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.

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I/O / Streams :: Clear Old Text Then Add New To File

Aug 12, 2014

I have a code that clear old text then add new text to text file afterthat download the file but the problem my code dose not add new text

FileInputStream fileToDownload ;
private static final int BYTES_DOWNLOAD = 1024;
response.setContentType("text/plain");
String name = request.getParameter("n");
String text = new String(request.getParameter("text").getBytes("iso-8859-1"), "UTF-8");

[Code] ....

How to clear old text then add new text to text file

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I/O / Streams :: Divide A Text File Into Blocks Of 128 Bits

Feb 7, 2006

I have to divide a text file into blocks of 128 bits. I think i must use the ByteArrayInputStream and ByteArrayOutputStream classes. is there any website showing how to user these two ByteArrayInputStream and ByteArrayOutputStream classes in detail. or it would be much better if you could show me a portion of the code.

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Searching Directories Recursively For File

May 8, 2015

I have a case: i have to make fast searching of a file in to all file systems(Linux or Windows). I use search directories recursively for file. Is there a quick way?

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JSF :: How To Open A File / Folder Directories In Firefox Browser

Jun 15, 2014

In our currenr project we have a requirement to open a local/network driver file/folder using JSF 2.0 <h:outputLink> in Firefox browser find the below sample code & correct it, how to achieve the above requirment

Sample.xhtml
<h:form>

<h:outputLink id="linkID" value="#{demoDataBean.dataLink}" target="_blank" >
<h:outputLabel value="#{demoDataBean.dataLink}" />
</h:outputLink>

[code]...

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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.

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Swing/AWT/SWT :: Retrieving Values From Property File That Matches Key

Aug 22, 2014

I have a properties file with a set of commands and their meanings (Command = the meaning). I Populated a jtree with the keys from the properties file, now when I click a node in the jtree (key) I want the value of that selected key to go in the panel that sits in my app next to the jtree.

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How To Make A Text File Only Use Lines In A Text File Beginning With A Certain Letter

Mar 15, 2015

I have a program that reads lines of text, but some of the lines of text aren't applicable and break the program. I'd like to put a letter in front of the lines in the .txt file I want to use, such as a #.

I need to make an if loop that'll check for the first letter on the line being #, and use the line in the program if true and skip if false. I'm guessing a boolean variable would be useful here to be true or false depending on the presence of #, but I don't know how to only read the first letter of each line, how can I do this?

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Read Text File Into Object Array And Creating Random Access File

Dec 8, 2014

I am working on a project that requires me to build a database with random access file, representing products, the base product contains a name (about 30 characters), a price (double), and a quantity (integer). I have worked on this project for probably 15+ hours and have tried so many things and feel like I've barley made any progress...

The part i am really struggling with is taking the data from the text file and creating an object array with it using the product class. Once ive accomplished that, i have to use that data to create a random access file with the data.

Here is the base Product class that must be used to create the objects for the array.

public class Product
{
public String pName;
public String stringName;
public double price;
public int quanity;

[Code] .....

And then here is the data from the text file that i must extract to use to create product objects.

Dill Seed,938,34
Mustard Seed,100,64
Coriander Powder,924,18
Turmeric,836,80
Cinnamon (Ground Korintje),951,10
Cinnamon (Ground) Xtra Hi Oil (2x),614,31
Cinnamon (Ground) High Oil (1X),682,19

These continue for about 40-50 entries, they are not separated by a blank line though i had to add those so it would display correctly, each entry is on its own line with name separated with spaces, then price after a comma, then quantity after the second comma.....

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Reading Text File Into Object Array And Create Random Access File

Dec 9, 2014

I am working on a project that requires me to build a database with random access file, representing products, the base product contains a name (about 30 characters), a price (double), and a quantity (integer). I have worked on this project for probably 15+ hours and have tried so many things and feel like I've barley made any progress...

The part i am really struggling with is taking the data from the text file and creating an object array with it using the product class. Once ive accomplished that, i have to use that data to create a random access file with the data. Here is the base Product class that must be used to create the objects for the array.

public class Product
{
public String pName;
public String stringName;
public double price;
public int quanity;

[Code]...

these continue for about 40-50 entries, they are not seperated by a blank line though i had to add those so it would display correctly, each entry is on its own line with name seperated with spaces, then price after a comma, then quanity after the second comma.....

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Reading Text File Into Object Array And Creating Random Access File?

Dec 8, 2014

I am working on a project that requires me to build a database with random access file, representing products, the base product contains a name (about 30 characters), a price (double), and a quantity (integer). I have worked on this project for probably 15+ hours and have tried so many things and feel like I've barley made any progress...

The part i am really struggling with is taking the data from the text file and creating an object array with it using the product class. Once ive accomplished that, i have to use that data to create a random access file with the data.

Here is the base Product class that must be used to create the objects for the array.

public class Product
{
public String pName;
public String stringName;
public double price;
public int quanity;
//Constructor
public Product( String pName, double price, int quanity )

[code]....

and then here is the data from the text file that i must extract to use to create product objects.

Dill Seed,938,34

Mustard Seed,100,64

Coriander Powder,924,18

Turmeric,836,80

Cinnamon (Ground Korintje),951,10

Cinnamon (Ground) Xtra Hi Oil (2x),614,31

Cinnamon (Ground) High Oil (1X),682,19

these continue for about 40-50 entries, they are not separated by a blank line though i had to add those so it would display correctly, each entry is on its own line with name separated with spaces, then price after a comma, then quanity after the second comma.....

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Read Text File Into Array Ask User To Save File And Print Data

Jul 14, 2014

New to programming. Am supposed to create a program that reads a text file (of integers) and computes a series of computations on these integers. I don't have the code for the integers in my code yet, (i know how to do those), but am struggling getting the array to simply print in the print writer. I have the user select a text file, read the file with a scanner, and then save the computations done from my code into another file. specifically, the problem is as follows: Write a program that uses a file chooser dialog to select a file containing some integers. The file contains an integer N followed by N integers. The program then uses a file chooser dialog to let the user specify the name and location of an output file to write results to.The data written to the output file will be as follows

(1) The original list of N numbers from the input file,
(2) The original list of N numbers printed in reverse order of how they appear
in the input file.
(3) The sum and average of these numbers,
(4) The minimum of all the numbers,
(5) The maximum of all the numbers.

[import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.Writer;

[Code]....

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Creating A System That Will Ask User To Create A File That Will Store To Text File

Mar 9, 2015

I am new to java and I am creating a system that will ask the user to create a file that will store to a text file, Once the user created the file I have a class that will let the user input the subject name that has been created, However, I keep on getting this java.util.nosuchelementexception.Here's my code:

public void display_by_name()
{
String id, name,total;
String key[]=new String[30];
String value[]=new String[30];
int i=0;

[code]....

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File Handling - Display Path Of The File In Text Field

May 6, 2014

I am facing a problem while executing a task. My task is to make such a code which will search for my source code file (abc.java) in all directories and then displays the code in textarea inside frame and along with that i also have to display the path of the file in text field. I have coded something but i am really not getting anywhere near my task.

import javax.swing.*;
import java.awt.*;
import java.io.*;
import java.util.*
 
public class Lab extends JFrame {

[Code] ....

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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?

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Program For Adding One Text File Into Zip File Without Extracting

Apr 9, 2015

java code for adding one text file into the zipped file without extracting It is possible in java code ?

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I/O / Streams :: Read € Symbol In A File

Aug 25, 2014

I have a problem with € symbol ... an application write a String content on the file system with following code:

out = new FileOutputStream(strPath + "import.xml");
out.write(trp.getTrpXMLModel().getBytes("ISO-8859-1"));

It's correctly wrote on the file system:

TT;Pierre-H€enri;;Orange Grove;zefezfezfez, Directeur Juridique;TT;;azdaz;01 53 33 56 87;ezfezfez;01 53 33 51 59;.....&ée&ée;;;;;;132;CORDIAL;aaa

But when the application try to read the previous file with following code:

BufferedReader in = new BufferedReader(new InputStreamReader(inStream,"ISO-8859-1"));
String line = in.readLine();

The application isn't able to properly read the symbol ... and return following line, without "€":

TT;Pierre-Henri;;Orange Grove;zefezfezfez, Directeur Juridique;TT;;azdaz;01 53 33 56 87;ezfezfez;01 53 33 51 59;.....&ée&ée;;;;;;132;CORDIAL;aaa

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I/O / Streams :: File Size Comparison

May 20, 2014

I would like to create a component to detect the file being modify before process.is it the right way to detect the file modification based on file size value?

Below are the flow:

1. Get the file size of a file
2. Used file size value encrypt it with MD5 algorithm, and say it generated us encrypted value "0123sdf"
3. to avoid user modify the file content, before file process, we take the file and do the encryption with md5 again, if it return value "0123sdf", then we are sure it doesn't have modification.

my question:
a. is it the right approach to detect file modification?
b. what the library advise to use or using java.security.DigestInputStream will do?

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I/O / Streams :: Creating Hidden File

Jul 30, 2006

I want to create hidden files, some sample code for doing this.

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I/O / Streams :: API To Read Metadata From MP4 File

May 13, 2012

I am looking for a pure java api that can read metadata from an mp4 file, I have looked online but all apis I found are wrappers to native code. How to read mp4 with java .....

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Retrieving Text Off Of A Button?

Nov 16, 2014

I am trying to check to see if the button has anything on it.

Line 81 says incompatible types: JButton cannot be converted to String ')' expected ';' expected

package PA7;
import javax.swing.JFrame;
import javax.swing.JLabel;
import java.awt.*;
import javax.swing.*;
import java.awt.event.ActionListener;

[code]...

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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?

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I/O / Streams :: How To Read In A Binary File Correctly

Nov 8, 2014

I have a binary file that has identifiers for the start of each record

You can see here that the record starts with 00 00 and the next record starts with 00 00 etc...

How do I read between these two points throughout the file?

RandomAccessFile database = new RandomAccessFile(databasePath, "r");
int start = 0;
int end = 0;
database.setLength(start);
database.seek(end);

The first start would be the start of the file, the next start would be the end of the first start and so on..

I'm just not sure how to put that into a loop.

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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]....

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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].....

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I/O / Streams :: Appending To Existing File Instead Of Overwriting It

Jul 24, 2014

I do most of my file I/O with {Scanner} for input and {PrintWriter} for output. I've got lots of places in my code that looks like:

Scanner source = new Scanner( new File( sourceName));
PrintWriter dstntn = new PrintWriter( new BufferedWriter( new FileWriter( dstntnName)));

But when I call the constructor for {PrintWriter} up above, it overwrites whatever the original contents of the file designated by {dstntnName} were, doesn't it? Is there a way to call the constructor so that any future writes to it simply append to the original contents, instead of overwriting them?

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