How To Write Zip File Like Application
Feb 2, 2014I 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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Write Application That Reads Five Integers
Jun 12, 2014Write an application that reads five integers, determines and prints the largest and smallest integers in the group. Use only the programming techniques you learned in this chapter. (which means: use only if statements and the equality and relational operators).If I want to solve this I will write nested if statements for every probability like the following.The probability: the first integer is the largest and the fifth integer is the smallest:
1>2>3>4>5
1>2>4>3>5
1>4>3>2>5
1>4>2>3>5
1>3>4>2>5
1>3>2>4>5
And so on for every probability.
How To Write JUnit Test Classes For Application
Apr 16, 2014I am working on a class project and I have to write the JUnit test for the GUI class ... what I did wrong ... Here is the code for the GUILauncher:
package edu.oakland.production;
import java.awt.*;
import javax.swing.*;
public class GUILauncher{
public static void main(String[] args){
RetrieveWindow gui = new RetrieveWindow();
[Code] .....
Write Application That Display Numbers 1 To 4 On Same Line
Jul 22, 2007I'm going to be taking an object oriented paradigm using java during intersession in a few months. I'm trying to brush up on it a bit. The problem is. Write an application that displays the numbers 1 to 4 on the same line, with each pair of adjacent numbers separated by one space. Write the program using the following techniques:Use one system.out.printLn statement.Use four system.out.print statement.Use one system.out.printf statement.
This is what i have so far .
Java Code: public class Display
{
public static void main(String [] args) {
System.out.print("1 ");
System.out.print("2 ");
System.out.print("3 ");
System.out.print("4 ");
System.out.println(" ");<----is that what that is supposed to look like, and where it goes?
System.out.printf(" %s %s %s %s ");????
}
} mh_sh_highlight_all('java');
i cant test this my console isn't working right, and i haven't finished my compiler install.
Write A Java Application To Display Layout Of Information In Typical Business Card Order
Jun 25, 2014ABC is a company that designs and prints personal business cards. The company has asked you to write a Java application to display the layout of the information in a typical business card order. Data items in a typical business card include the customer's name, address, city, state, postcode, home phone number, and work phone number.
Write, compile, and test a Java class that displays these data items in a command window. Alternatively, you could also create it using a dialog box. Please include appropriate comments in your class.
Please named your class BusinessCard(LIM).java. (eq. BusinessCardLIM.java)
Create New File / Ask User To Write In It And Save Final Print Content Of File
Mar 15, 20141. 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] .....
Create New File / Ask User To Write In It / Save Finally Print Content Of File
Mar 17, 20141. 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]....
GUI Button Write To File
Dec 8, 2014I 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.
TxT File - Write In Next Line
Mar 5, 2014i 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]....
Using Serializable To Write Everything To A File At Once?
Nov 3, 2014For 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?
View Replies View RelatedHow To Write Java Data To Pdf File
Apr 9, 2014how to write java data to pdf file
View Replies View RelatedGetting Program To Write To Output File?
Mar 19, 2014My 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]....
Write TextArea To File Formatting?
Dec 10, 2014I 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
SimpleFileVisitor Can't Write To Text File?
Mar 7, 2014I 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.
How To Write ItemsInCart List To A File
May 14, 2014Main:
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
Write To TXT File Using Buffered Writer
Sep 22, 2014Trying 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] .....
Read And Write Json To / From A File
Jun 4, 2014I 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?
How To Write Newline In File Using ByteArray
Jun 11, 2014I 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.
GUI Program - Read And Write To File
Oct 17, 2014I'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] ....
Read XML Files And Write To TXT File
Jul 25, 2013My 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] .....
Null Pointer Exception When Trying To Write To File
Aug 14, 2014I'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.
Write And Read Via ArrayList With Text File?
Feb 6, 2015I 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.
How To Write A Dot File That Prints Graph In Java
Dec 6, 2014Let'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");
Read Three Files Using MultiThreading And Write Into A New File
Apr 21, 2014I 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?
View Replies View RelatedWrite Same Data To Stdout And To Save File
Apr 11, 2014I 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.
Read Excel File - Write To Wordpress
Jan 10, 2014What i basically do is that i read the information of what course that needs to be updated with a new course date and then i log into the wordpress page and navigate to the course and add the date.
I need the java program to be able to do these following actions.
1. Open a webpage
2. write to a form
3. click a button
4. search for a text on screen
5. click on a specific place on the screen/click on a link
6. read from an excel file.
and so on...