I am trying to save the data a person enters to a file. See code below. It is compiling however the file created only shows largest =89, i want the file to show all the data a person enters.
import java.util.*;
import java.io.*;
public class LargerOfThree3{
public static void main(String args[]){
Scanner in = new Scanner(System.in);
[Code] ...
I am learning FileIO and I am having an ArrayIndexOutOfBoundsException for the following code and I am unsure why...
import java.io.*;
public class ArrayWriter {
public static void main(String[] args) {
PrintWriter fout = null;
int[] data = new int[10];
for(int i = 0; i<data.length; i++) {
data[i] = (int)(Math.random() * 101);
[Code] ....
I was able to create the txt file. How to get it to output my code. I know it's an object and it is a way to save data.
package multiplicationFile;
import java.util.Scanner;
import java.io.*;
public class Multiplication {
public static void main(String args[]) throws IOException {
PrintWriter outF = new PrintWriter("multiplications.txt");
[Code] ....
I have created this project and want to be able to add new members to my members arraylist, store the input in a .txt file and load the new members after closing and opening the program.
[URL] ....
How to save a date entered by the keyboard?
View Replies View RelatedSo I'm still learning how to save data using Java. I know that saving data is extremely important when it comes to creating video games.
What I have here is this simple program.
Java Code:
import java.util.*;
import java.io.*;
import java.lang.*;
public class Character
{
private Formatter x;
private int roomNum;
private boolean[] visited = new boolean[10];
[Code]...
I'm trying to make sure that after I exit the program, joe starts in room 4, not room 1, and that he has visited rooms 1, 2, 3, 4, and 10. I have the save data created, but how do I save an array of boolean values?
I have a simple project to save data to the database. I have successfully mapped the java class with the database table. The code displays no error, it runs very well but it does not save to database, instead it catches an exception and prints out "saving failed". The database is a mysql database.
This is the managed bean code. Save.java(name=bean)
//imports
@ManagedBean(name="bean")
@RequestScoped
public class Save {
private String username,password,msg;
Session session = null;
Transaction transaction = null;
//GETTERS AND SETTERS
public Save() {
[Code] ....
This is a screenshot of my Hibernate configuration file : hb.jpg
I am trying to make a program where a user can enter guests name for a hotel, the JTable includes rows for the name of the tenant, the room number, month etc.
I've made the table, however I am having some trouble in saving the data that I put into the table. I used jtextfield and a jbutton to but data into the jtable. I am trying to save the data, and load it just buy clicking a button.
table.setModel(new DefaultTableModel(
new Object[][] {
},
new String[] {
"Room", "Name", "Month", "Payment"//table rows
}
));
This is my basic table. And what I'm trying to do to save the data is:
DefaultTableModel model = new DefaultTableModel();
private JFileChooser myJFileChooser = new JFileChooser(new File("."));
private void saveTable() {
if (myJFileChooser.showSaveDialog(null) ==
JFileChooser.APPROVE_OPTION ) {
saveTable(myJFileChooser.getSelectedFile());
[Code] ....
When I run my program, I'm able to click on a button, and the dialog box will appear, I'm also able to save the data to a file. However when I click on the retieve data button I made the dialog box opens, the file is there, however when I click it, nothing happens.
I have created this project and want to be able to add new members to my members arraylist, store the input in a .txt file and load the new members after closing and opening the program.
[URL] .....
The Table Model
package presentation;
import java.util.List;
import javax.swing.table.AbstractTableModel;
import javax.swing.*;
import javax.swing.table.*;
import java.awt.*;
import business.*;
public class BgTableModel extends AbstractTableModel
[code]....
I've tried everything but in vain..I want to save the data from the table into the database, I can easily connect to the database. All I want is how to get the values from the table. I've tried this method to get the values but its not working because of the contructor error in the BgTableModel class.
Tried Method
public void writeBgEdu() {
int last=gtm.getRowCount();
System.out.println(last);
for( int i=0;i<last;i++) {
if(((String) gtm.getValueAt(i,0))!=null)
[Code] .....
How can I save an expression like (a & b) | C | D | (e & f) in oracle. And how how can i retrieve that in java.
a , b , c , d are some values.
We are currently trying to use the "confirm" button on our GUI as a fully functioning feature that saves the data input into a database. Here is the code for the GUI we have created...
We are trying to save some details of users for a database.
I've attached our work in zipped folder as i couldn't upload a thread with some many "URLs" .....
package com.example.imc;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
[Code] ....
I have a file that has the following text in it:
# Main configuration file for DEDServer
# Starting resource values
startingGold=1000000000
startingElixir=1000000000
[Code] ....
Everything compiles but doesn't work like it should. What the idea is, is to be able to add class personnel objects and have them saved in a file, so that later on i would be able to see them.
Back to my problem: When i create a new "Personnel" and try to run Write and read, to see if my new "Personnel" is added to the list, it's not there at all... what do i do wrong?
import java.io.*;
class Personnel implements Serializable
//No other action required by Serializable interface.
{
private long payrollNum;
private String surname;
private String firstNames;
[Code] ....
I get a Base64Encoded image string (GIF format) from an external system. While reading the byte array and saving the image to file, the image gets saved in landscape orientation. The code snippet is below.
String image = "R0lGODdhCAcgA=";
Base64Coder decoder = new Base64Coder();
byte [] decodeBytes = decoder.decode(image.getBytes());
ByteArrayInputStream stream = new ByteArrayInputStream(pngArray);
BufferedImage bImage = ImageIO.read(stream);
File label = new File("C:/labels/test.gif");
ImageIO.write(bImage, "gif", label);
I want to save the image in portrait orientation. Is there a way to do that?
My code's not working and I don't know why. I'm trying to read numerical values from a file and saving all instances where a letter is entered instead of a number to a string to be referenced as an error at a later point on in the code. However, there's an error and like I've stated before, I don't know what caused it.
public static void validateData() throws IOException{
File myfile = new File("gradeInput.txt");
Scanner inputFile = new Scanner(myfile);
for (int i=0; i<33; i++){
if(inputFile.hasNextDouble()){
double d = inputFile.nextDouble();
if (d<0||d>99999){
[Code] ....
This is the error that returns.
Exception in thread "main" java.util.NoSuchElementException
at java.util.Scanner.throwFor(Scanner.java:838)
at java.util.Scanner.next(Scanner.java:1347)
at Paniagua_Grading.validateData(Paniagua_Grading.java:29)
at Paniagua_Grading.main(Paniagua_Grading.java:6)
JFrame parentFrame = new JFrame();
File f12=new File("E:
ewfile.txt");
JFileChooser fileChooser = new JFileChooser();
fileChooser.setSelectedFile(f12);
fileChooser.setDialogTitle("Specify a file to save");
int userSelection = fileChooser.showSaveDialog(parentFrame);
[code]....
I want to save selected text file as html file in target directory....
I'm trying to save a picture from byte arrays using RandomAccessFile. The file appears but doesn't open (like its corrupted).
I'm using the bittorent protocol which gives a SHA-1 hash that I compare all the bytes with to verify the data. All the bytes pass the hash check and all the hashes are checked. So I'm pretty sure I'm getting all the bytes correctly.
Is there anything I can do that could tell what's going wrong?
public RUBTClient(final TorrentInfo2 tInfo, final String outFileName) {
...
this.outFileName = outFileName;
File destined = new File(outFileName);
try {
destined_file = new RandomAccessFile(destined, "rw");
destined_file.setLength(tInfo.file_length);
} catch (FileNotFoundException e1) {
[Code] .....
I am simulating a game. This involves creating two Player objects(either HumanPlayer or ComputerPlayer), a TheBoard object, a TheGame object and a TheGameManager object. In the TheGameManager, i am trying to get it so that i can save the two Player objects, the TheBoard object and the TheGame object in current use at some point in the game and then load them later at some point. However, after debugged, i have found that it doesnt like the writeObject() method and skips and sends an exception up.
My TheGameManager class has the following fields:
public class TheGameManager implements GameManager {
private Player player1;
private Player player2;
private TheBoard currentBoard;
private TheGame currentGame;
//private String[] args;
private int iterations = 1;
[Code] .....
Logic her eis when user selects option1, it asks for user to enter name and as soon as user enters name, it should compar name to existing names in txt file. I have user while loop and for loop but for some reason, it doesnt compare properly as there seems to be some mistake in looping and it just read first line or you can say single line rather than comparing it with all lines in txt file. i have attached votes.txt file with this. Also, if user doesnt exists infile, it will ask user to enter vote as yes or no and add it to file and then count total number of Yes and No votes from file and compare them.
my votes.txt file looks as below with two columns namely (name and vote).
Hiren No
samir yes
bob no
rikul no
master yes
patrick no
summer yes
bhanja no
package samples;
import homework.EmployeeA;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Scanner;
[code]....
I would like to understand how does multipart/form-data works during file upload scenario's, Does it chunks the data from client to server while transferring the files ?
View Replies View RelatedBy using FileReader, FileWriter and their constituents, I am creating a file to contain employee information ( name, age, hours, etc. ). The user is to input all of the data on a single line and we were asked to implement StringTokenizer to assign that data to the file. I have never used the StringTokenizer before, but I have a rough idea how it is to function. I used pw.println to test what I have so far, now I would like to let the user build the initial file with the "first employees" of the company, and then view the file, and then go back and append new employee data to that same file. My question is, how can I take the user input as a StringTokenizer and add that to the file?
In the for loop below, I thought I would see if it would work, but it does not. The loop only executes once and does not allow me to enter data.
public class Records {
public static void main(String [] args) throws IOException {
Scanner input = new Scanner(System.in);
FileWriter fw = new FileWriter("dbs3.java");
BufferedWriter bw = new BufferedWriter(fw);
PrintWriter pw = new PrintWriter(bw);
System.out.println("NEW EMPLOYEE DATA SHEET");
System.out.print("Number of new employees: ");
int number = input.nextInt();
[Code] ....
I am trying to remove a line based on user input. myFile.txt looks like:
Matt
Brian
John
However when I enter "Brian" (to remove this line), It is deleted on the temp file (myTempFile.txt), but not renamed back to the original file (myFile).
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Scanner;
[code]....
I am creating a program where it reads the data inside a file and then places this data into arrays. The file I created has numbers 1-30 in it, file named, testing1.txt .
Java Code:
public static void main(String[] args) {
// TODO Auto-generated method stub
// Variables Declaration Section
//******************************
BufferedReader br;
String sCurrentLine;
String str;
[Code] ....
My issue is that the 'str' value is not initialized, but if I initialize it, it ruins the code. I'm not sure what to do in the situation.