Servlets :: Next Button And Retrieving Name Of JSPs
Feb 21, 2014
I want to have a button in my Jsp's labeled "next" that takes me to the next JSP in a certain order. Imagine a book: every time you click next you go to the next page.
Each page is a JSP that is named "page#" where # stands for the number (page1, page2,etc).
I was structuring my app this way: one controller,one controllerhelper,multiple JSPs.
The "next" button in the JSP's would always have the same name as not to overcode in my controllerhelper with too many options for the button that was pressed.
So my idea was to retrieve the name of the current JSP and work the string in order to add a number (page4 turns into page5) and forward it through a requestdispatcher.
That is the problem as I am not able to get the name of the current JSP since the url changes after the first page to the servlet url.
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Nov 16, 2014
I am trying to check to see if the button has anything on it.
Line 81 says incompatible types: JButton cannot be converted to String ')' expected ';' expected
package PA7;
import javax.swing.JFrame;
import javax.swing.JLabel;
import java.awt.*;
import javax.swing.*;
import java.awt.event.ActionListener;
[code]...
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May 2, 2013
I have a HelloWorld.java_:
package com.javapapers.sample.ajax;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
[Code] .....
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Oct 28, 2014
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?
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Aug 8, 2014
How do I retrieve values of an object?
public Software[] getSoftware(int index){
return software;}
The object is initialized and i get no errors when entering values .. but when i try to print by calling getSoftware I get :
[Ldd1318398project4.Software;@257f6796
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Jan 18, 2015
I currently building a hotel reservation system, and I'm having issues with retrieving and setting other values from a JTextField.
What I'm trying to do is to retrieve the value that was inputted into a textfield, and then setting that value to a string in another class.
In here, I'm trying to retrieve values from the JTextField:
@Override
public void actionPerformed(ActionEvent event) {
GuestInfo gi = new GuestInfo();
if (event.getSource()==roomView)
{
roomViewFrame.setVisible(true);
roomViewFrame.setSize(1000, 600);
[Code] .....
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Jun 23, 2014
I have this code
<h:form id="theform">
<h:inputHidden id="user_id" value="3" />
<h:commandButton action="userprofile.xhtml?faces-redirect=true" value="Profile" />
</h:form>
How I can retrieve the value of user_id at page userprofile.xhtml?
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May 19, 2014
This program should create a GUI that has 5 classes together on a grid layout. The problem that I am having is that the user input class has the input for kwh, hours, and gallons. I am having problems getting that information from the user input class to the totals class.
user input class:
package applianceutilitycalculator;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Scanner;
import javax.swing.*;
[code].....
The totals class should take the info from the kwh hours and gallons and do the math to get a total and display it in a JTextField(?).
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Jul 10, 2014
How to do this <not in sql> .
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Jan 23, 2014
I'm trying to run the following java program by using the instructions provided here URL....The program tries to connect to LDAP directory, searches for an objectGUID and returns sAMAccountName...But when I compile the java program I get 19 errors as given below.
/a1/utils/seek.java:2: cannot find symbol
symbol : class string
location : class seek
public static void main (string[] args) {
[code]....
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Aug 22, 2014
I have a properties file with a set of commands and their meanings (Command = the meaning). I Populated a jtree with the keys from the properties file, now when I click a node in the jtree (key) I want the value of that selected key to go in the panel that sits in my app next to the jtree.
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Jan 18, 2015
I need to take the users input from 2 boxes and reference that to a sqlite database and populate the fields with the data in the database. I know the database code work.
Here is the code for the "user" form;
Java Code:
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JTextField;
import java.awt.Font;
[Code] .....
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Mar 31, 2015
I am trying to export data from a jtable to a pdf report but every time i try running the code it gives me this exception:
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at GUI.QC_receiving_book.printButtonActionPerformed(QC_receiving_book.java:309)
at GUI.QC_receiving_book.access$600(QC_receiving_book.java:26)
at GUI.QC_receiving_book$7.actionPerformed(QC_receiving_book.java:165)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
[Code] ....
I tried avoiding the null exception by using the if statement but it didn't work. The row I choose from the table is full meaning there are no empty attributes. and all the data are imported from a mysql database to the table as String so there can't be any casting errors.
This is the part of the source code with the problem and i will also post the printing method. I tried debugging the class and when stepping into the first if statement it opened the jTable.java file and pointed at the getSelectedRow() method and this sentence "variable information not available.source compiled without -g option"
private void printButtonActionPerformed(java.awt.event.ActionEvent evt) {
if(samplesTable.getSelectedRow() >= 0){
int row = samplesTable.getSelectedRow();
System.out.println(row);
for(int x=0;x<samplesTable.getColumnCount();x++){
String value = samplesTable.getModel().getValueAt(row, x).toString();
[Code] ....
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Mar 30, 2014
I am creating a simple Symptom Checker application. The problem I have is that I'm trying to retrieve user input (JTextField) by comma's using StringTokenizer which contacts the database for a result which matches the user's input (SELECT * FROM DIAGNOSIS WHERE ?, ?, ?) . It successfully finds the correct result however only in a particular format. Not different combinations....
for example, if I enter say within the JTextField: "tearful, nausea, lack of motivation" it will find the result successfully (as that is how it is formatted within the particular column (in the database table) i wish to display a result from) however, if i enter a different combination of these symptoms: "nausea, lack of motivation, tearful" - it will not find any result. I'm very unsure how to make it work regardless of what is inputted first, second or last.
Here is the code:
public void actionPerformed(ActionEvent e) {
try {
String abc = fieldsymp1.getText();
StringTokenizer str = new StringTokenizer(abc);
while (str.hasMoreTokens()) {
str.nextToken((", ")).trim();
[Code] ....
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Sep 23, 2014
I need to design, implement, and test a program to input and analyze a name. The program begins by retrieving a user input string from the keyboard. This string is intended to be the user's name. These are the errors we have to search analyze the user input for: No blanks between names firstName and lastName, Non-alphabetic characters in names, Less than two characters in first name, and Less than two characters in last name. Each of these errors must be thrown. All exceptions must be derived from a programmer-defined class called NameException. Each exception should use a detailed message to differentiate among the file types of errors.
This is the format of my NameException class, is the format itself correct? I will fill in the details of each exception I am just wondering if that is how I should set it up.
public class NameException extends Exception {
private String firstName, lastName;
public NoBlanksException(String firstName,String lastName) {
}
public NonAlphabeticalCharactersException(String firstName, String lastName) {
[Code] .....
I was told not to try and catch thrown errors in the main method, would I just create another method in the Driver class to take care of that then?
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Oct 16, 2014
The gist of it is to create a very basic memory game. There are 12 buttons, each associated with an icon. Every button that you click will display the icon and will stay there until clicked again. I got the bulk of it taken care of, but my issue lies with switching the icons back and forth. I can get them to display one at a time, but when I click on a new button, all the icons except the button I just clicked don't display. Essentially, only one shows up at a time.
import java.awt.BorderLayout;
import java.awt.EventQueue;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.SwingConstants;
[code]....
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Feb 24, 2015
I am using JS, how we can make focus to a button during onload, the button need to get focus which is in tabbedPane tab Name : (Search Critera1) using javascript.
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Sep 16, 2014
I have a JButton with a .PNG icon on it. I want to get that button click in actionPerformed Method but Jbutton have no Label... How i will know that which button clicked?
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Nov 29, 2014
I am creating a mad libs type program. This section of code is for the user to be able to make their own mad lib template (that people will be able to fill out later). The normal blanks in a mad lib are for verb, noun, adjective, adverb, etc. I cam up with 13 or so of these buttons, but it would be nice that if the user wants to add a button that they think we missed, such as 'Person in the Room' or 'Silly Location'...that the user would be able to do this. I sort of pictured there being a button that says 'add button' or something like that. Is there a ways to do this with the way I've set things up?
public class MadLibs {
public static void main(String[] args) throws IOException {
////////////////////
//TEXT PANE WINDOW//
////////////////////
//Set up a JTextPane object : The JTextPane is a specialized form of the JEditorPane
//designed especially for the editing (and display) of styled text.
final JTextPane pane = new JTextPane();
[Code] ....
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Jun 25, 2014
Let's say I have a text file and in the text file exists file directories as such:
'assets/picture1.png'
'assets/picture2.png'
And so on...
How would I then read from this text file and then create those files using 'new File()'?
Here is my code:
private void getFiles() throws IOException{
files = new File[10];
Scanner scan = new Scanner(new File("files.dat"));
int count = -1;
[Code]....
It does print out those files, but it doesn't create them.
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Apr 22, 2014
i want value of button on button click..and value should be display on next page?? how to do that???
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Feb 14, 2015
I'm doing an aggregation exercise that's suppose to find the volume and surface area of a cylinder. What I'm trying to do is pass values from one class, to a second class, and that second class passes values to a third class.
This may be a clearer explanation: The first class is the main program which sends values to the second and third class. The second class is used do calculations for a circle (a pre-existing class from another assignment). The third class grabs the values that the second class calculated and calculates those values with the one that was passed from the first class to the third class. The first class then prints the outcome.
Problem is when the program gets to the third class, it just calculates the value from the first class with the default constructor from the second class. It's like the second class never received the values from the first class. I think I'm missing a step, but I don't what it is.
First Class:
package circle;
import java.util.Scanner;
public class CylinderInput
{
static Scanner in = new Scanner(System.in);
public static void main(String[] args)
{
//user defined variable
[Code]...
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Sep 22, 2014
I dont know why this does not work. A string called naam is empty in the beginning. Thats why its NULL on the button. But if I give it the value "karel", it still states null on the button, how can I update this?
Java Code: import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Probeer {
private JFrame frame;
private JMenuBar hetMenu;
private JButton knop;
[code]....
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May 29, 2014
Im trying to use num as the text on the button..... (Im trying to make it count when i press the button.)I need to make a listener for the button, and an event that adds 1. (num++)
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.*;
import javax.swing.*;
public class ClickIt {
public static void Practice()
[code]....
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Mar 19, 2014
public void actionPerformed(ActionEvent ae){
float A=0;
int a = Integer.parseInt(tf1.getText());
if(ae.getSource()==b2) {
A=(((30*a*14) / 100)+(30*a));
[Code] .....
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Dec 14, 2014
I have gotten the code up and running, now I am trying to add a previous button. The next button I have now works fine but I can't seem to get the previous button to work.
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.PrintStream;
import java.util.Arrays;
[Code] .....
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