I want to create a online examination system.i want to know to how to get questions 1 by 1 on the same jsp page and on clicking the submit button the result should be saved in database.
View RepliesHere's my code for a button that add values into an empty database.
The program skips system.out.println("1");
And the database is still empty. I can't figure out why
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
String url = "jdbc:mysql://localhost:3306/xxxxxxxxxxxx";
String driver = "com.mysql.jdbc.Driver";
String user = "xxxxxxxxxxxx";
String pass = "xxxxxxxxx";
[Code] .....
The class gets complied but when I run the program the submit button doesn't work, how do i get that to work?
/**
* Orchestration class for Account
*/
import java.awt.*; //Importing the java.awt.* class
[Code].....
The class does get compiled but the submit button doesn't work?
/**
* Orchestration class for Account
*/
import java.awt.*; //Importing the java.awt.* class
import java.awt.event.*;//Importing the java.awt.event.* class
import javax.swing.*;//Importing the javax.swing. class
public class AccountDemo extends JFrame
{
/// initializes the variables in the container
[Code] ....
as there is a button on the website, that I need to click, but it returns a number using javascript that will access the page. Without that number, accessing the page won't work. Therefore, either I need to click the button, or return that data when I access the url. Here is the line in the html.
<a href="/missions.php?jid=11&cat=2&formNonce=49af09362db790 a6b364401c4ea52a08b515df4a&h=284e4fe4946e6fb8af3a6 62f4583454eebc8bd23" class="actionButton" onclick="return fsb11('5494');">Do It</a>
make this button:
look more like this one:
I'm using GridLayout for my main JFrame.
I am writing code for a form in which i want to display data by selecting radiobutton.The code is working for single radiobutton but it not work when i select the other radiobutton.
Capture.PNG1.jpg
the code is given below:]
private void jRadioButton1ActionPerformed(java.awt.event.Action Event evt) {
// TODO add your handling code here:
int LIMIT = Integer.parseInt(jTextField2.getText());
int ULIMIT = Integer.parseInt(jTextField3.getText());
{
DefaultTableModel model = (DefaultTableModel)
jTable1.getModel();
[code]....
Trying a simple form with a text field and a submit button; the text field should start with zero and increment by 1 every time a user clicks it.
My HTML
<html>
<body>
<h2>JSP Counter</h2>
<form method="post" action="counter.jsp">
<input type="text" name="integer" value="0"/>
<input type="submit" value="Add 1" />
</form>
</body>
</html>
My JSP<%
String param = request.getParameter("integer");
try {
int i = Integer.parseInt(param);
i ++;
} catch (Exception e) {
}
%>
Connection conn = null;
ResultSet rs = null;
PreparedStatement pst = null;
[Code]....
Everything is working great except for my back button at line 172. It works good but if I try to click the "insert" button again. It gives me the java.lang.NumberFormatException error. Other than that it works fine, the "insert" button still works.
package userDatabasePack;
import java.sql.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class Database{
//Variables
private String username2, insertUser, insertPassword;
private int insertUserId;
[Code] ....
I have created a gui which accepts username in the text field and once clicking on submit button it fetches user details and throws it on gui via JTable.
But when i click submit for the second time using different username the background process goes well and good the vector that i pass to jtable changes with new data but the values in gui still contain the old data.
I am getting Web Page Expired error while clicking the back button of the browser, after submitting a form. The form method is POST. ( I have to keep it that way). I tried this code
<%session.setHeader("Cache-Control", "no-cache");
response.setHeader("Cache-Control", "no-store");
response.setDateHeader("Expires", 0);
response.setHeader("Pragma", "no-cache");
%>
In my jsp. Still it is not working. I also tried
<script language="JavaScript" type="text/javascript">
window.history.forward(1);
</script>
In my code where the Button Action Performed is created, I have done the following to ensure that the visibility of the JTable and JScrollPane have been set to true. But it does not work?
Code below:
private void RunQueryButtonActionPerformed(java.awt.event.ActionEvent evt) {
jScrollPane2.setVisible(true);
table_001.setVisible(true);
try {
PreparedStatement st =conn.prepareStatement(SQLTextEditor.getText());
ResultSet rs = st.executeQuery();
table_001.setModel(DbUtils.resultSetToTableModel(rs));
table_001.setAutoResizeMode(table_001.AUTO_RESIZE_OFF);
[code]....
In a form i used <h:commandButton> i called a Javascript function. Though the function returns false , form is submitted and action method is called. I used like this
<h:commandButton onclick="test();" action="{#bean.menthod}">
test- javascript method returns boolean value false.
Above doesn't work. Below mentioned code alone worked. I want to know why
<h:commandButton onclick="if(test) return true;else return false" action="{#bean.menthod}">
I have done 90% of the coding however i am stuck with producing the output, i just cant get the user fields to show.
I have attached a picture of the output that is required. The program consists of two classes i have attached the database class, and have inserted my coding below.
import java.sql.*;
import java.io.*;
import java.util.*;
public class QueryDB {
private Connection con = null;
String userID,
[Code] ...
Attached image(s)
I have to get my output to show as per the image attached i am very close but not there yet. I have also attached the database where i extract my information from
/*
Program Name: QueryDBDB.java
Purpose: to build an initial database for the stocktrakcer application
*/
import java.sql.*;
import java.io.*;
import java.util.*;
public class QueryDB
{
private Connection con = null;
String userID,firstName,lastName,name,symbol;
public QueryDB() throws Exception
[Code] .....
Attached image(s)
here is the code,
ResultSet rs = result.executeQuery(selectsql);
int columns = rs.getRow();
while(rs.next()){
[Code].....
I can print out the result correctly, there are three rows of result from the database, but they are shown in one row on the browser, how could i show the result one row after another to let it looks pretty?
I am trying display the result set from the database.I am getting the following exception :
Caused by: javax.servlet.jsp.JspTagException: Don't know how to iterate over supplied "items" in <forEach>
at org.apache.taglibs.standard.tag.common.core.ForEachSupport.toForEachIterator(ForEachSupport.java:286)
My Jsp code :
<%@ 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">
[Code] ....
I am learning how to program in JAVA servlet+MySQL. Decided to make a simple program where it shows who is celebrating birthday today by retrieving data from database. At the moment I managed to get it working by loading a form.html and pressing the button in it which gets to the result.jsp and shows results there.
My plan was to get a list of people who are celebrating there birthdays initially when the website is loaded/being loaded, I mean when you enter URL into your web browser and you get it instantly in browser. Is there a way to do it the way I want (JAVA+servlet+MySQL) instead of pressing a button/link?
My query retrieves more than 5000 records from Oracle database. I want to display the records 100 per page. I know it is called pagination. Any detailed styp-by-guide or tutorial or example available?
View Replies View RelatedWe 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" .....
Enable Radio Button Based On The Value Selected From Database ????
View Replies View RelatedI have jFrame where I have to display data from database on button click. There are 4 buttons, first to display the first record in database, last to display the last record in database, next to display the next record and previous to display the previous record. I have done first and last record but what should I do to display the next and previous record.
View Replies View RelatedI am developing my first Java application and the database I use is MySQL. I have created two separate buttons; one to insert new data into my database and the other to update the database when changes are made.
Each button is working perfectly, but I now want to combine both functions into just the save button. Thus, whether I am entering new data or modifying existing data, the save button should use an IF ELSE condition to decide whether to use the INSERT or UPDATE command.
My problem is, how do I write this IF ELSE statement? What should be the condition? For example;
IF(what? ){
String sql ="Insert into Table1 (classID,className,counselorID,startDate,endDate) values (?,?,?,?,?)";
}ELSE{
String sql2 = "update Table1 set classID = '"+value1+"',className='"+value2+"',counselorID='"+value3+"',startDate='"+value4+"',endDate='"+value5+"'
where classID = '"+value1+"'";
}
I have saved emails that are stored in to text files and I want to retrieve the Sender, Reciever, Subject and the Email Content.I am using From: as a delimiter and To: as a delimiter and Subject as a delimiter and I am not sure what delimiter I should set for the email content.Also, there can be emails that will have comments after the message content and I plan on using the delimiter Comments:.
Any example of what delimiters I should use it would be great. Also I would like to know how check whether or not a delimiter exists so that I can print out the comments if it exists and if the file does not have comments, it prints out nothing.
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
[code].....
I've a vertical-bar-delimited file where most elements contain text, some contain whitespace, and some are empty. Examples:
62RG|fe|Pencil Financial Group, LLC||doug@pencil.com|||85637889|Cross, Ben|bcross@godaddy.net|Bernard|Cross|Ben||315 One Tree Hill Terrace|Lafayette|LA
62RG|fe|Pencil Financial Group, LLC||tracy@pencil.com|||13658734|Dustin Cardwright|dcart@motorola.com|Dustin|Cartwright|||| |LA
which I parse and store with
String str_arry = innline.split( "|", 17);
lisst.add( new Contact( str_arry));
and my Contact class has the constructor
public Contact( String[] str_arry) {
for( int ii = 0 ; ii < str_arry.length ; ii++ ) {
if( str_arry[ii].matches("^s+$")) {
str_arry[ii] = null;
System.out.println("hit a null");
[Code]...
I expect the for-loop in the constructor to find any elements containing whitespace characters and set them to null for subsequent assignment.And when the code runs I do see some hit-statements pop up, so the detecting part is working.
But when I then process the list and access a Contact object and test fields for nulls I don't find any ie
if( aContactObj.getfFCity() == null) System.out.println("city is null");
never prints when it should.
What's the trick? Or is my approach wrong and if so what should it be?