[threads] Forum Topics

I wanted to upload an excel file with one of my threads, but it is refused. Do I have to zip it first and if so, why?

I was following along to the following tutorial - [Derek Banas Java tutorial 18 - Threads pt2](http://www.youtube.com/watch?v=G2Xd5avyk_0) and as I decided to go over his tutorial series by following along in notepad++ and compiling with the command line, so that I can experiment and test things I'm unsure about, I …

One thread increases an integer named "counter" , and another decreases the same integer. Using synchronized statement on LockObject to control access to counter. If i understand correctly i have to use an Object reference. Can i use synchronized statement on counter somehow? public class Synchronized_Block_Demo { public static int …

Hi, I have a working program and I need to answer the following questions: 1:where was polymorphism was used in this application? 2:identify where overriding or overloading was used in this application? I belive overriding is used by the Runnable method to override the run() method. Would that be a …

I see this example frequently and thought I'd give it a shot but I've got something unexpected happening with my Queue. I have multiple threads utilizing my producer class but the output doesn't show that it is being written to by each thread. protected Queue<ProductMessage> prodQueue = new ConcurrentLinkedQueue<>(); @Override …

hi, for program to be concurrent i created 4 threads as below Thread th1 = new Thread(a1.run); Thread th2 = new Thread(b1.run); Thread th3 = new Thread(c1.run); Thread th4 = new Thread(d1.run ); th1.Start(); th2.Start(); th3.Start(); th4.Start(); how do i know when the threads are finised done with the work, …

Here when I execute the program, the output I'm getting on all the tries is 342 (naturally first 34 prints together then 2 seconds later 2 prints). My doubts is that is the order of start() [x.start() followed by y.start()] important in order of execution? Shouldn't the output be 234? …

Two doubts: 1. Placing run() inside main() generates "illegal start of expression error"? So why can't run() be placed inside main()? 2.With the above code I am getting the output as A C D B. Why B comes last is because of join(). But what I'm unable to understand is …

I Have This Workers List: private List<Worker> buildWorkerList( Producer producer ) { List<Worker> workerList = new ArrayList<Worker>( 11 ); workerList.add( new WorkerImpl( "Garnett", producer ) ); workerList.add( new WorkerImpl( "Durant", producer ) ); workerList.add( new WorkerImpl( "Xavier", producer ) ); workerList.add( new WorkerImpl( "Daniel", producer ) ); workerList.add( new WorkerImpl( …

I am in the process of creating a jackpot game. At the moment I am stuck trying to cycle through the different pictures and stop on a random picture for 5 different slots. So far I have this for animating: private void animatePictures() { Thread timer = new Thread() { …

how many stacks does the kernel maintain/keep track of...say if there are 12 kernel threads and around 50 user processes??

My web application has the ability to process data from word docs and PDF files. We recently had a client who attempted to run files that are of a significantly larger size than anything we tested with. 50MB-500MB PDFs compared to our test files of 1MB-30MB files. If they don't …

Hi! how to delete threads on daniweb.com posted by me ?

I'm making my first program that is using threads...the problem is that when I click the button that I created in windows form it never goes to the button click event in the debuger!!! I've read that that those threads should be background so i made like this [CODE]Thread sendcon …

My program talks to a USB device over a serial connection. I have WMI ManagementEventWatchers watching for the device to be plugged in and unplugged. If I try to enable, disable, or change anything about the GUI from the event handlers for the WMI Events, I get a InvalidOperationException because …

I'm trying to run audio in a different thread but I have no idea why but when I call wait(), my entire program seems to wait or hang.. not sure if it's deadlock since all it does is wait(), though if I set a time period, after that period it'll …

Hi All, this is my first query after joining the forum. I would like to know following points: 1. If I can create threads in constructor 2. If yes, can I use the same object / instance (which created this thread)in this thread to call other methods of the class …

Hi, I've been trying to capture video from webcam using openCV functions and openGL for rendering. The code is working fine and I can acquire and display both the cameras. Now I'm trying to record the captured video's and saving them to a file using openCV createvideowriter object. I can …

Ok, so I wrote a very simple programme, just to practice multithreading. I know it can be coded better, but I'm still learning about this, so please be lenient. This is my code so far: [CODE]package threads; // Create a thread import java.io.File; class threads implements Runnable { // This …

Hello, This is my first post to the community. I have never really been one to ask of much help but I am stumped. I was asked to asked to write a word count program that received input from a scanner object. The input could consist of one or more …

Hi, I am running 3 threads that each start an ffmpeg process to extract 3 snapshots form a video file. I need to be able to call this method multiple times, with different video files. It writes the three snapshots to the system. However If I try to delete these …

Hello everyone, I have installed Dev-C++ IDE on my system to run POSIX threads application. The program has compiled correctly. When I try to run the application, I am encountered with the following error Unable to locate component This application has failed to start because pthreadGC2.dll was not found. Re-installing …