JSF :: CRUD Application No Longer Allows Edit Function
Mar 28, 2014
I'm using Netbeans IDE and Glassfish application server. I have a JSF CRUD application running with a MySQL database and everything was fine until I was asked to be able to sort a column whose MySQL datatype was Varchar.
Here is my Model for Vehicles:
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package entities;
import java.io.Serializable;
import java.sql.Date;
import java.text.DateFormat;
import java.util.Calendar;
import java.util.Locale;
[Code] ....
So I changed the datatype to Integer and updated my source code to change the column from String to Integer. When the list displays every thing seems good and the rows are sorted according to the column whose datatype I changed to Integer.
However when I then tried to edit nothing works and I get HTTP Status 505 from Glassfish with the error message
javax.servlet.ServletException: HV000030: No validator could be found for type: java.lang.Integer
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Jun 23, 2014
I am encountering a problem while running this small piece of code.
public class TestSplit{
public static void main(String[] args){
String myWords[]="My.Home.Is.Being.Painted".split(".");
for(int i=0;i<myWords.length;i++)
System.out.println(myWords[i]+" ");
}
}
The problem is: it does not run at all. No error message is displayed. It just returns to the command prompt when i run it. Where am i wrong?
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Oct 5, 2014
There is an error in my code that pops when I tried to execute my java application for an exponent function that I wrote. Here is my code and here is the error is generated when I run my code:
//a java application that calculates the power of an integer in a method that the user creates
//and uses a while loop to do so. User cannot use any Math class methods to perform this calculation
import java.util.Scanner;
public class exponentiation{
//main method begins execution of java application
public static void main(String[] args){
[code]....
Why is it an illegal start of an expression? I didn't think you needed to used if statements for a whileloop.
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Jun 22, 2014
I would like to create a java gui (with CRUD elements) that connect to MySQL server DB and display a table records (also insert, edit, delete data to table), and I want to know how create such a gui.
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Aug 12, 2014
I am trying to work with a SQL database and some JSF pages that were created with/for CRUD. The data comes up just fine but all my foreign keys show the primary key for the key not the data. So instead of having the actual Zone I get the number (my primary key) that matches the Zone.
example:
4717A Cool ReceptionTitle: Gatherer of Cool Companycom.vancowboy.lotor_db.LotroZones[ id=11 ]
The last item should read "All" not "com.vancowboy.lotor_db.LotroZones[ id=11 ]"
This was straight from a tutorial so I can learn this but the FK has got me baffled...
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Oct 21, 2014
Button Code:
private void DecryptBActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
final String plainText;
if (!areKeysPresent()) {
// Method generates a pair of keys using the RSA algorithm and stores it
// in their respective files
generateKey();
[Code] ....
Everytime throwing exception "javax.crypto.IllegalBlockSizeException: Data must not be longer than 128 bytes" in decrypt method.
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Jun 1, 2014
Which is considered clearer and better for naming?
class SpeedAnimation {
//rate to increment frames at 0 speed
public float baseIncrementRate;
//additional rate to increment frames at, scaled by the speed
public float speedIncrementMultiplier;
//current fractional frame index
public float currentFrameIndex;
//give the upper and lower index bounds to animate between
public int startingIndex;
public int endingIndex;
}
vs.
class SpeedAnimation {
//rate to increment frames at 0 speed
public float base;
//additional rate to increment frames at, scaled by the speed
public float multiplier;
//current fractional frame index
public float index;
//give the upper and lower index bounds to animate between
public int start;
public int end;
}
I've always been really elaborate with my names, because I thought that being more descriptive is more precise and lowers the chance that names might clash with each other, but then I noticed that a lot of my code becomes really lengthy and tiring to read, ie.:
float speed = body.getVelocity().len();
float positionIncrement = (baseIncrementRate + speedIncrementMultiplier * speed) * deltaTime;
currentFrameIndex += positionIncrement;
currentFrameIndex = currentFrameIndex % (startingIndex+endingIndex-1) + startingIndex;
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Feb 24, 2014
I am designing a program in-order convert Binary to Decimal values with added features:
Rejecting binary values longer than 32 bits
Prompting the user to make multiple entries after completing the binary to decimal conversion of their first entry. I was trying to code this in Nested For Loops, but I don't know if I've really done that.
Here is what i have so far.
public class BinaryToDecimal {
public static void main(String[] args){
Scanner scan = new Scanner(System.in);
String binary;
int decimal=0b10, i, rem;
boolean isBinary = true;
[Code] ....
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Jun 23, 2014
I would use the return value of a function how parameter of other function..In java is:
// the call produce "YES"
SecondClassController.funcSecondClass(FirstClassController.funcFirstClass());
In my web page I need to do something like this:
[...]
<h:outputText value="#{secondClassController.funcSecondClass(#{firstClassController.funcFirstClass()})}" />
[...]
obtain:
javax.servlet.ServletException JBWEB006007: Failed to parse the expression
@Named
@SessionScoped
public class FirstClassController implements Serializable{
[...]
[code]....
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Jan 23, 2014
I am implementing code of edit/update row of datatable in jsf.
package org.demo;
import java.util.ArrayList;
import java.util.Arrays;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
@ManagedBean(name="order")
@SessionScoped
[Code] .....
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Mar 1, 2014
One of the random number generators in Java extract the higher-order bits of the random number in order to get a longer period.
I'm not sure if I understand how this is done. Suppose that the random number r = 0000 1100 1000 1101. If we extract the 16 most significant bits from r; is the new number r = 0000 1100 or r = 0000 1100 0000 0000?
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Feb 10, 2014
I want to display the data on edit link according to Id no .For Ex I have data on the table below
IDName Emp ID Dept Edit
1xyz 3425 abcd Edit
On Edit link display the data according to ID number. How can i write the code.
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Nov 19, 2014
I want to write a little java program that when ran it will add information to my host file. A screen will pop up with a button on it. When you click the button it will add a few ip to domain connections. In order to edit the host file with notepad you must first give notepad admin privileges. I can't find a way to do this and I'm extremely fresh to programming. Is there a way I can write directly to the file or is there a way to run notepad with elevated privileges?
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Sep 7, 2014
I have been developing what I intent to be a base class for several forms that will allow the user for adding / editing / deleteing records. These records could be customers, products, suppliers etc.
I have designed a basic form that has an add, edit and delete button. For the add button, I would want to clear all the values in all of the controls (textboxes, combox etc) in preperation for adding a new record.
My question is this. Is this something I should do in the base class OR should it be handled in the classes that will extend from the base class? Perhaps if the controls were datalinked to the data they will clear themselves (I haven't got that far yet so I dont know). I thought maybe I could write code in the base class that could loop through all of the controls and call this from the extended classes.
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Apr 2, 2015
I currently have all the code working to fill my database and to display it, although I would like to have it displaying in a JPanel but I cannot figure it out so a JFrame will do. Add, Edit and Delete button for the JTable so I can add rows to the table and database, edit existing rows and delete rows also.
Here is the code for my current class.
package ManGUI;
import Database.DatabaseOperations;
import javax.swing.*;
import javax.swing.border.BevelBorder;
import javax.swing.table.DefaultTableModel;
import javax.xml.crypto.Data;
[Code] .....
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May 8, 2014
How to do this editing the last 3 letters of a string that i retrieve from database.. I have a string "111-222-333-000" here's the sample what i want to happen was to edit the last 3 letters of the string ,,
i insert into database "111-222-333-000" then i retrieve it for editing but what i want to happen is when i retrieve it what i can only edit was the last 3 strings only
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May 13, 2014
I just went over how to open and edit text files in java. Was wondering how to open mp3, mp4 and other media files, is there a special package i need to import or plugin that I need to install in eclipse?
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Nov 22, 2014
I am currently developing an android application. there is a problem i got just now. here's the code for java.
public class doReceipt extends Activity
{
boolean nsPutih, nsBeriyani,nsMinyak,aymKurma,aymLemak,aymKari,aymRendang,aymMerah,
prtAsam, dggTomato, dggSinggang, dggMerah,kerabuTaugeh, pindangKacang,jelatah,dalcaSayur,papadom,
kariIkan,ikanMasin, sirapAis, oren,tehTarik,agarAgar, buburKacang,kuih, price;
TextView tvOutput1,tvOutput2, tvOutput3, tvOutput4, tvOutput5, tvOutput6, tvOutput7, tvOutput8, tvOutput9, tvOutput10,
[Code] ....
There is no error shown in the code. but, when i run my program for start, the page before cannot proceed and yet, i cannot proceed to this page and the application stop unexpectedly. below is the error that i gain in logcat.
11-22 06:59:57.664: D/dalvikvm(290): GC_EXPLICIT freed 1505 objects / 106560 bytes in 184ms
11-22 07:00:39.174: D/dalvikvm(320): GC_FOR_MALLOC freed 2489 objects / 160496 bytes in 109ms
11-22 07:00:39.534: E/MENU PAKEJ A(320): Total Price: RM 0.0
11-22 07:00:39.544: D/AndroidRuntime(320): Shutting down VM
[Code] .....
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Feb 5, 2015
As shown in the SS I show the data of the batch from the db.Now I want to edit the data of the jtable using the default Double editors and also show the data using a Date renderer in dd/MM/yyyy format.The problem is when the data is loaded from the db,I am not knowing how to implement and set the editors to double and date.I am new in java.The code of the above is shown as follows.
Java Code:
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package Billing;
import java.awt.Component;
import java.sql.Connection;
import java.sql.Date;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
[Code]...
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Mar 22, 2014
i want to know how to data show in text box according click edit button.this is 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">
<%@page import="java.sql.*,java.util.*"%>
<%!ResultSet rs = null;%>
[code]....
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Aug 7, 2014
So when writing my first "Hello World" app everything seemed to work just fine. I wrote the code, compiled it, and then ran the class file and it worked, I got the return Hello World! But when I tried to write another app which is basically the exact same thing just a different sentence, I keep getting a bunch of error codes saying illegal character. I did everything the exact same. I am using Text Edit on a Mac and using Terminal to execute the Java code.
Here is what I wrote....
public class MyFirstApp
{
public static void main( String[] args )
{
System.out.println(“i rule the world!”);
[code]...
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May 24, 2014
I extracted a jar file and decompiled one of the classes using jad in order to made a small edit (the original jar was looking to load an image file in the current directory, I replaced the current directory with an environmental variable). I went and recompiled that class. It complained that it cannot find some swt classes, so I downloaded swt.jar for Linux from the Eclipse website and specified the classpath to contain it. It compiled fine and I repacked the jar file. But when I tried to execute it I got:
Java Code: Exception in thread "main" java.lang.NoClassDefFoundError: org/eclipse/swt/widgets/Decorations
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2531)
at java.lang.Class.getMethod0(Class.java:2774)
at java.lang.Class.getMethod(Class.java:1663)
[code]...
I do not get the same error when I execute the original jar file (that complains that it cannot find the image file unless I put the image in the directory I execute it from). I even tried putting swt.jar in the classpath during execution:
Java Code: java -cp "/path/to/swt.jar:." -jar jar-file.jar mh_sh_highlight_all('java');
But got the same error. I'm using IcedteaJDK (OpenJDK) 7 and Linux
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Jul 11, 2014
I can insert data in database, delete aslo using JSP. But facing problem while updating the information saved in database as m using MySQL 2008. I want to see the bring saved in database with particular username into the updateinfo.jsp form.
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Mar 22, 2014
The program below compiles and functions correctly for the most part. It is supposed to be a simple GUI Text Editor with Edit and Format functions. The content pane is supposed to be a scroll pane, however no matter how much I type into the editor, the scroll bar does not appear. Also, the none of the functions under the "Edit" menu work.
Java Code:
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;
import java.util.StringTokenizer;
import java.util.regex.Pattern;
/**
* A simple text editor. It creates and displays the GUI Text Editor.
*/
public class TextEditor extends JFrame implements ActionListener
[Code] .....
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Nov 17, 2014
convert or move standalone java thread application into Tomcat server container for accessing its JNDI services? Also is it possible to schedule this thread application in Tomcat server? is it possible to keep this app in tomcat as web application and schedule in window's scheduler.
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Mar 11, 2014
I am new to work on JNLP program. I have created a SWING program, JNLP file when i deploy the ear file i am getting 404 error. Please find the steps in details.
1.Created a dynamic web project JWStartProject in eclipse
2.Create a HelloWorld.java class under default package.
import javax.swing.*;
public class HelloWorld extends JFrame {
private static final long serialVersionUID = 4968624166243565348L;
private JLabel label = new JLabel("Hello Java Web START!");
public HelloWorld() {
super("Jave Web Start Example");
this.setSize(350, 200);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE );
this.setLayout(null);
[Code] ....
Now I exported this project as JWStartProject.war contains following code.
Created Server in Websphere Admin console
Deployed this war file under the server and started.
I have added MIME types also.
I am unable to launch the application. I am getting 404 errors. May I know where I went wrong?
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