filewriter

Consider the following code: m_Writer = new PrintWriter(new FileWriter("LoginHistory.dat")); m_Writer.println(Integer.toString(s_NumOfLogins)); m_Writer.println(m_LoginHistoryStr); m_Writer.close(); Any ideas why I don't find any file called LoginHistory.dat? Thanks Update: I've just found that I get an exception after line: m_Writer = new PrintWriter(new FileWriter("LoginHistory.dat")); and its details are: Any ideas what is the real problem? Listening for transport dt_shmem at address: tomcat_shared_memory_id 27/05/2012 15:52:17 org.apache.catalina.startup.HostConfig checkResources INFO:

This question already has an answer here: What is a stack trace, and how can I use it to debug my application errors? 7 answers How do I declare and initialize an array in Java? 24 answers I'm using an array of String[3] to store user input which is got from 4 JTextFields I then output the array to a txt file: String[] userInfo = new String[3]; userInfo[0] = sourceTextField.getText(); userInfo[1] = usernameTextField.getText(); userInfo[2] = passwordTextField.getText(); userInfo[3] = emailTextField.getText(); for (String userInfo1 : userInfo) { try { BufferedWriter writer = new BufferedWriter

This question already has an answer here: BufferedWriter not writing everything to its output file 8 answers I am doing a lab where we have to read in an external file, take some statistics on the data, and then create and write a new file with the stats. Everything in my program works except for writing the file, which I cannot understand why my method won't work. BufferedWriter writer; public void writeStats(int word, int numSent, int shortest, int longest, int average) { try { File file = new File("jefferson_stats.txt"); file.createNewFile(); writer = new BufferedWriter(new FileWriter(file)

Is there anyway I can write to an already existing file using Filewriter For example when the user clicks a submit button: FileWriter writer = new FileWriter("myfile.csv"); writer.append("LastName"); writer.append(','); writer.append("FirstName"); writer.append('/n'); writer.append(LastNameTextField.getText()); writer.append(','); writer.append(FirstNameTextField.getText()); I want to be able to write new data into the already existing myfile.csv without having to recreate a brand new one every time Yeah. Use the constructor like this: FileWriter writer = new FileWriter("myfile.csv",true);

This question already has an answer here: Correct way to close nested streams and writers in Java [duplicate] 10 answers Consider a BufferedReader as below: writer = new BufferedWriter(new FileWriter(new File("File.txt"), true)); In this case at the end of the application, I am closing the writer with writer.close() Will this be enough? Won't that FileWriter created with new FileWriter(new File("File.txt"), true) need to be closed? It is not necessary to close it, because BufferedWriter takes care of closing the writer it wraps. To convince you, this is the source code of the close method of

The code I've written is supposed to overwrite over the contents of the selected text file, but it's appending it. What am I doing wrong exactly? File fnew=new File("../playlist/"+existingPlaylist.getText()+".txt"); String source = textArea.getText(); System.out.println(source); FileWriter f2; try { f2 = new FileWriter(fnew,false); f2.write(source); /*for (int i=0; i<source.length();i++) { if(source.charAt(i)=='\n') f2.append(System.getProperty("line.separator")); f2.append(source.charAt(i)); }*/ f2.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); }

This question already has an answer here: How to create a file in memory for user to download, but not through server? 19 answers HTML5 introduces the FileWriter class. With this class you can make Blobs. (A File is an extension of a Blob.) With JavaScript you can make a Blob and for instance show it using the dataURL. Example: var bb = new BlobBuilder(); bb.append('some text') var blob = bb.getBlob('text/plain'); var fr = new FileReader(); fr.onload = function(e) { document.location = this.result; // voila the dataURL } fr.readAsDataURL(blob); But that's not good enough :) I want the newly

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 (deprecated) and Indexed Database API FileReader and FileWriter API (requires user to select files each time the application loads) But apparently there is no File Storage. Of course, there is a manifest-based caching , but it's just a cache and is not supposed to be used as a user data storage. Does it mean that the user of WebApp is forced to use some sort of a cloud file storage? Is there any way to save large