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Questions tagged [filewriter]

Java built-in class that allows writing character files.

Public class FileWriter extends OutputStreamWriter.

Convenience class for writing character files. The constructors of this class assume that the default character encoding and the default byte-buffer size are acceptable. To specify these values yourself, construct an OutputStreamWriter on a FileOutputStream.

Whether or not a file is available or may be created depends upon the underlying platform. Some platforms, in particular, allow a file to be opened for writing by only one FileWriter (or other file-writing object) at a time. In such situations the constructors in this class will fail if the file involved is already open.

FileWriter is meant for writing streams of characters. For writing streams of raw bytes, consider using a FileOutputStream.

Since: JDK1.1

Source: Oracle

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how to check file is exist or not in mobile sd card using javascript

How do I check if an Excel file (.xlsx) exists on the SD card on Android using PhoneGap? If the file exits, how do I then import and export the file contents through javascript?
Pavan Alapati
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Using FileWriter variable as a parameter for a method

I am trying to create a program that takes user input and enters it into a file. I want one part to set everything up and a method to actually log everything. I run into an issue when I try to user FileWriter writer as a parameter. It gives me…
Josiah L.
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Android: Write file from other class nullpointerexception

I'm trying to write a file from another class, but I get a nullpointerexception that I can not solve. The following code can be used in the mainactivity without any problems, but when I try to use it in my second class, I get the error. public void…
Jullix993
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Reading a string below a string from a file

For example, I were to save contact details on a .txt file and after that is saved, I would want to view the contact details of the person only by entering the name. For example, if I were to have a .txt file containing these strings, Name:…
Rod Galangco
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write csv file line by line using string in java

I had a modify my original csv. now I want modified csv file whether it is generate new csv file or updated on it ...how could it possible? I had a extract a single column values of csv and incremented by 1. now I want csv file with modified data.…
vivek patel
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Data abruptly stops writing into a csv file from Dynamo DB

I have loaded a dataset to Dynamo DB successfully. I then want to read the data from the dynamo DB and load into a .csv file. Use this file by weka to develop the clusters. Unfortunately, only few data is read from the dynamo DB are loaded into the…
kirti
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How does a resource leak actually take place?

It is advised that one should always close a Reader or a Writer in order to prevent serious resource leaks. But how does it actually take place? Any code examples would be greatly appreciated.
Daman Arora
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How do write into a text file, without the lines connecting after you increase the file size?-Java

I am using BufferedWriter to write text into a notepad.txt file. The program writes the text with a new line for every sentence, but when I increase the size of notepad, all the lines connect to each other. How do I stop that from happening? …
danny
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Java FileWriter not actually changing file at all

I have been looking for the past hour or so trying to find the reason for this, but have found nothing. It is a very small text file (only 4 characters at most), thus the reason I did not bother with a BufferedReader or BufferedWriter. The problem…
Samboni
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How to Read an Integer from a Created File?

public static void main(String[] args) { ReadInts ri = new ReadInts("mydata.dat"); } I've recently created a file called mydata.dat What is the easiest way to call a data from the file using the Constructor, class and leaving the main…
user3788930
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Rewriting specific Strings within a text file and appending the rest

I'm trying to append an array of strings onto my text file but I also want to rewrite the first line each time too. This is how I save my text (I attempted to append): public static void saveText (String[] studentArray, String assignArray [],…
Milo
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How to write text to a file in Java

I'm new to java and currently trying to write some strings into a text file using this tut : http://www.homeandlearn.co.uk/java/write_to_textfile.html so here is my code : public void savefile() throws IOException { …
Jafar Akhondali
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Reading data from multiple files and writing the data to a new file giving unexpected result?

I've split a mp3 file of 10 MB size into 10 parts of 1 MB each in mp3 format on my Android device, each file plays successfully by the player but while reading the data of all the 10 files and writing it to a single file the total size of the new…
CodeWarrior
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Console write in file issue

This is my function to write in file : FileStream file = new FileStream ("c:/Redirect.txt", FileMode.OpenOrCreate, FileAccess.Write); public void writeFile(string line, FileStream file) { StreamWriter writer; TextWriter oldOut =…
Chlebta
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Using PrintWriter to extract Google analytics data to CSV file

Hello all i am trying to use the printwriter to extract data from google analytics via JAVA original code private static void printGaData(GaData results) { //csv printer PrintWriter pw = null; try { pw = new PrintWriter(new…
zomdar
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