How To Create PDF File While Working In Java
Feb 22, 2013how to create pdf file while working in java.
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Create Jar File Programmatically Not Working?
Nov 11, 2014Why is my create jar file programatically not working? So doing this does create a jar file. When I run the jar file via command line, it gives me "Could not find or load main class ...". I'm not sure exactly why. I took some code i found here: java - How to use JarOutputStream to create a JAR file? - Stack Overflow and apparently it didn't specify the main class so I specifically added it myself. am i doing something wrong? And btw, the file (that contains all the class files) do not have any directories in them. so it's essentially just one folder with a bunch of class files in there. below is the code.
I had the commons-io-2.4 jar referenced into my build path that can be downloaded here: Commons IO - Download Commons IOreason i guess i added to that, though i'm not sure if it was necessary or not, was because it has a file filter which can tell which files are hidden or not and thing is without it it was adding like DS_STORE(which is hidden and i guess unnecessary) to the jar. not sure if this logic is right but just letting you know.
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileFilter;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.jar.Attributes;
import java.util.jar.JarEntry;
import java.util.jar.JarOutputStream;
[Code]...
Java Database Embedded Exe File Why Not Working
Jul 7, 2014I have written my whole java code in netbeans IDE and create database in MYSQL work bench and connected java Gui with this DBMS through requried driver.when i run this program from Netbeans IDE , my program successfully access the data from DBMS. But when i created this java gui exe file its not working and not accessing data from DBMS, and each times gives exception "Driver not found ".if there is no driver loaded in this program how this file is working when i run this file from netbeans .
View Replies View RelatedHow To Create Excel File In Java
Mar 30, 2014Attached Images
File Type : 10.jpg (21.9 KB)
Create And Write To A Excel File From A Java Program?
Jul 10, 2007I 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 ?
Create A Java File That Will Print Out Temperature In Fahrenheit?
Jan 11, 2014I am trying to create a java file that will print out the temperature in Fahrenheit. This is my code.
import java.util.Scanner;
public class TemperatureConverter {
public static void main(String[] args) {
float temperature;
Scanner in= new Scanner(System.in);
System.out.printf("Enter temperature in degrees Celsius: ");
temperature = in.nextInt();
//Getting a red X next to this line.
fahrenheit = temperature * 9/5 +32;
//Add this line
System.out.printf(+temperature + " degrees Celsius is " + fahrenheit + " degrees Fahrenheit.");
//System.out.println(temp1 + " degrees celsius is " + fahrenheit + " degrees Fahrenheit.");
}
}
I need to know what I am doing wrong. Using Eclipse as my platform. I have entered comments where I am getting red X's.
The error I get when I run the program.
Exception in thread "main" java.lang.Error: Unresolved compilation problems:
fahrenheit cannot be resolved to a variable
fahrenheit cannot be resolved to a variable
at TemperatureConverter.main(TemperatureConverter.jav a:24)
How To Create File In Google Cloud Storage Using Java
Feb 26, 2015I am Using NetBeans to develop a Desktop application in Java. I am strong some project related data files in text
format in my local folder(eg: E:securestorage) . I plan to store the same in google cloud . How it can done ..
Create A Java Program That Can Read Specific Data Within Csv File To Work Out Averages
Aug 7, 2014i am fairly new to java but have made a few projects so i do know most aspects that would allow me to complete the task its just i have been stuck at the same place now for 2 days.The project is to create a java program that can read specific data within a csv file to work out the averages etc. The csv file is a database of different weather stats . an example of the first 12 months of the csv file is below..
[CSV FILE]
year ,month,average rainfall etc
1946 15.70.616108.131.5
1946 28.23.56111.871
1946 38.82932.9 102.9
1946 414.16.3029.2 150.5
1946 513.96060.7 143.6
[code]...
I know that once the data is indexed i can than use a double to find the average of the 12 specific pieces of data and so on. once this is complete i should than be able to transfer the data to a simple graph.
Jar File Is Not Working
Feb 25, 2015I have added a Simple Jar file in Eclipse Proect->BuildPath->jar file but class Inside that are not showing in My project this is my Project Structure and I have all ready checked in Order and Export..But jar file is not working.
View Replies View RelatedReading Text File Into Object Array And Create Random Access File
Dec 9, 2014I 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.....
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]....
Creating A System That Will Ask User To Create A File That Will Store To Text File
Mar 9, 2015I 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]....
Read Input File And Create Output With Anagram For Words In File
Sep 24, 2014Well my code is supposed to ask for an input file and then (ex: input.txt), read the input file and create an output.txt file with the anagram for the words in the file. Also it should be displayed on the screen. However my code doesn't display the anagram on screen or the output file!
Heres is the code:
import java.io.*;
import java.lang.*;
import java.util.*;
/* This program will read a file given by the user, read the words within the file and determine anagrams of the given words. If the file that the user inputs is empty, then the program will output "The input file is empty."
* The program will read the file line by line, counting the total number of words read. If there are more than 50 words, "There are more than 50 words."
* will be printed, and the program will terminate. After each line is read, the words in the line will be separated,punctuation characters will be removed, and upper case characters will be switched to lower case.
* If any word is larger than 12 characters, that word will not be considered in the total amount of words in the file and it will not be sorted.
* After each word is read, the letters will be sorted and stored into an array containing each
* word's 'signature'. After all the words have been read, words will be printed to the output file on the same line based upon their signature.
*/
public class Anagram {
//Creating constants for maximum words in file and maximum chars in word
public static final int MAX_CHARS = 12;
public static final int MAX_WORDS = 50;
[Code] ....
JSP :: JQuery Library Is Not Working In File
Dec 17, 2014I am using Spring to develop a web application.I have used JQuery ui in HTML page it is working fine a Dialog box appear with JQuery effect.But When I use the same procedure in jsp it is not working.Here is my code of jsp file
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Login Page</title>
<style>
[code]....
JSF :: 2.2 - Not Working Properly With AJAX And File Uploads
Feb 27, 2014I'm having problems with using the h:inputFile tag with JSF 2.2 and Glassfish 4.0 on Eclipse. The file uploads work when the enctype is set to "multipart/form-data" in the h:form tag, but AJAX will not work. When I leave out the encType (defaults to "application/x-www-form-urlencoded") AJAX works but the uploads do not work, and in fact Glassfish crashes and generates the message:
The request content-type is not a multipart/form-data
Likewise I'm having the same problems with the PrimeFaces file upload tag p:fileUpload. In a JSF 2.0 it works correctly, but with JSF 2.2 it's giving the same problems and generates the message above.
When I start up Eclipse it tells me that Mojarra 2.2.0 is installed. Is this the source of the problem, and if so, how do I install a later version of Mojarra?
Reading Input From Text File Not Working?
Apr 7, 2014public void savePlants(ArrayList flowerPack) throws IOException
{
Scanner input = new Scanner(System.in);
String name;
[Code].....
When I open the saved file the information I need seems to be saved, but when I try to load and search it the data is not there. This is homework that was due about 2 days ago. I just want to get it right in my head for next time.
This is my text file: ¬í sr java.util.ArrayListxÒ ™Ça I sizexp w sr FlowerNÏŠ¨r;¾ Z hasScentZ hasThornsL flowerColort Ljava/lang/String;xr Plant"ô²Ò0¢ I IDL Nameq ~ xp t Roset redsr Fungus “ +) Z isPoisonousL fungusColorq ~ xq ~ t toadstool t brownsr Weed #©éÇÙN Z isEdibleZ isMedicinalZ isPoisonousL weedColorq ~ xq ~ t dandylion t yellowsq ~ t tulip t pinkxq ~ q ~ q ~
Working On A Program That Creates Array From A File
Feb 19, 2015Working on a program that creates an array from a file, organizes it in various ways, and then prints the results. Right now I'm specifically having trouble with the printAry() method - when I try to run it, I receive a NullPointerException for the active line in printAry() (EDIT: line 102). Not sure which sections are important to this, so I will include the client class and most of the service. I realize that the amount of documentation I included is not necessary, but it is required for the class.
class Lab3StudentAryService
{
private int count;
private Lab3StudentData [] studentAry = new Lab3StudentData[50];
/*
@param: none
@return: none
reads file and converts to array.
*/
public void fillAry() //constructor
{
Scanner scan = new Scanner(System.in);
[code]....
How To Create Jar File Of Program With Text File
Jan 29, 2015i have made one desktop application with swing and i have uses one textfile (File) in it. i want to handover to another friend to use it . How to create jar file of that program with that text file so that my friend use it without any issue . I have made it in NetBeans
View Replies View RelatedJava SetProperty Not Working
Apr 17, 2015I have a file called config.dedserver and on a JButton click I am editing the values in it using setProperty but it didn't work. It removed everything from the entire file and then added the properties.
This is my code:
String newGems = gem.getText();
String newGold = gold.getText();
String newElixir = elixir.getText();
String newDE = de.getText();
try {
Properties props = new Properties();
props.setProperty("startingGems", newGems);
[Code] ....
And this is what the original file is:
Quote
# Main configuration file for DEDServer
# Starting resource values
startingGold=1000000
startingElixir=1000000
startingDarkElixir=1000000
startingGems=1077
# Saving method. Valid values are:
# -none: database disabled
# -h2: use h2 database (default)
saveMethod=h2
# Save interval (milliseconds)
saveInterval=60000
Java Import Not Working In Package?
May 20, 2015I am trying to understand the package and import functions.
The path to access the file " library.book" is
C:UsersKameshDesktopJava SessionJAVAOCA7ooklibrary
and i can see 3 txt files
Book.class
Book.ctxt
Book.java
while compiling i am getting <identifier>expected error.
Here is the code :
package library;
public class Book {
public String isbn;
public void printBook() {}
}
package building;
[Code] .....
The error i get is <identifier>expected.
Java Merge Sort Not Working
Dec 10, 2014I have been working on getting the merge sort working, I have a complteted code but am not getting the right results... Here is my code and the results are "876323149" ...
public class MergeSort
{
private static int[] local; // for use in copying
private static int[] a;
public static void main(String[] args) {
int[] test = {2,3,1,4,7,8,6,3,9};
[Code] ....
Java Game KeyListener Not Working In FSEM
Sep 5, 2014I had a game written in a 500x400 window using JFrame and a threaded JPanel. It used KeyListener to detect user input and worked just fine, problem was it was very click dependent and therefore I wanted to put it into fullscreen mode so I would no longer come across the problem of clicking outside the window and being taken out of the game. But when I ported the game to Full Screen Exclusive Mode the KeyListener no longer seems to be working and I have no clue why. I tried using KeyBindings as well, that code didn't work and is left commented out in the FSEM code.Here is my code for the windowed application:
import java.awt.Container;
import javax.swing.*;
public class Main extends JFrame{
private GamePanel panel;
public Main(){
panel = new GamePanel();
[code]....
Working With Custom JList Component In Java
Aug 21, 2014I am trying to use the JList to display a list of students. Now, each student has a first name, last name and course taken. each courses taken by the student has its' own name, level and idNumber. For now, I am just trying to create my own custom JList model for the students. I have the custom model as well as the button event calling it. Unfortunately, when I click the button to display the student info added, the component is NOT fired up!..
I am not sure what I have done wrong regarding creating the component because I can display the information on the console and the list contains everything I have added but just to display it on the component is NOT working. I have broken the codes into sub classes, you can add the classes to the same package or create sub packages to insert individual classes.
The student class
public class Student {
private String studentName;
private String studentID ;
public String getStudentName(){
return studentName;
[Code] ....
Java UDP Client Server Program Not Working
Apr 18, 2014I am currently writing two java classes (client and server). The client takes an input number form keyboard and sends it to the server. The server then multiplies this number by two and sends it back to the client. The numbers should also be printed to screen along the way, for example if I input the number 3 I should get
"From Client: 3" "From Server: 6"
They should continuously do this unless a negative number is received by the client, say for example the number -3 is sent to the server and it returns -6.
The code I have for the two classes so far is:
import java.io.*;
import java.net.*;
import java.nio.ByteBuffer;
import java.util.Scanner;
class Client {
public static void main(String args[]) throws Exception {
DatagramSocket clientSocket = new DatagramSocket();
[Code] .....
Currently, when I run the program all I get is an output of the number first entered. I am aware it requires a loop but I don't know where and what the condition should be.
Also if I wanted to adapt this so that it would take the integer from client and subtract two at the server and return to client who sends back to server to keep subtracting two unless it reaches a negative number at which point the client will terminate the program - how might I do this.
I do realise there needs to be a while loop in the above code, but I wanted to test it sent the number from client to server and its not doing it. All I get is a print screen of 'enter number' and then the number I enter.
Java Iterate Over Collection Not Working As Expected
Aug 6, 2014I am currently working on a Java project, below are my attempts at coding so far:
public class MyZoo
{
// zoo identifier
private String zooId;
// a number used in generating a unique identifier for the next animal to be added to the zoo
private int nextAnimalIdNumber;
// zstorage for the Animal objects
private TreeMap<String, Animal> animals;
[Code] ....
I currently cannot get the printAllAnimals() method to work as it should.
When executing the method printAllAnimals(), it does not do anything, when it is supposed to use the Collection object c, so that animals stored in the zoo can easily be checked.