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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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Use FileWriter to write text on begin

Hy, I am using FileWriter to write some text on SD Card, like so FileWriter write = new FileWriter(Environment.getExternalStorageDirectory().toString() + "text.txt", true); write.append("This is first written"); write.close(); Now when i write some…
gabskoro
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Java text file size (before file is closed)

I am collecting full HTML from a service that provides access to a very large collection of blogs and news websites. I am checking the HTML as it comes (in real-time) to see if it contains some keywords. If it contains one of the keywords, I am…
Andrew
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Writing multiline JTextArea to txt file

so I Have a JTextArea for user input and then when they click a button it writes it to a text file, I have both setLineWrap and setWrapStyleWord set to true for the JTextArea. I would like to write to the text file the exact way it appears in the…
Beef
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New line writing to a file

I am trying to write to a file the log of my application. I have created an method which appends a line to the end of the line. public static void write2Log(String s){ StringBuilder contents = new StringBuilder(); File root =…
Dayerman
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use BufferedWriter to write same data to multiple files

I'm interested in writing some data I'm receiving into two different files (same data). In my code, I'm using BufferedWriter and FileWriter to write the data to files, and I want, as a backup, to write the same data on the local storage and on the…
Geeky bean
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What do I need to close when using PrintWriter in Java

When using a PrintWriter like this : PrintWriter fileOut = new PrintWriter(new BufferedWriter(new FileWriter(csvFileIn))); What do I need to close in the finally block ? The PrintWriter, the BufferedWriter and the FileWriter ? Do I need to try…
JavaDev
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Remove hardcoded file path from java program

I have created a simple java program in which I create a text file and read the data written in it. The problem is that I don't want to hardcode the path of the file because after developing the application I created a installer package for my…
Shantanu Nandan
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File Not Found Exception using Java FileWriter

I am trying to write to a txt file from a JAVA Application. I have tried using Buffered Writer, then just FileWriter to create a new file within a potentially new (not indefinitely since more files with different names will be later programatically…
Alexis R Devitre
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Does java.io.FileWriter buffer bytes before writing to the output stream

As per java docs, In general, a Writer sends its output immediately to the underlying character or byte stream. Unless prompt output is required, it is advisable to wrap a BufferedWriter around any Writer whose write() operations may be…
Kumaran
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How to set the directory when saving file with filewriter in java?

Hi I'm using NetBeans for more easy-to-use GUI. I'm trying to save a txt file which I get the name from the user, using the FileWriter, (not using serializable) I think I could set the saving location of the file using the Serializable (I'm not…
Paul K
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what exactly the fileWriter works in javascript

I use HTML5's filesystem feature in my project. And try to write text append to a file continuously by using for-loop. But actually it just effect one write which is the last write, even though I got 5 "Write completed."(That should means it success…
xsuii
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Writing from hashmap to a txt file

I have a hashMap of Integer,String (K,V) and want to write only the string values to a file (not the key Integer) and I want to write only some 1st n entries (no specific order) to the file and not the entire map. I have tried looking around a lot…
mag443
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PrintWriter: reading and writing to the same file - file appears not to be saved before being opened again

I am trying to create a program which will write new data to a save file. The file has three "slots", that is, three Strings separated by delimiters. The main program calls the saver program with the slot as an argument, and the saver program…
user1928316
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"\n" not working when exported to .jar file

I have an output file for a program I have written. It is written by a FileWriter and BufferedWriter. FileWriter errout = new FileWriter(new File("_ErrorList.txt")); BufferedWriter out = new BufferedWriter(errout); Later I write to the…
user1816892
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Good practice in Java File I/O

I am trying to read integers from a file, apply some operation on them and writing those resulting integers to another file. // Input FileReader fr = new FileReader("test.txt"); BufferedReader br = new BufferedReader(fr); Scanner s = new…
Happy Mittal
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