bufferedwriter

Why is BufferedWriter not writing to file?

由 ♀尐吖头ヾ 提交于 2019-12-10 22:33:48
问题 I have this code: String[] strings = {"Hi" , "You", "He", "They", "Tetrabenzene", "Caaorine", "Calorine"}; File file = new File("G:\\words.txt"); FileWriter fWriter; BufferedWriter bWriter; try { if((file.exists())) { file.createNewFile(); } fWriter = new FileWriter(file.getAbsoluteFile(), true); bWriter = new BufferedWriter(fWriter); //Convert Result objects to JSON and write to file for(int j = 0; j < strings.length; ++j) { bWriter.write(strings[j]); bWriter.newLine(); System.out.println(

Java BufferedWriter close()

由 不羁岁月 提交于 2019-12-10 17:28:28
问题 Assume that I have the following code fragment: operation1(); bw.close(); operation2(); When I call BufferedReader.close() from my code, I am assuming my JVM makes a system call that ensures that the buffer has been flushed and written to disk. I want to know if close() waits for the system call to complete its operation or does it proceed to operation2() without waiting for close() to finish. To rephrase my question, when I do operation2() , can I assume that bw.close() has completed

Do I need to implement synchronized on writing data to a same file by using BufferedWriter and FileWriter?

由 冷暖自知 提交于 2019-12-10 15:09:23
问题 I am working on Webmethods Integration Server. Inside there is a java service which is in form of a static java method for writing data to a log file (server.log) by using BufferedWriter and FileWriter. The static method code is like this: public static void writeLogFile(String message) throws ServiceException{ try { BufferedWriter bw = new BufferedWriter(new FileWriter("./logs/server.log", true)); bw.write(message); bw.newLine(); bw.close(); } catch (Exception e) { throw new ServiceException

Writing from Java to an XML document - Simple

由 落爺英雄遲暮 提交于 2019-12-10 10:05:10
问题 I know there's tons of questions on writing from Java to XML on stackoverflow, but it's all too complex. I feel I have a very simple problem that I just can't figure out. So I have a program that takes a bunch of user input and I have it currently creating and appending a text document with the results. I'll just post my writer code here: PrintWriter out = null; try { out = new PrintWriter(new BufferedWriter(new FileWriter("C:/Documents and Settings/blank/My Documents/test/test.txt", true)));

BufferedWriter and socket in java, write has no effect

由 柔情痞子 提交于 2019-12-09 01:39:24
问题 I'm writing a small client application to communicate with a server. I open a socket between my client and the server and can read anything that goes out from the server with a BufferedReader. This is read in a thread. However, when I write on the socket using a BufferedReader, nothing happens ! No exception but not any server response (and it should have a server response) Here is my code: socketWritter.write(message); socketWritter.write("\n"); System.out.println(socketWritter.toString());

How can I modify a text file inside a Jar file while runtime? [duplicate]

由 感情迁移 提交于 2019-12-08 07:37:06
问题 This question already has answers here : Modifying a file inside a jar (12 answers) Closed 3 years ago . Well as the question says, How is that possible? This file is my proyect structure (I'm using eclipse). When exported as Jar, I can access and print the "root.ini" content through console with the code below but, How can I write to that file while runtime? This method is called from 'Main.java' private void readRoot(){ InputStream is = getClass().getResourceAsStream("/img/root.ini");

buffered writer now writing to file

由 荒凉一梦 提交于 2019-12-08 04:07:36
问题 Could someone please point me in the right direction on why this is not writing to the .txt file? Here is the output i am getting when I print. I cannot figure out where the error in code is. As you can see from the output. its looks like everything is working correctly for the first loop. My first question is why does it not write the "val 5" to the .txt file? My second question is why does it not go again after the second matrix? I am a student and would love any feedback on my code to get

Writing from Java to an XML document - Simple

由 筅森魡賤 提交于 2019-12-06 02:49:55
I know there's tons of questions on writing from Java to XML on stackoverflow, but it's all too complex. I feel I have a very simple problem that I just can't figure out. So I have a program that takes a bunch of user input and I have it currently creating and appending a text document with the results. I'll just post my writer code here: PrintWriter out = null; try { out = new PrintWriter(new BufferedWriter(new FileWriter("C:/Documents and Settings/blank/My Documents/test/test.txt", true))); out.println(""); out.println("<event title=\""+titleFieldUI+"\""); out.println(" start=\""+monthLongUI

java : writing large files?

由 假如想象 提交于 2019-12-06 00:34:56
问题 Greetings , I get huge number of records from database and write into a file.I was wondering what the best way to write huge files. (1Gb - 10Gb). Currently I am using BufferedWriter BufferedWriter mbrWriter=new BufferedWriter(new FileWriter(memberCSV)); while(done){ //do writings } mbrWriter.close(); 回答1: If you really insist using Java for this, then the best way would be to write immediately as soon as the data comes in and thus not to collect all the data from ResultSet into Java's memory

Java read from one file and write into another file using methods

由 南楼画角 提交于 2019-12-05 19:06:01
I am learning Java and working on File IO and right now stuck in reading text from One file and write in another file. I am using two different methods first one for reading and displaying text in console from file #1 and using another method to write in file#2. I can successfully read and display contents from File#1 but not sure how to write the text in file#2. Here is the code which I have written so far: import java.io.*; public class ReadnWrite { public static void readFile() throws IOException { BufferedReader inputStream = new BufferedReader(new FileReader( "original.txt")); String
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