I/O / Streams :: Unable To Write Sample Data Into Newly Created File

Nov 29, 2014

My code below creates the 2 files successfully, but it is not able to write the sample data into the newly created file. I can't figure out the reason why.

Another strange thing is that when I tried inserting System.out.println calls for debugging, nothing prints out.

try{
// stuff here
}
catch(FileNotFoundException fileNF){
String dirString = System.getProperty("user.dir");
String defaultFile = "config";
String currentFile = "currentconfig";
Path filePath = Paths.get(dirString, defaultFile);
Path filePath2 = Paths.get(dirString, currentFile);

[Code]...

View Replies


ADVERTISEMENT

When To Delete Newly Created File

Jun 8, 2014

I have a method that checks to see if a file exists, if so, it reads the data contained therein, if not it calls another method then exits.

public void checkLoadPreviousStationStatus() throws FileNotFoundException, IOException,
ClassNotFoundException, EOFException, TempArrayOutOfBoundsException{
File f = new File(staFileName);
//if station file already exists load the info
if(f.exists() && !f.isDirectory()){

[Code] ....

My question, do I need to delete this file before exiting the method f.delete();? If not, what happens to it when I exit the method?

Memory recalled from a long ago taken c++ class: It's just reserving a memory location that will or will not be used isn't it? If nothing is stored in that location the reservation goes away right?

View Replies View Related

I/O / Streams :: Unable To Create A Print Writer To Write To File

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)

View Replies View Related

I/O / Streams :: File Not Created Until Program Exit

Aug 28, 2014

I have been going over my code line by line, over and over again for nearly and hour now...When I execute method `file.createNewFile()`, the method returns true and throws no exceptions. It even says that the file exists. However, the file is not created and cannot be accessed until the program has exited.

File portLib = new File("");
private class RememberPortAction extends AbstractMenuItemAction
{
methods...
protected void actionPerformed() {
LibraryCreator creator = new LibraryCreator(self, logger);
File newPortLib;

[code]....

View Replies View Related

I/O / Streams :: Unable To Read File Using Google Guava Resource Library In JBehave Project

Jun 25, 2014

I'm getting an IllegalArgumentException returned when I try to get a file using guava library.

I previously had the function working when the file was in a different location, before I switched to running JBehave, my steps run but it fails to find the resource, even after I've moved it.

The code being executed is (this worked previously before using JBehave):

String xMLTemplateFileName = "OBOE-confirmation"
public static void setXMLTemplateFile(String xMLTemplateFileName) throws IOException {
URL url = Resources.getResource(xMLTemplateFileName+".xml");

The file I'm looking for is in the root folder for src/main/resources and also src/test/resources, previously I had it within a completely different location before I switched over to JBehave. I've tried it within a subdirectory in the same locations too.

I've recently updated the pom.xml to try to include the location required.

Extract from pom is below:

<!-- JBehave Build Details -->
<build>
<pluginManagement>
<plugins>

<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>jaxb2-maven-plugin</artifactId>
<version>1.6</version>

[Code] ....

View Replies View Related

Write Program For Diamond Shape In JAVA For Given Sample Pattern?

Oct 5, 2014

My son want to create a java program (Diamond shape) that can plot graph for with the following data.

Pattern type is:

* *

* *

*

* *

* *

*

View Replies View Related

I/O / Streams :: How To Grab Last One Hour Data From Log File

Jul 17, 2014

I have a log file which goes like this..

INFO: Jul 07 00:00:15 DataSource 2zvw8p93107gev14wko86|34e51ca2: Total connections 4 idle 4 busy 0 unclosed orphans 0 pool unknown
PERFORMANCE: Jul 07 00:00:15 Garbage Collection: ParNew 5 51ms in 59 seconds. [SpeedoLoggingBean] Thread SpeedoBean
INFO: Jul 07 00:00:15 Speedo: 2,222,786K of 4,054,528K - 1,831,741K free, 4,952epm, 1 buffered, 216 threads, 49.1% CPU, permgen 173,731K of 262,144K - 88,412K free
Jul 7, 2014 12:00:15 AM org.geotools.data.wfs.v1_0_0.WFSTransactionState commit
SEVERE: number of fids inserted do not match number of fids returned by Transaction Response. Got:1 expected: 0

[code].....

What I need is to grab only the last hour data from this log file?

View Replies View Related

I/O / Streams :: FileOutputStream Is Not Writing Data To A File?

May 25, 2014

My program creates a file but cannot write to it and i cannot figure out why.

How can i fix this code so that the FileOutputStream writes the String "Output" to the file HighScore.

public boolean ScoreWriter(int HighScore, int ScoreNum){
boolean writ = true;
System.out.println(HighScore + " " + ScoreNum);
try{
File ScoreFile = new File("HighScore");
if (!ScoreFile.exists()){
ScoreFile.createNewFile();
}else if (ScoreFile.exists()){
ScoreFile.delete();
ScoreFile.createNewFile();

[code].....

View Replies View Related

Unable To Write Text File With Information Stored

Jul 27, 2014

I am trying to write to a text file with information stored like this.

brick 500
stone 500

And so on. Here is the code I am using to write to the file.

switch(record){
case "brick":
x.format("%s%n", "brick " + value);
closeFile();
break;
case "log":
x.format("
%s%n", "log " + value);
closeFile();
break;

When I write like this, putting deletes the first line. What I can look into or other functions that would be useful?

View Replies View Related

I/O / Streams :: POI - Log File To XLSX / Writing Data In Unreadable Format

Jul 16, 2014

When I am trying to read data from BufferedReader and writing into excel using FileOutputStream object with POI APIs then i am getting the data in excel file in bad formats. you can check the log file and excel file attached for more information.

Here my problem is I cannot use BufferedWriter in place of FileOutputStream because POI class XSSFWorkbook only have one write method and we can only pass FileOutputStream class object there.

public void readFile()throws IOException {
BufferedReader inputStream = null;
FileInputStream fis=null;
InputStreamReader isr = null;
//Blank workbook
XSSFWorkbook workbook = new XSSFWorkbook();

[Code] .....

View Replies View Related

I/O / Streams :: Reading From And Writing To A File Then Read Again Including Data Written

Oct 11, 2014

I'm having a bit of trouble with using the Scanner and the Printwriter. I start with a file like this (1 = amount of Houses in the file)

1
FOR SALE:
Emmalaan 23
3051JC Rotterdam
7 rooms
buyprice 300000
energylevel C

The user gets (let's say for simplicity) 3 options:

1. Add a House to the file,
2. Get all Houses which fullfil requirements (price, FOR SALE / SOLD etc.) and
3. Close the application.

This is how I start:

Scanner sc = new Scanner (System.in);
while (!endLoop) {
System.out.println("Make a choice);
System.out.println("1) Add House");
System.out.println("2) Show Houses");
System.out.println("3) Exit");
int choice = sc.nextInt();

Then I have a switch for all of the three cases. I keep the scanner open, so Java can get the user input (house = for sale or sold, price = ... etc). If the user chose option 1, and all information needed is inputted and scanned, the House will be written to the file (which looks like what I typed above).

For this, I use try (PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter("Makelaar.txt", false)))). This works perfectly (at least so it seems.)

If the user chose option 1, and all requirements are inputted and scanned, the Houses will be read (scanner) from the file and outputted. For this I use the same Scanner sc. This also works perfectly (so it seems atleast).

My problem is as follows: If a House has been added, I can only read the House(s) which were already in the file. Let's say I have added 2 houses, and there were from the start 3 houses. If option 2 is chosen, the first 3 houses will be scanned perfectly. An exception will be caught for the remaining 2 (just added) Houses. How can I solve this? I tried to close the Scanner, and reopening it, but apparently Java doesn't agree with this

View Replies View Related

I/O / Streams :: Report Generation Tool For Huge Data In Different File Formats

Apr 8, 2014

I need to generate reports for huge data (around 2 to 5 lakh records) in different file formats (PDF , XLS , RTF , XML) in my web application.

Data will be fetched from database.

I have been searching for a best open source report generation tool and ended up on choosing on Dynamic Reports.

Aspose , is licensed and unluckily we could not afford to at this moment.

Whether i can use Dynamic Reports , or is there any other tool available.

View Replies View Related

I/O / Streams :: Does Printwriter Always Truncates Existing File To 0 Size Before Adding Any New Data

Jun 13, 2014

Does printwriter always truncates the existing file to 0 size before adding any new data ??

View Replies View Related

I/O / Streams :: How To Write A File Into Unix Folder From Windows Folder Using Java

Oct 30, 2014

I need to copy a file from Windows folder to unix folder using Java

I need a FTP utility.

The file is processed by a Java program and the file has to be written to Unix folder

I have the unix server name and folder name.

how to do it?

View Replies View Related

How To Create Sample Optical Mark Recognition To Extract Data In Java

Nov 10, 2014

my idea is auto recognize when i put image like survey and that survey has shape box and it random area location and some shape box also character and number and can generated data that recognize in csv file.

View Replies View Related

ABV Calculator - Unable To Set JLabel Properly On Top Of Created Window

Dec 19, 2014

So I am working on an ABV calculator for some practice, and one problem I am running into is that I am unable to set a JLabel properly on the top of the window that is created. It will display the text with no problem, but only on one column. Is there a way to center a JLabel across 2 columns? The label I am working with is titleL.

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.text.DecimalFormat;
public class Beer_Calculator extends JFrame

[Code] .....

View Replies View Related

How To Write Java Data To Pdf File

Apr 9, 2014

how to write java data to pdf file

View Replies View Related

Write Same Data To Stdout And To Save File

Apr 11, 2014

I need to write the same data to stdout and to a save file. In C I'd do something like:

void doWrite(int fd, char *stuff) {
fprintf(fd, stuff);
}
if(someFlag)
doWrite(STDOUT, data[]);
doWrite(saveFd, data[]);

Google shows me how to use file I/O, and how to use stdio, but not how to combine the two easily.

With my *nix command line I could "program file | tee savefile", but savefile holds the result of prior runs, gets read before I parse 'file', and this command line zero's out savefile before the program can read it.

The data is standard ASCII, I doubt I'll ever have 20k of data.

View Replies View Related

Write Data For Three Products To Random Access File - Unexpected EOFException

Jul 11, 2014

I'm trying to write data for three products to a random access file, but I have a problem. Each product has a code and a price. After writing them to my file, I want to get to the second field or product. I do this by getting the length for each record, and multiplying it by the field number I want to go to. I use the result for the seek() method of the RandomAccessFile object. It is giving me an EOFException, but when I use 0 for the seek method i get the data for the first poduct or field.

Java Code:

public static void main(String[] args) {
final int RECORD_LENGTH = 16;
try(RandomAccessFile productsOutput = new RandomAccessFile("C:UsersalfonsoDesktopBinaryTestRandom.ran", "rw")) {
String[] codes = {"java", "jsps", "txtp"};
double[] prices = {49.5, 19.9, 29.9};
for(int i = 0; i < codes.length; i++) {

[Code] .....

View Replies View Related

Swing/AWT/SWT :: Passing Data Through Globally Created Table Variable?

Jun 14, 2014

I have created a DefaultTableModel tablel as a Global variable. The table is then created and attached to a Grid bag layout. Then I want to call the table again in another method to add rows of data into it. Hopefully that makes sense.

So the addrow for the table is located in the final method private class CalcButtonListener implements ActionListener

When I debug the code, deftablemodel variable is carrying NULL data.

Also to make things even more complicated, The actual headers for the table aren't showing up,... not entirely sure why though.

import java.awt.BorderLayout;
import javax.swing.*;
import java.awt.event.*;
import java.awt.Dimension;
import javax.swing.JOptionPane;
import javax.swing.JMenuBar;

[code]....

View Replies View Related

Swing/AWT/SWT :: Window To Submit Data Freezing When Created Inside Mouse Clicked Event

Feb 18, 2014

I'm trying to right a GUI in swing, and as part of my program, I want to open a secondary window out of the main window when a mouse clicks on the main window. Then, once I click a button on the secondary window, I want that window to close and submit data to the main window (like an info form). I have almost figured out how to do this, except for one problem. By putting a variable inside my form window called "ready," and then in my main window running a loop that constantly checks if ready is true and doesn't proceed until its true, I can create the form window, modify the values in it (currently just one value called "difficulty" that's modified by a jSlider), and then when i click the "begin" button, ready is changed to true, the form window closes, and the main window can proceed. However, when I try to put the while loop checking the ready variable inside a mouseClicked method in the main window, the form window freezes when it opens, and you can't see any of its content or modify it in any way (you can't even close it).

Here is my code:

//form window class
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
public class formWindow extends JFrame {
private JTextField instructions1;

[Code]...

View Replies View Related

I/O / Streams :: Generate File Tree Structure Of Mounted Unix File System

Apr 22, 2014

I am creating a web application that runs on server X(unix) and it has another unix system mounted on it. I want to generate the file tree structure of this mounted unix file system and show it on to a web application so that users can select a file and move it onto this current unix machine.

I know this sounds stupid and you may want to say why cant we directly copy the file, I am doing a proof of concept and using this as a basis.

View Replies View Related

I/O / Streams :: Retrieving File Directories From A Text File?

Jun 25, 2014

Let's say I have a text file and in the text file exists file directories as such:

'assets/picture1.png'
'assets/picture2.png'

And so on...

How would I then read from this text file and then create those files using 'new File()'?

Here is my code:

private void getFiles() throws IOException{
files = new File[10];
Scanner scan = new Scanner(new File("files.dat"));
int count = -1;

[Code]....

It does print out those files, but it doesn't create them.

View Replies View Related

I/O / Streams :: Get Specific Value From Txt File

Sep 22, 2014

I know that it's possible to retrieve a line from a txt file but say for example my file looked like this:

staff id = 1
firstname
surname
age

staff id =2
firstname Kate
surname Hollar
age 33

staff id =3
firstname Daniel
surname Hong
age 21

It is possible to retrieve just the staff id's?

View Replies View Related

Created New Project At Eclipse With Code Pasted Inside DomApli Container In Java File

Aug 11, 2014

I created a new project at eclipse with this code pasted inside a domApli container in a java file, I tried to run it but it wont work,

package domApli;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Prg2 extends JFrame implements ActionListener{
JLabel lblNom;
JLabel lblEdad;
JTextField txtNom;

[code]...

View Replies View Related

Unable To Find Data Record

Feb 7, 2014

I am running this method but for some reason I am not able to find the data record, it keeps going to the catch. I have the data.txt file in the same directory as the java file.

public static Games[] gamesRecord(){
Games[] game = new Games[50];
try{
Scanner dataFile = new Scanner(new File("data.txt"));
for(int i = 0; i > 50; i++){
game[i].title = dataFile.next();
game[i].releaseDate = dataFile.nextInt();
game[i].redistributions = dataFile.nextInt();
game[i].platformRelease = dataFile.next();

[code]....

View Replies View Related







Copyrights 2005-15 www.BigResource.com, All rights reserved