate mouseactions and keyactions and by …

hello dear community, first of all - i hope that my beginner-question will fit into this sub-forum.  I hope so.  Servo Control  with Micropython - with the ESP 8266 ...- compared to Arduino  I work with young kids and I'm always looking for economical platforms to build intriguing projects. While …

I created a simple Point of Sale program without database in Visual Studio 2008 (VB.NET) and I want to output the number of money bills that are needed to complete the change of the customer This is the preview of my program - https://ibb.co/R94400g In the image, at the bottom …

I have an issue when building for iOS in Xamarin Studio: I open Xamarin Studio and create a Single Project View App for IOS, I then run the project, but the project does not load onto the simulator all I get is the message "Waiting for the debugger to connect …

Hi there I’m learning vb.net and my main outcome is to be able to find out how to create from scratch custom GUI controls like 7 Segment displays in vb.net mind you and once I have accomplished that to be able to connect the hardware to a serial port like …

I am making a program, and I don't know why my program becomes unresponsive, when I click the button ): I have a feeling its because of this: "connection = server.accept();" I don't know how to fix it. I am trying to recreate this: https://stackoverflow.com/questions/18505123/how-to-use-client-chat-on-different-pc but in javafx. package yeetYeet; …

Hi developers! I have made a POS software. I have added the functionality of "priniting to Thermal printer" and "barcodes". Firstly I added the functionality of Reciept printing which worked perfectly. Then I added the functionality of barcode scanning. As you know barcode reader device automatically scans the barcode and …

I've problem about using Genymotion Android emulator for xamarin development. I have intalled Genymotion desktop app and several Android devices within it. Whenever i run any of the installed device in Genymotion desktop app via start button, it works fine but there is no Genymotion emulator in the list of …

hi, I have a vb program that wants to retrieve data from MySQL dbase. this code is working fine : Dim vDATE As String vDATE = mDATE.ToString("yyyy/MM/dd", System.Globalization.CultureInfo.InvariantCulture) Dim connstring As String = "server=xxx.xxx.x.xx;database=dbname;uid=idko;Pwd=passko" Using con As New MySqlConnection(connstring) con.Open() Dim query As String = "SELECT issue_date, inc_date, exp_date, total …

Hello Everyone. I am trying to create a code to decode an PostScript RLE image and save it. However, my output is always invalid (the raw image). I try to open it on photoshop but its always an invalid image or something like that. I've wrote at least three versions …

Hi developers! I have made a POS software. I have added the functionality of "priniting to Thermal printer" and "barcodes". Firstly I added the functionality of Reciept printing which worked perfectly. Then I added the functionality of barcode scanning. As you know barcode reader device automatically scans the barcode and …

When we build an application, which layer should we start with? From top (UI) to bottom(Data Layer) or bottom to top?

I have been wrestling with this for two days now and getting nowhere. Something is broken, either the GridSizer control or me. I'm hoping it's me and someone can show me the problem. I've stripped my app of non-essentials. What I am building is a Sudoku app which consists of …

Can anyone help me with this: I made a program where the user will choose a product from a menu and i want after the products that the user chosen will be output also below where there is like a "receipt-like" or a summary of what the user bought. I …

[B]I've highlighted the code in question in red. Can somebody tell me how the red code makes Pac man and the Ghosts move?[/B] [code]// // PacMan // Another 1 day game (created in 5 hours). // // (C)2000 // Brian Postma // [email]b.postma@hetnet.nl[/email] // [url]http://www.homepages.hetnet.nl/~brianpostma[/url] // import java.awt.*; import java.applet.Applet; …

Hello, I have a ComboBox in my WinForm which has data from SQL server (used LINQ to bring up the data). I'd like to have an option just like AutoComplete in VB.NET but not only by the first letter but for a search LIKE. For Example: My ComboBox has there …

I have looked on the web for a solution to print scrollable panel larger than can be fitted on the screen but couldn't find any solution and it looks like that many people has this problem! PrintForm (printform powerpack component) can not do this because it only capture that part …

Hello all, I've actually seen a few posts floating around the web (most of which are rather old and none of which were solved) about the same question that I'm having which is this: I have a combobox that is populated with movies with a number corresponding to where it …

I need an answer for this question ( write 2 program that takes grade as input and display the range of marks use the select case and if() A. 90 to 100 B+ 80 to 89 B. 70 to 79 C 60 to 69 D 50 to 50 F. F

I have an assignment to create a card game that compares to dealt cards between players to see who has the highest valued card. It must first be determined by the cards value, then only if it is tied, the suits value. The code below is what I have so …

My program fail to generate the auto ID on my text can help me. Private Sub getNextNumber() If Not app.State = ConnectionState.Open Then 'open connection app.Open() End If Dim da As New OleDb.OleDbDataAdapter("select top 1 ID from ADMIN ORDER BY ID desc;", app) Dim dt As New DataTable 'fill data …

Hi guys, as part of an exercise I was involved with, I had to use the factory pattern to create a series of different objects, however I'd like to keep a list or map for what it matters of these objects and I'm getting a bit into troubles here. So …

I got this assignment and I'm stuck. I have to write a function that takes an integer value and returns the number with its digits reversed. For example, given the number 7631, the function should return 1367. Can someone help? :confused:

Hi guys, Am developing a clinical management system in VB.net and using Microsoft Access for the database. Everything else is working very well. But the login code is not working. It's throing an error message "Object reference not set to an instance of an object" on line 12. Below is …

hello, i recently joined the USACO's training gateway [url]http://ace.delos.com/usacogate[/url] I made the first problem([URL="http://ace.delos.com/usacoprob2?a=n4y3olVXOJ9&S=ride"]http://ace.delos.com/usacoprob2?a=n4y3olVXOJ9&S=ride[/URL]) and it ran successfully in my dev-cpp compiler. but the online grader threw some runtime error. it was like [COLOR="Red"]Compiling... Compile: OK Executing... > Run 1: Execution error: Your program (`ride') exited with signal #6 (abort()). …

Above program takes input of coefficient and power separately of 2 different polynomials add them up to a new polynomial.It is successfully compiled and executed in DEV CPP as C file.It Turbo C compiler add void before main function to avoid warning messages.

In mysql database i created "leave" table: CREATE TABLE `leave` ( `ID_LEAVE` int(11) NOT NULL, `ID_WORKER` int(11) NOT NULL, `BEGIN_DATE` datetime DEFAULT NULL, `END_DATE` datetime DEFAULT NULL ); INSERT INTO `leave` (`ID_LEAVE`, `ID_WORKER`, `BEGIN_DATE`, `END_DATE`) VALUES (1, 26, '2019-03-19 07:00:00', '2019-03-19 15:00:00'), (6, 26, '2019-03-22 07:00:00', '2019-03-25 15:00:00'); "Sickness" table: …