bufferedwriter

问题 Im trying to limit the size creation of one file in my java app. For that I made this sample code which I declare one variable lenght of 32 bytes, start WriteOnFile method looping it until 32 bytes. The problem is, it doesnt matter the value I set set on FILE_SIZE (Higher or lower) the download file is always coming with 400kb - that means my code is working since the original file is 200Mb but has some logic mistake. is there another way to do this? cos I based myself on this post How to

问题 For a project I need to append to a textfile using UTF-8 encoding. During my research I found two possibilities: BufferedWriter out = new BufferedWriter( new OutputStreamWriter(new FileOutputStream("file.txt), "UTF-8") ) This will write to my file in UTF-8, but it will overwrite it, rather than append to it if it already exist. Then I found the code to apend to an existing file with a parameter in the FileWriter , but this will not use UTF-8 explicitely, rather than use the default system

问题 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

问题 I have a problem to write these detail in File. I am trying to write this detail in file but some how this function create File in specific location but its not writing anything into the file. public void writeBillToFile(double amount , double billingAmount,double taxAmount, double discount ,double transactionID , double billingNumber , int customerID , String tableNumber ,ArrayList listObject ) { FileWriter fw=null ; BufferedWriter bw =null; Date d=new Date(); long currentTimestamp=d.getTime

问题 How do I convert the FileWriter to OutputStreamWriter ? This is the directory that I stored the .java files. src/RX/example.java where RX is the package name. I inserted all the images and text files inside the same directory. Here is my working code with FileWriter. try { StringReader stringReader = new StringReader("Save this Message"); BufferedReader bufferedReader = new BufferedReader(stringReader); FileWriter fileWriter = new FileWriter("src/RX/rxUser.txt"); BufferedWriter bufferedWriter

问题 I have this Method that Lists the Files in a Directory and I need to write the same to a file. Apparently my System.out.println(); is able to list the files and their Sizes and the Dates they were Modified. But My bufferedWriter Does not write Anything in the File. Here is My Method; public void walk( String path, int limit ) throws IOException { File root = new File( path ); File[] list = root.listFiles(); File rep = new File("report.txt"); SimpleDateFormat sdf = new SimpleDateFormat("MMM/dd

问题 Server program : import java.io.*; import java.net.*; public class server { public static void main(String args[]) { try { ServerSocket ss=new ServerSocket(2000); Socket s=ss.accept(); BufferedReader br=new BufferedReader(new InputStreamReader(s.getInputStream())); String str; while((str=br.readLine())!=null) { System.out.println(str); } } catch(Exception e) { System.out.println(e); } } } Client program : import java.net.*; import java.io.*; public class client { public static void main

问题 I've come across a problem using FileOutputStream and BufferedWriter in Java. If my disk space is full and I'm trying to write, it will throw IOException (which is correct), but when calling the writer.close(), it will fail to close the resource, throwing another IOException and keeping the resource opened! Here is my workaround with writer.flush() . It seems to work, but is there a better way to handle this? BufferedWriter writer = null; try { writer = new BufferedWriter(new

问题 I've just finished reading 'Java for Dummies' and have begun to create a simple POS program. I have been having trouble getting the program to do what I want it to do! I have two actionListeners linked to each of the following buttons, 'Amigos' and 'Fosters'. I also have two text fields, one showing the price of the individual drink and then other used for a sub-total. I did have the sub-total working to add up multiples of the same drink, but not an 'Amigos' with a 'Fosters'. This was

问题 I was testing out writing to files with this code: package files; import java.io.BufferedWriter; import java.io.File; import java.io.FileNotFoundException; import java.io.FileWriter; import java.io.IOException; public class FileTest1 { public static void main(String[] args) { try { try { File f = new File("filetest1.txt"); FileWriter fWrite = new FileWriter(f); BufferedWriter fileWrite = new BufferedWriter(fWrite); fileWrite.write("This is a test!"); } catch(FileNotFoundException e) { System