Write To TXT File Using Buffered Writer
Sep 22, 2014
Trying to write to a txt file using buffered writer - however I'm getting some issues.
BufferedWriter says 'The resource type BufferedWriter does not implement java.lang.AutoCloseable'
br says 'The type BufferedWriter is not visible'
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
public class FileWriter {
public static void main(String[]args){
[Code] .....
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Apr 2, 2014
I am using netbeans to create a hotel booking system, just tessting out code to get the booking information input to a file when the next button is clicked.
File file = new File("file.txt");
try (BufferedWriter br = new BufferedWriter(new FileWriter(file))) {
br.write("################################");
br.newLine();
br.write(" Booking Information");
br.newLine();
br.newLine();;
br.write("First Name: " + TxtName.getText());
} catch (IOException ex) {
Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
}
Nothing is getting wrote to the file though. Does that code seem right?
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Apr 25, 2014
I am completing a USACO online problem and am trying to create a print writer to write to my file(ride.out). I did this:
PrintWriter out = new PrintWriter(new BufferedReader(new FileWriter("ride.out")));
However, a load of undefined constructor errors come up for PrintWriter(BufferedWriter) and BufferedWriter(FileWriter). I have imported java.io.* so I don't know what the issue is. This has worked before.
edit: bufferedreader? i give up(not literally)
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Feb 2, 2015
I've been working on a saving system for a game I'm working on using java IO writer and reader. When I tried exporting it (as a executable jar) to test I couldn't get it to work, when it worked before. If I had to guess it's the file location not being able to find the file. Which it just looks like :
FileReader end = new FileReader("Saves.txt");
I don't exactly know how to set it up to read the file. I'd tried giving it a look up but I don't know how to exactly word my problem.
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Apr 10, 2014
I am trying to write to an output file that the user names. I have flushed and closed the printwriter, so now I am at a loss. The console output works fine with the formatting, and the file is created, but I cannot get the file to populate. I have the following:
public static void main(String[] args) {
try
{
Scanner kb = new Scanner(System.in);
System.out.print("Input file: ");
String inputFileName = kb.next();
System.out.print("Output file: ");
String outputFileName = kb.next();
// Construct the Scanner and PrintWriter objects for reading and writing
File inputFile = new File(inputFileName);
Scanner in = new Scanner(inputFile);
PrintWriter out = new PrintWriter(outputFileName);
[code]....
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Sep 8, 2014
I am trying to read an image I have in the location of my project, So I do this:
When I read it in the try/catch like: BufferedImage image = ImageIO.read(new file(""));
And try to access it after the try/catch, it does not know that image exists, so I need to declare it as a global variable for that class first, and then it works.
public class Gui extends JFrame
{
private BufferedImage image1;
public Gui() {
super("MyApp");
setDefaultCloseOperation(EXIT_ON_CLOSE);
setLocationRelativeTo(null);
setVisible(true);
initUI();
[Code] ....
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May 23, 2014
I put the code on pastebin.com because it is relatively long. How to improve this code that does not occur starvation and was ucziwy terms of writers and readers.
[URL] .....
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Mar 15, 2014
1. creates a file.
2. ask user to write into that file
3. save the file
4. print content of file.
Is my current exercise, so far i have gotten the code to create a file. What should i use to ask user to write into that file and save?
package assignment7;
import java.io.*;
public class Exercise2
{
public static void main ( String [ ] args ) {
String filePath="newfile.txt";
File newFile = new File ( filePath ) ;
[Code] .....
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Mar 17, 2014
1. creates a file.
2. ask user to write into that file
3. save the file
4. print content of file.
is my current exercise.so far i have gotten the code to create a file, and ask the user to input their age.what should i use to save what the user writes into the file?
Java Code:
package assignment7;
import java.io.*;
import java.util.*;
public class Exercise2
{
public static void main ( String [ ] args ) throws IOException
{
Scanner scan = new Scanner(System.in);
[code]....
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Apr 10, 2015
how to use a Scanner to read data from a file. Is it possible to also average a set of numbers at the same time its being read?
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Feb 2, 2014
I want to write an application which stores files inside of itself, like a Zip file, but it will not be a zip or have the zip compression class.
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Dec 8, 2014
I have created a program that allows a pizza shop to enter a customers orders (via 3 seperate panels of options), and calculate a total. Everything works just fine, and now we have to take it a step further and record the sale data in a .txt file (which will include the Crust Type, Toppings, and Extras).
I need to make it so that when a user clicks the calculate button, it also writes to a file (in this case, SalesRecords.txt). I have it all set up, but for some reason I can not get it to work. The error I get is:
"error: unreported exception FileNotFoundException; must be caught or declared to be thrown
PrintWriter outputFile = new PrintWriter(filename);
Here's my code: (the calculate button that I am working with is indicated by a comment)
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.text.DecimalFormat;
import java.io.*;
import java.io.BufferedWriter;
[I looked up the exception I got, and just so everyone knows I made sure that the file "SalesRecords.txt" DOES EXIST. It is in the same folder as my java and class files for this program. I even tried defining the absolute file path for SalesRecords.txt and that changed nothing.
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Mar 5, 2014
i start work with TxT files. And i need know how to write text in the next line if file exist. My code just last text replace new.. Here code :
Main :
package YoYo;
import java.util.Scanner;
public class Main {
static String atsakymas;
static String FileName;
[code]....
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Nov 3, 2014
For a class, I'm making a prison system program. The prison has cell blocks, each cell block has cells, each cell has bed(s), and each bed has prisoners. There are also visitors and visits. I thought, rather than write all of those to different files, I could just write the entire prison to a file and make all the classes under it implement serializable. The instructor said that is a bad practice and we shouldn't do it. So I'm thinking I'll make the prison non-serializable. But the prison has maps of cell blocks, inmates, visitors, and visits. I think I'll make all those serializable and I'll also make everything a cell block contains serializable as well. Then I can just read the cellblocks from the file. But is that too easy as well? Is that a bad practice?
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Apr 9, 2014
how to write java data to pdf file
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Mar 19, 2014
My program successfully reads a file, reports back what it finds and creates an output file. However, I cannot get it to write to the output file, it is always blank!
Here's my code:
import java.util.Scanner;
import java.io.*;
public class Ex19
{
public static void main (String [] args)
{
//Variables
[code]....
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Dec 10, 2014
I want to write a text area to a file which I have accomplished however the formatting for how it is written into the text file is different. Is there a different library I must use to retain the formatting?
I'm using a BufferedWriter to write to the file
if (!file.exists()) {
try {
BufferedWriter output = new BufferedWriter(
new FileWriter(file));
output.write(textArea.getText());
output.close();
} catch (IOExcception io) {
io.printStackTrace();
}
}
If I write this into the text area:
DreamInCode
YouTube
Google
The text file contains text that says:
DreamInCodeYouTubeGoogle
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Mar 7, 2014
I extended the SimpleFileVisitor class. And I am able to traverse the file directories. I give a file path then have it display the files full path and out put that to a text file. Here is what i have so far.
public class Main {
public static void main(String[] args) throws IOException {
Path fileDir = Paths.get("somedirpathhere");
FileTraversal visitor = new FileTraversal();
Files.walkFileTree(fileDir, visitor);
[code]...
I am able to printout of the arraylist to the console. I cant get it to write to a text file whats in the arraylist to a text file.
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May 14, 2014
Main:
package shoppingcartselection;
import javax.swing.*;
import java.util.ArrayList;
public class Main
{
public static void main(String[] args)
{
ArrayList<Item> items = new ArrayList<>();
[Code] .....
I have it to save to a text file the subtotal, sales tax, and the total cost of all items in the cart after clicking on Checkout. I need it to also show the Items that where in the cart, along with how much each Item costs. I've tried this:
public void save(ArrayList Receipt) throws FileNotFoundException
{
PrintWriter pw = new PrintWriter(new FileOutputStream("Receipt.txt"));
for (Item itemsInCartNames : itemsInCart)
pw.println(itemsInCartNames);
pw.close();
}
But this is what gets saved to the Receipt.txt file:
shoppingcartselection.Item@16752c9
itemPices.txt:
Magic Booster Pack, 4
Magic Fat Pack, 40
Magic Intro Deck, 12
Magic Duel Deck, 20
Magic Card Sleeves, 8
Magic Play Mat, 25
Magic Booster Box, 120
Dice Pack, 6
Video Game, 60
Book, 10
Candy, 1
Soda, 1
Lunch, 10
Water, 1
Shirt, 10
Hat, 5
Game Console, 400
Desktop, 800
Laptop, 1000
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Jun 4, 2014
I want to read and write json to/from a file. I read the following document:
JsonReader (Java(TM) EE 7 Specification APIs)
I try to define a JsonReader object in Eclipse:
JsonReader jr
But there appears to be no import for it. Where I am supposed to get the Json library?
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Jun 11, 2014
I want to write byteArray in file from String and if "/n " newline comes in String it should write from next line in file. I tried and no content starts from newline in file.
Suppose String s= "This is my Java Program /n Converting string to byteArray";
Output in file should be as :
This is my Java Program
Converting string to byteArray
When i am converting byteArray in String, it showing me same output as i wants but not in file.it showing me on console.
psvm(String arr[]){
String s= "This is my Java Program
Coverting string to byteArray";
FileOutputStream fos = new FileOutputStream("filepath");
fos.write(s.getBytes());
fos.close();
}
output in file : This is my Java Program Converting string to byteArray
Any other way to get content after newline in next line.
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Oct 17, 2014
I'm rather new to programming and I'm trying to make a gui program that will allow the user to create text files. They will be prompted to enter what they'd like to save their file as and then they will be allowed to input text to that file . They will also be allowed to open their files to modify or view its contents. So to start things off, I'm making a prototype if you will.. I've been able to save to a file the problem occurs when I try to read/display it.
Main Class:
public class MainActivity {
public static void main(String[] args) {
// Access to other classes
WriteFile writer = new WriteFile();
ReadFile reader = new ReadFile();
[Code] ....
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Jul 25, 2013
My background is mainframe and i'm new to java. We're moving from mainframe to the java world and I'm trying to achieve a task. I have a main folder and then bunch of sub folders and each sub folder has bunch of xml files, files size are varies some of them are 900kb. I need to read these xml files and send the output to the txt file (comma separated).
Some possible options or sample example... Please find below the sample xml file. I need to extract information's only where
FORM name="F00001".
[CODE]<PACKET>
<FORM name="F00001" sequence="0">
<FIELD sequence="1">02</FIELD>
<FIELD sequence="2">00000</FIELD>
<FIELD sequence="3">CAB100</FIELD>
<FIELD sequence="4">TEFAP001</FIELD>
<FIELD sequence="5">EMPTY FIELD</FIELD>
<FIELD sequence="6">009.999.989</FIELD>
[Code] .....
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Aug 14, 2014
I've been closely following a tutorial series, and as far as I can tell my code is exactly the same, but not functioning.
The app throws a nullpointer exception here on "controller.saveToFile(fileChooser.getSelectedFile ());"
// Export data item
exportDataItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (fileChooser.showSaveDialog(MainFrame.this) == JFileChooser.APPROVE_OPTION) {
try {
controller.saveToFile(fileChooser.getSelectedFile());
[Code] ....
There are no errors popping up in the code, and I dont understand why there is a null pointer exception when Im saving this file.
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Feb 6, 2015
I wanna learn to create a method where I use a scanner or any other way to input.The stuffs I input will be strings. The whole thing will be like a destination creator.So if I input the string USA, it will write this to a file:
1:USA
When I go to the method again the ID will be added so if I input UK, the file will contain:
1:USA
2:UK
Now if I terminate the program, next time when I run it again it will be able to read the ArrayList, so if I wanna go to the method again and write: Norway the file will contain:
1:USA
2:UK
3:Norway
Later I also want to be able to use println to show all of these lines from the file, as well I would like to be able to delete an ID, so if I delete ID 2 the file would contain:
1:USA
3:Norway
I'm quite new to Java, I'm in a Java course since soon 3 weeks back and I have sure learned a lot, all the loops and basic statements that exist in most languages, but now when it comes to this I just don't understand.
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Dec 6, 2014
Let's say if I want to create a dot file that print this graph in Java, how do i go about it?
I'm starting with this:
PrintWriter writer = new PrintWriter("graph.dot");
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