[io] Forum Topics

## Introduction ## If you are a Java developer coming to Kotlin, you might have wondered how to use a language construct that is similar to the try-with-resource statement in Java to automatically close Autocloseable/Closeable resources for you. Luckily, Kotlin provides the inline extension function `use()` that provides similar functionality …

## Introduction ## The `java.nio.file.Files` class includes many convenient methods to read file attributes, but sometimes these convenient methods just are not enough to meet our needs. In this tutorial, we will go over 5 ways to use the `Files` class to read file attributes so you can choose the …

## Introduction ## In this tutorial, we will focus on how to manage IO permissions to read, write, and delete local files using the `SecurityManager` class. ## Goals ## At the end of this tutorial, you would have learned: 1. What policy files are and how to use them. 2. …

Hello, I'm trying to write data to an INI file, I've got some code to read it: [http://pastebin.com/Jpwf8XJM](http://pastebin.com/Jpwf8XJM). I've tried to modify this code to get it to be able to write to INI files, but I haven't had much success. I know there are DLL's designed for this, but …

Hi Dw. I'm using this code available from [here](http://www.coderslexicon.com/using-hashes-to-check-if-a-file-changed-in-vb-net/) and I have changed it from keeping the hashs on a variable(array) to writing it on a file. Now what I want to do is to read this file. Basically I'm scanning through all my drive file and for each file …

Hi Dw. I'm trying to read a text file. This text file has a multiply lines and what I want is that I want to separate each line or should I say I want to split each line (chop it) so that I will be able to assign these fields …

Sometimes it's easier to pick an image from the internet to display in your Python Tkinter GUI toolit program.

I have recently been writing some code that asks the user questions about german. br = new BufferedReader(new FileReader("C:\\Users\\Patrick\\Desktop\\Java Workspace\\germanTool\\src\\germanTool\\lesson1.txt")); String[] engList = null; String[] deuList = null; int i = 0; while (br.readLine() != null){ lineCount++; line = br.readLine(); engList[i] = line.split("\t")[0]; deuList[i] = line.split("\t")[1]; } Using this code …

Here is simple text file example for beginners, using try..except for reading old content as it may not yet exist.

I'm having a simple i/o with file problem. I have the name coming from a string but it just wont open at all. Incoming code: string notename[] = {"NULL","empty"}; ifstream readnote; readnote.open(notename[x].c_str(),ios::in|ios::out); if(!readnote) { cout << "Read Error"; } its prolly something small but i keep getting the error, can …

int main(int argc, char** argv) { FILE *f; char string[100]; int counter=0; f=fopen("New Text Document.txt","r"); if (f==NULL) { printf("error"); } while(!feof(f)) { fscanf(f,"%c",&string); } fclose(f); for(int i=0;i<100;i++) { if (string[i]=='a') /*doesnt work, why?*/ { counter++; } } printf("\n the number of vowels a is : %d",counter); getch(); return 0; } …

Hey guys i am having a problem with displaying a single record out of a text file the code is not reaching the "if" function in the while loop of the "getRecord" Function please help. Everything else is working import java.io.*; import java.util.Scanner; import java.util.InputMismatchException; public class FileTest { //Globals …

The code sample shows how to get an image from the internet and show it in a Tkinter label widget.

Hello. I am wondering how EOFs are indicated to either the cstdio functions or the fstream functions. Mainly I am wondering how it differentiates it from data. For example, if EOF is a 2-byte code wouldn't this break the system by inserting a 'false' eof flag: for (int i=0; i<256; …

I am trying to write some code to regex search against wide strings. The problem I am having is that the regex operations ( `regex_search` in particular ) does not take in wide arguements. Here is the snippet I am having trouble with: Function Header: void scan_filesystem( wpath const& f, …

I have a bit of a baffling problem! I'm writing a tag matcher in XML and whenever I run the below procedure, I get a garbage value after the name of every tag **except for the first one**. When I add the array text to the parameters list, the garbage …

I am trying to add a comma to the end of each line ('\n') of a text file til the end of the file is reached. I am opening the file in append mode but am unsure as to how to go about identifying when the end of line is …

i would like to have the ability to tell the player they cannot go that way if the exit does not exist the rooms are in a text file that is read in, i know i should use a if function but dont know where to put it, any help …

What I am trying to do is make a program that reads a txt file and converts the number into a double array. import java.io.*; import java.util.ArrayList; import java.util.Arrays; import java.util.List; public class rocket { public static void main(String[] args) throws IOException, FileNotFoundException { System.out.println(readLines("/Users/Jeremy/Documents/workspace/altitude.txt")); } public static Double[] readLines(String …

In the main class the user enters text trying to find the file in the same directory as the source file. The string gets passed into the constructer and a file object is made but the file isn't found. The print statements are just to find out what is happening. …

I need to build a gift voucher section of my python cash register software Here's the code I have so far elif payment == '3': print "Scan or enter gift card" cardno = raw_input('Card Number: ') try: with open(cardno, '.txt') as f: pass value = f.readline() except IOError as e: …

i'm writing a text based game that creates a world based on the data inside of the specified file. however, the code i have won't let me use the function DataInputStream.ReadFully(byte[]b) Code: package textgame; import java.io.DataInputStream; import java.io.FileInputStream; import java.io.IOException; import java.util.Stack; public class world { Stack<String> LevelData = new …

I'm trying to process a list contained within a separate text file. I am able to read the file, and generate an output containing the contents of the file, but the output generated is the unprocessed version, identical to the input. I do not encounter this problem when the list …

Hello, I am having some difficulties getting my program to write the contents of an object to a file. First off, I am not sure if I should be writing the contents of the the object (e1, e2, e3) to the file or if I should be writing the contents …

Hi, I used to solve ACM problems, but I used old scanf & printf for input and output.But now i want to use C++ style IO. So, i picked a simple problem, and tried to convert its old style IO to new style IO. The problem : [URL="http://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&problem=996"]http://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&problem=996[/URL] (in summery, …

import java.io.*; public class Mac extends Laptop { public static void main(String r[]) { new Mac().crunch(); } //insert code here } class Laptop { void crunch() throws IOException { } } The question is simple. Insert a code that will make the program compile. Answers are: `void crunch()` or `void …

Will someone please tell me why I keep getting my custom file not found exception? The file is spelled correctly and is in the same directory of my java file. I am programming on Eclipse on Mac OS X. Here is my source: // Dillon Sheffield // Lab 10a // …

ok so im working on a application that displays the charges along with displaying the zip code. I seem to have a IO exception error for the console.clear() line. Is there anything else I need in order to display the charges along with zip code? Im thinking a nested if …

Im trying to take input data from a user as a string of number or letters and store each char on a different array, whats the proper syntax fro this?

Hi, this is my first post here, and I really need some help with my homework. I'm a newbie to Java programming, and I have this assignment: [I]Write an application which reads data from a file about certain items (one row - one item, stored are the integer valued code, …