i am newbie to servlet and m working on a project like online shopping. I have list of data items in my database and i am able to fetch and display the data from database but i want to know that how can i store these data items in ServletContext so that i can use use it frequently in other pages.
I want to create a quiz in java in which questions and options will be retrieved from mysql database.I want the options to be in drop down list format.And I am using jsp for presentation layer and all the connections with database are in java..how to retrieve the options from database to drop down menu...
This is the first time we are using 2 different classes. This is the code I have so far. What I am having trouble is doing the calculations and storing the value into the planet the user selected and keeping it going. I will attach the instructions ....
public class FakeGravity{ // Instance variables private String planet; private int VelocityDecay; private double BouncinessFactor; // default constructor public FakeGravity(){
I have a fixed list of 20+ values to be populated in a dropdown. The set of values are always going to remain the same, no future scope of modifications, additions or deletions.
Listing each of them as <option> in JSP is making the page look cluttered. Or is it better reading it as a comma-separated string from a properties file and then iterating to populate the dropdown.
What will be the best approach to populate such a dropdown in JSP?
Is it possible to get the list/ values in html/jsp from servlet?
I have a table inside an html/jsp page and when the user clicks a button I need to refresh the whole page with some additional text message.
Currently what I am doing is that I am using a java bean for the jsp page that contains a list of values inside the table then store it in session but I think there is a better way without storing it in session.
I tried using request.getParameter() but it only returns string.
I am doing project on glossary in java. Basically what i need to do is, i have a case study in the text field, when i mouse over the certain text that i already store in database. The text will be highlighted and automatically display the tool tip and content the data that i stored in my database.
There are 8 JCheckboxes, which are already added to panel and aligned in group layout. From which, I have selected one JCheckbox. Then the resultant GUI should contain only remaining 7 JCheckboxes and selected one should temporarily removed or hide from GUI . Is it possible? If so, how?
I am new to java. is there any possibility to store parse tree in database such as mqsql, oracle, etc. My requirement is [URL] ..... I found some code about generating parse tree. my next step is store that tree in database.
Now I want to store the image displayed in the jlabel into the database(oracle).From the above code I dont know how to get the absolute path of the images.
Am doing a JSP project for maintaining the details of the interview candidates so now I want to know "How to read the contents of the resume and store in the database"
I am trying to develop a new web application which takes in data from a form and stores data in a database.I have included all the three files join.jsp(the form which takes in data),reg.java(servlet) and JavaConncetDb(method which connects db and servlet). I get a 404 error when i try load the web application.
My file structure in eclipse
The error I am getting
join.jsp <%@ 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">
Write java codes for the following LinkedList base program:
The program should have following three classes:
Node.java , Polynomial.java, Project1.java
A one-variable polynomial of degree n is an arithmetic expression of the form:
a0+a1 x+a2 x^2+..........+an x^n
where a0 a1,a2, ......, an are the coefficients. Design and implement a class named Polynomial that uses a singly-linked list to store the coefficients (so there is virtually no limit on n ). Include a method that adds two polynomials and another method that multiplies two polynomials. For example, the following two polynomials
2 + x^2 - 3x^3 and 1 - x - 2x^2 + 3x^3
are represented by 2, 0, 1, -3 and 1, -1, -2, 3, respectively. The sum of these two polynomials is
3 - x - x^2
which is represented by 3, -1, -1; and the product of the two polynomials is
2 - 2x - 3x^2 + 2x^3 + x^4 + 9x^5 - 9x^6
which is represented by 2, -2, -3, 2, 1, 9, -9.
Note that you must write your code to maintain and manipulate the linked list data structure (i. e., do not use a utility library such as java.util.LinkedList). Email one week before the due date to get a data file to test your program. The data file will contain several pairs of polynomials. Each polynomial is given on a separate line (with coefficients separated by space instead of comma), and there is an empty line between two pairs. Your Java program should read and echo each pair of polynomials, compute and report their sum and product, and go on to process the next pair until the end of input. Specifically, the main method must look like:
while (not end of input) { read and echo a pair of polynomials P1 and P2;
output sum (P1, P2); // Static method returning a polynomial output product (P1, P2) // Static method returning a polynomial }
Hand in a program listing with clear internal documentation and a printout of the results of execution using the test data file. Also email all JAVA program files (Node.java - the same as the one given in class except for the element field that becomes int type for this project, Polynoial.java, Project1.java) so your work can be easily recompiled and tested.
Data file will be like: coefficients of polynomials, not exact, just for as an example of
(The data file will contain several pairs of polynomials)
2 3 0 1 -3
1 -1 -2 3, 9
Output will be in same format with sum and product: coefficients of polynomials, not real, just for as an example.
I want to store an image/file into oracle database using jsp.
I have written code to store data when am running in my machine it is working fine, but not working in server throwing an error saying that "The system cannot find the file specified."
I want to create few forms in our project. I searched in web, All are PHP form Generator only not for any JSP. I could see one JSP form Generator Site. But the Content will store it in their Server. How to create Feedback form in JSP which will store the Data in Database directly.
Write a java program to store employee information in a linked list, the program should implement the following functions:
The program should display the list of functions, and ask the user to enter the number of function that he/she wants to do, then perform the function as it is required in the previous table.
import java.util.*; public class Employee { Scanner in = new Scanner(System.in); String Name; String Address; String Department; int ID; int Salary;
[code]....
this is my out put
Please choose a number: 1-Add a new employee 2-Update employee's info 3-Remove employee's info 4-Exit 1 Enter name: Enter address: 2 Enter department: 3 Enter ID: 4 Enter salary:
now:
1- why are not my adding coming out in the output only the Enter name & Enter address ??
2- how can I add names and ID's and information to test that program
If I change the servlet and have "request.getRequestDispatcher("/pages/ViewCompletedWWDocs.jsp").forward(request, response);" un commented, I get exception "java.lang.IllegalStateException: Cannot forward a response that is already committed".
I'am new to java, this question may have been asked earlier but I'm not getting the exact answer.I want to add data from database into at and display it through jsp. But empty or null values is shown i.e no data is being displayed and when I execute the same sql query which is used in code in sql server then required output is displayed. My java code is:
Java Code:
public List < Alarm_Bean > get_Count(String system_Name) { if (system_Name.equals("MPS")) { try { con = getConnection(); stmt = con.createStatement();
I need to implement an editable JComboBox. It should display a list of rivers from a database. However since the number of rivers is very large, the entries must be dynamically filled after the user has typed in three or more letters.
I have tried to solve this using a KeyAdapter. Everythings works. However after the user has typed in three characters, these three characters are selected in the Combobox. Of course when the user continues to type these chars will be replaced. I have so far not found a solution to deselect the characters and place the cursor at the end.
this.fliessgewaesserComboBox = new JComboBox<UisFliessgewaesser>(); this.fliessgewaesserComboBox.setEditable(true); this.add(this.fliessgewaesserComboBox, c); FliessgewaesserSuchenKeyAdapter fliessgewaesserSuchenKeyAdapter = new FliessgewaesserSuchenKeyAdapter(this); this.fliessgewaesserComboBox.getEditor().getEditorComponent().addKeyListener(fliessgewaesserSuchenKeyAdapter);
My jsp page needs to have a dropdown box. on selecting one/more than one values from this list, the same values get populated in another one.. we have a delete button too , it allows to populate the second box again.
The thing is i am to avoid scripts and use custom tags as much as i can...
I want to create a dropdown menu with contents from a database. You can see my Code in the attachment. It does not work, but why? I have a dropdown-symbol, but no contents.
I have a a hashmap in request attribute which is available to jsp file where i have a dropdown. Hashmap kay= value of this dropdown. As and when I select CLT i want to perform some opertation depending on value associated with that key in hashmap.
