How To Create And Write Files With Java

Jun 19, 2014

How come that nobody has a normal name? ... like:

E40S,
EcAABtdtcC,
eveascavsa7242,
GrGGDahkcA,
HaHKNhibzB,
HbJFZqxsgR,

or almost nobody.

Second question, this is the exercise I have to make:

write a program that reads a sentence and write it on a file separating each word on a diffrent line of the file

Java Code:

package vacanze_estive_8;

import java.io.File;
import java.io.EOFException;
import java.io.PrintWriter;
import javax.swing.JOptionPane;

[Code] ....

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How To Create Java Files Into Windows Applications (Exe Files)

Oct 26, 2014

What step to know to develop software..

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Best Way To Read / Write Files In Java?

Mar 31, 2014

I have seen different methods of creating and reading files (specifically text files) in Java. The PrintWriter method or the Formatter with a Scanner to read the file, using a BufferedWriter with a BufferedReader, etc. They will all read/write text files, but from what I understand they do so in different ways. When would it be more beneficial to use a buffered writer than, say, PrintWriter, which is much simpler code-wise? Is there a "best" way to handle i/o in general in Java?

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Create And Write To A Excel File From A Java Program?

Jul 10, 2007

I want to create and write to a excel file from a java program. I found a tutorial online and wrote a java file as under:

Java Code: import java.io.File;
import java.util.Date;
import jxl.*;
import jxl.write.*;
public class jExcel{
WriteableWorkbok workbook = Workbok.createWorkbook(new File("output.xls"));
public static void main(String args[]){
WriteableSheet sheet = workbook.createSheet("First Sheett",0);
Label label = new Label(0,2,"A label record");
sheet.addCell(label);

[code].....

But when I compile this file, I get errors telling that package jxl does not exists and so on. Do I need to download it ?

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Java Servlet :: How To Create Files On Server (online)

Jun 5, 2013

I'm making a website with articles (like a blog). I have a webpage called admin.html where you insert the data of the article (title, post etc).

Admin.html calls to a servlet and this sends the information to a SQL Database and it stores and my index.jsp calls to database and show the articles.

This works perfect, and a non-programmer can insert new articles. The problem is that I need to create an .html file for every article/post and save it into my server online.

For example if I create "CoolArticle", I need the file "CoolArticle.html" and save it in my hosting.

How I can do it? I never have seen examples online, all were local, so I can't continue.

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Create Multiple PDF Files And Open Them At Once From Java Application

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I am using itext to create pdf files , i have filtered some records (preferably i can say around 90) which has the option to open pdf for individual record. Now I need to open all the pdf's of filtered records on a single click , without asking for a open dialogue box. How to go about this ??

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Error When Trying To Write Files?

Feb 16, 2015

I'm trying to write information into a file using PrintWriter. The program complies correctly but when it get's to the following part of the program, an error is given. "Exception in thread 'main' java.io.FileNotFoundException" What is wrong with it?

System.out.print("Enter the filename:");
filename = kb.nextLine();
PrintWriter outputFile = new PrintWriter(filename);
outputFile.println(balance);
outputFile.print(item1+" "+item1Price);
outputFile.println(" "+item1Quantity);
outputFile.print(item2+" "+item2Price);
outputFile.println(" "+item2Quantity);
outputFile.print(item3+" "+item3Price);
outputFile.println(" "+item3Quantity);
outputFile.close();
System.out.println("Data written to the file.");

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How To Write Diff - Comparing Two TXT Files

Jan 6, 2014

I have to write a diff which will compare two txt files, diff have to return changes and additional lines in console with indicating in what file and line.

Example:

File1:

This is war

on the front.

Flying is cool.

File2:

This is war

on the beach.

Something here.

Flying is cool.

Result of this should be:

Changed lines:

line2/line2 - on the front./beach.

file1 line2 on the front.

file2 line2 on the beach.

Additional lines:

file2 line3 Something here.

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How To Write Stuff Into Text Files

Oct 28, 2014

I'm refitting a snippet of code I found on the net to write stuff into text files. After a bit of fiddling, here's what the code looks like in one of my classes:

public void addItem(String Item){
try{
Writer out = new OutputStreamWriter(fos, "UTF8");
out.append(Item);
out.flush();
// out.close();
}
catch (IOException e) {
System.out.println(e.toString());
}
}

The original snippet included the close() method. However, when I tried to do a test run writing multiple lines, I'd get an IOException about the stream being closed. I removed the close() method line, everything seems to work the way I want it, but I just wanna know if there's anything I'm missing out on by not having the close() method anywhere, especially when the IDE finds it important enough that it lit a warning about the stream not being closed somewhere as I was repurposing the original snippet.

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Dec 10, 2014

I'm trying to use graphics for my programs and here I'm trying to write a program that searches through files for text received from a JTextField. However, it does not seem to be working as my message is not displayed when text is found...

I used applet. Here are the functions:

JTextField jtf;
JFrame jf;
public void init()

[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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Apr 21, 2014

I got a question in my last interview, its all about multithreading, interviewer asked me to write a program, to write the contents of three files(F1,F2,F3) in to a new File F4, using multithreading , first thread should read the first file and second thread should read second file, so the File F4 should contain F1's contents in first then F2's contents after that etc. I tried to give my best shot, but i couldn't get a way to ensure that the first thread is reading the first file and write to F4 then second thread reading the second file and writing once first file is written completely into F4 and so on ..how to do this?

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Jan 8, 2015

I'm supposed to write a computer based testing program using files. I have started writing however, I am stuck. I am to prompt the user to enter the file name 'test.dat" and if something different is entered then a error message should be displayed. Also the file will create an input stream for the data using the file. I am to have the user enter other information about an employee and then write the record to the file.

The program should be created so when the user enters "quit" the loop is terminated and the file is closed. I'm not asking for code. I was just giving a brief synopsis of the project. Where I am stuck is I wrote the first part of the program that creates the file; however when I enter a wrong file name the exception error message does not display. The code is below:

import java.io.*;
import java.lang.*;
import java.util.*;
public class Project5Write
{
private Formatter x;
public void openFile(){

[Code]...

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Apr 21, 2015

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I have written the below code in which xml and excel file name are hardcoded. The format of xml file is same.

package xmlexcel;
import org.apache.poi.hssf.usermodel.*;
import java.util.ArrayList;
import java.awt.List;
import java.io.*;
import java.util.ArrayList;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.xml.sax.SAXException;

[Code]...

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Jan 13, 2015

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Jun 22, 2014

I want to create a simple console account application that allow's you to create accounts and the accounts will be save in a txt files.

Code:

package main;
import static java.lang.System.out;
import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

[Code] ....

My problem: Every time a new account is created all previous accounts will be deleted because I use: u.println(""); and p.println(""); How can I fix this problem?

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Aug 2, 2014

Write a program to create an integer array of size 20. Then, the program should generate and insert random integers between 1 and 5, inclusive into the array. Next, the program should print the array as output.

A tremor is defined as a point of movement to and fro. To simulate it, the program will generate a random number between 0 and 19, which represents the location in the array (i.e. index number). Then, the 3 numbers to the left and right of this location should be reset to the value 0. If there isn't 3 numbers to the left and right you may assume a lesser number depending on the boundaries of the array.

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A sample run of the program is shown below:

Sample output #1:
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-I've also refreshed my project after each change in eclipse

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Here is the line giving me trouble

Scanner file = new Scanner(new File("mfq.txt") );

Where my code is wrong/where I should put my file? :tax:

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Java Code:

Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection con = DriverManager.getConnection("jdbc:odbc:MYDSN","system","tiger"); mh_sh_highlight_all('java');

I cannot do this in an interface since only abstract methods exist there. I tried to create an another class file to extend it but my program is already extending other class i.e. javax.swing.JFrame..How can i implement this ? just by creating the object of that class in main method ?

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Apr 25, 2014

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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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I have written a program (DOM Parser) that parses data from a XMl File. I would like to create an individual file with the corresponding name for each set of data parsed from the xml document. If the parsed output is Single, Double, Triple, I would like to create an individual xml file (Single.xml, Double.xml, Triple.xml)with those corresponding names. How do I create the xml files and give each file the name of my parsed data output?

import java.io.IOException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;

[code]....

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I have written a program (DOM Parser) that parses data from a XMl File. I would like to create an individual file with the corresponding name for each set of data parsed from the xml document. If the parsed output is Single, Double, Triple, I would like to create an individual xml file (Single.xml, Double.xml, Triple.xml)with those corresponding names. How do I create the xml files and give each file the name of my parsed data output?

import java.io.IOException;import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;import org.w3c.dom.Element;

[Code] ....

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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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Create New File / Ask User To Write In It / Save Finally Print Content Of File

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]....