We have a situation where our application needs to process a series of files and rather than perform this function synchronously, we would like to employ multi-threading to have the workload split amongst different threads. Each item of work is: 1. Open a file for read only 2. Process the data in the file 3. Write the processed data to ...
When I run a Java application that should be reading from a file in Eclipse, I get a java.io.FileNotFoundException, even though the file is in the correct directory. I can compile and run the application from the command line just fine; the problem only occurs in Eclipse, with more than one project and application. Is there a setting I...
Hi guys, need your help. I actually don't know how to extract dates from a arff-file. arff-file: @ATTRIBUTE a1 NUMERIC @ATTRIBUTE a2 NUMERIC @ATTRIBUTE a3 {a,b,c,d,e} @DATA 12.5,1,b 3.7,2,a 3.5,1,c ... do C have BufferedReader and InputStreams? Thanks a lot! ...
I'm working with a file with about 2G. I want to read the file line by line to find some specific terms. Whitch class can I better use: FileReader or FileInputStream? And how can I find the specific words efficiently. I'm just using the split() method, but may be can I use the java.util.regex.Pattern class in combination with java.util.r...
Can you get the binary data from a file without the fileReader class? I'm trying to upload files and I have it working in firefox & chrome/webkit but safari 5 doesn't have filereader. There has to be a way to get the binary data as gmail has drag and drop that works in safari 5. ...
I have a text file in my res/raw directory. I want to read the file line by line, but FileReader and BufferedReader fail, because of Android's security restriction. How else can I do it? ...
Hi I have 40 MB file in server and i am downloading my file using HttpURLConnection c = (HttpURLConnection) u.openConnection(); c.setRequestMethod("GET"); c.setDoOutput(true); c.connect(); FileOutputStream f = new FileOutputStream(new File("trips.xml")); InputStream in = c.getInputStream(); byte[] buffer = new byte[1024]; in...
I'm trying to write a method to take a multiline tab-delimited file and return the contents of that file as an arraylist of String arrays (each line is a String[], and each such String[] is an element of an arraylist). My problem is, I can't tell if the output is correct or not. I've printed each arraylist element and String[] element as...
Hi, I've tried using the FileReader class but it only seems to allow access to files outside the app bundle -i.e. the documents folder. But I want to read files within the app bundle - for example obtaining global settings from Phonegap.plist, working out if certain files exist in the www folder and so on. I have tried a few things but...
One of the lines in a java file I'm trying to understand is as below. return new Scanner(file).useDelimiter("\\Z").next(); The file is expected to return upto "The end of the input but for the final terminator, if any" as per java.util.regex.Pattern documentation. But what happens is it returns only the first 1024 characters from the...
Hello all- I'm trying to pull the contents of a file using only its filename (ex- file.txt). The catch is I'm doing it via a Java.awt swing applet, and the user has to input the file name into a text box. The idea is this: Client applet has a JTextField and JTextArea The User client side types in the name of a file hosted on the "serv...
I am trying to use a file reader and buffered reader in java to print a certain a certain number of lines from a txt file. The file has over 100000 lines, but i just want to print the first 100. The code i have come up with looks like this: public class main { public static void main(String args[]) throws Exception { FileRe...
For storing data offline WebApp can use: session storage, "advanced version of cookies" key/value based Web Storage (AKA local/global/offline/DOM storage) sql-based Web SQL Database and Indexed Database API FileReader and FileWriter API (requires user to select files each time the application loads) But apparently there is no File St...
I'm trying to unpack a binary string sent via Javascript's FileReader readAsBinaryString method in my python app. It seems I could use the struct module for this. I'm unsure what to provide as as the format for the unpack exactly. Can someone confirm this is the right approach, and if so, what format I should specify? According to th...
Is there some offset I should be accounting for when I upload an image in this manner? If i simple send the file, I can write it back out as a valid JPG but if I write the data submitted via readAsBinaryString, the file is approximately 50% larger and corrupt. Any thoughts? here's the javascript: var file = e.dataTransfer.files[0]; ...
I want to read in a grid of numbers (n*n) from a file and copy them into a multidimensional array, one int at a time. I have the code to read in the file and print it out, but dont know how to take each int. I think i need to splitstring method and a blank delimiter "" in order to take every charcter, but after that im not sure. I would ...