Primary Key Validation In Java
May 29, 2014How do you do validation in java for primary key lets say the table got combination of two columns as primary key,how can i validate that if use enter already existing value...
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Java Literal And Assignment To Different Primary Types
Jan 20, 2015I thought numeric literal were by default int or doubles, depending on if have a . and numbers after the But I wrote a quick test program as listed below. I understand the float float floatA = 5.5; failed to compile since 5.5 is a literal of type double and you are trying to assign this to a floag
What I am having problems with is byte byteA = 5; 5 is a literal of type int and this is being assigned to a byte and compiler should complain.The compiler does not allow two byte values to be added and assigned to a byte since the result of the addition is an int
class literalTesting{
public static void main(String[] arg){
byte byteA = 5; // allowed WHY I thought literal is an int and assigning int to byte
byte byteB = 10; // allowed
[code]...
How To Use Validation On Label Or Textfield In Java
Apr 28, 2014How to use validation on a label or textfield in java.
I have a textfield and i want that only username with @ sign will be taken by the program or gives an error.or a textfield that can only take numeric values or whatever the developer wants to take from user..
Email Input Validation In Java
Apr 5, 2014I want to validate an email input. The email input can only have one @ and at least one '.' after the @. I would like to ask if my regex pattern is correct.
YOUR CODE HERE
import java.util.InputMismatchException;
import java.util.Scanner;
public class email
{
public static void main(String []args) {
[Code] ....
JPA Primary Key From Two Foreign Keys
Oct 22, 2010I am new with java, eclipse, jpa(eclipselink), postgresql, and trying to make a web application. I have two tables:
bids: id, quantity, price
trades: bidid, askid, quantity, price
bidid and askid columns are foreign keys from bids table (id), and they are the primary key for the trades table.
I created the Entities from the Tables (Bid and Trade class) with eclipse and it generated a TradePK class for the primary key.
Trade.java:
@Entity
@Table(name="trades")
public class Trade implements Serializable {
@EmbeddedId
private TradePK id;
[Code] ....
I understand that this is necessary because the primary key is from two column, but as soon I want to persist a Trade back to the database Eclipselink call the column names twice:
INSERT INTO trades (price, quantity, datetime, BIDID, ASKID, bidid, askid) VALUES (?, ?, ?, ?, ?, ?, ?)
So postgres give me back an exception: ERROR: column "bidid" specified more than once
And I don't know why. According to the JPA docs I didn't found any mistake:
Introduction to EclipseLink JPA (ELUG) - Eclipsepedia
Or I just can't see it... or is there a better doc which explains it better?
Trap Primary Key Violation Exception?
May 30, 2014i have a table with two columns as primary key i what to trap exception if the use in UI try to enter duplication in the table i don't what to throw ORA ERROR i what to display meaningful error massage,my database is oracle 11g
this is how i what to do it
i what to add integrity constraint to the table, and i use explicitly name it.
- i test the database to figure out what exception it returns for that constraint. With luck the name i used will be in the text of the exception.
- i add a catch to my database layer that catches SQLException, looks for the error message, and then throws a different exception, probably my own message
- In my UI layer catch that specific exception and convert it to something appropriate.
Deep Clone Of Entities - Set Primary Keys To Null
Nov 21, 2014I need to get a clone of a fairly deep object tree. All objects are entities and I need to set the primary keys to null. The root object:
public class Grundentscheidung implements Cloneable {
@OneToMany(cascade = CascadeType.ALL)
@JoinColumns({
@JoinColumn(name = "gesamtentscheidung_dstNr"),
@JoinColumn(name = "gesamtentscheidung_id")
[Code] .....
When I call
Grundentscheidung grundentscheidungClone = grundentscheidung.clone();
grundentscheidungClone contains the whole object tree with all dependencies, but the Tatbestand objects have their primary keys. When I use the debugger I see that Tatbestand.clone() is never called.
Is my code faulty? I would like to avoid to write a large method which sets all primary keys on the object tree to null.
Do-while Input Validation
Oct 24, 2014I need to write an input validation while using the do-while statement. I feel like most of it is good except that it gets stuck inside the brackets of the do statement. After I enter an input, it just keeps asking me over and over for an input. Then I have to make it s if you enter an input that is out of range, you have to keep entering an input until it is in range.
Java Code:
do
{
System.out.print("Please enter the amount of spaces the letters will shift... ");
shift = uInput.nextInt();
} mh_sh_highlight_all('java'); Java Code: public class ShiftEncoderDecoderDriver
{
public static void main(String[] args)
[code]....
Adding Validation To A Constructor?
Nov 17, 2014I want to add validation to some of the elements in my constructor.
Person(String idIn, String nameIn, ) {
this.id = idIn;
this.name = nameIn;
}
I want to be able to check that the data for the ID is limited to a certain collection of characters formatted in a certain. For example, I may wish to limit it to 5 lowercase letters or numbers, or a combination of both. How could I do this?
Why Username Validation Not Working
Oct 24, 2014I have a JSF page for changing login credentials and i preferred to use Java validations instead of JSF validations on the inputText. The password validation works fine but the username validation does not produce any output. This is my JSF form
HTML Code:
<h:form>
<p><strong>Please type your new username: </strong>
<h:inputText size="15" value="#{register.newUsername}"/></p>
<p><strong>Please type new your password: </strong>
<h:inputSecret size="15" value="#{register.newPassword}" /></p>
<p><strong>Please retype new your password: </strong>
[code]....
Time Input Validation
Nov 24, 2014I am trying to validate user input of time. It seems that only part of it works. It will only accept hour 20-23 as valid.
void timeValidate() {
String value = "";
boolean bTryAgain = true;
Scanner sc = new Scanner(System.in);
[Code] .....
Date Validation Not Working
Mar 2, 2015<%@ page import="org.springframework.web.context.WebApplica tionContext" %>
<%@ page import="org.springframework.web.context.support.We bApplicationContextUtils" %>
<%@ page import="java.util.*" %>
<%@ page import="java.util.ArrayList" %>
<%@ page import="java.io.*" %>
<%@ page import="java.text.SimpleDateFormat" %>
<%@ page import="java.net.*" %>
[Code] ....
Error Handling / Validation In GUI
Feb 10, 2014I have a GUI that prompts the user for information. When they click 'submit', a new customer gets created from a class like so ...
Java Code:
public void actionPerformed(ActionEvent arg0) {
Customer customer = new Customer(); // New customer object
customer.name = view.getName();
customer.age = Integer.parseInt(view.getAge());
customer.ccn = view.getCCNumber(); mh_sh_highlight_all('java');
I am having difficulties validating my variables for nulls. For instance ...
Java Code:
// METHOD TO RETRIEVE TEXTBOX INPUT -- NAME
public String getName() {
String name = null;
if (jtfFirstName.getText() == null || jtfLastName.getText() == null || !jtfFirstName.getText().matches("[a-zA-Z]+") || jtfLastName.getText().matches("[a-zA-Z]+")){ // Validate name fields
JOptionPane.showMessageDialog(null, "<html><i>Improper Input Detected.</i>
[code]...
I can't seem to win with this. Whether the fields are filled in properly or not, I get the error message and the program continues to completion using the name "null".
Data Validation Of XML File
Mar 23, 2015I have an xml file whose data needs to be validated with 250+ rules, the size of the xml can range from 4MB to 50 MB. Have the following questions.
1. Where the Rules should be defined, as i would like them to dynamically controlled(instead of hard coding)
2. Given the size of the data and input being xml, how should i approach this problem(considering the rules might change etc)
3.The names of the UI and XML tag names will be different, so when should the translation takes place
Following is the structure of the xml :
<DATA>
<Parent>
<Fields>
//All the data like name, age, height, weight, blood group etc goes here
</Fields>
<Childs>
<Name = 'Andrew' id = 7560>
[Code] ....
Swing/AWT/SWT :: GUI Phone Number Validation
May 2, 2015I am trying to validate the phone number with a method called isValidAddress and whenever it gets to that line of code in the while loop I get a lot of red line java exceptions. I am referring to lines 130-138
package pa4;
import ch9.Contact;
import ch9.SortPhoneList;
import pa4.pa4Delegate;
import javax.swing.JFrame;
import javax.swing.JLabel;
import java.awt.*;
import java.awt.event.ActionEvent;
[Code] ....
JSF :: Page Validation Using Jquery Not Working?
Apr 8, 2014I want to validate my JSF page using JQuery. I tried a piece of code. But it did not work. The foll is my code.
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:f="http://java.sun.com/jsf/core"
[code]....
Swing/AWT/SWT :: Mobile Number Validation?
Apr 6, 2014if (TxtMobile.getText().length() < 11) {
rooms.setVisible(false);
JOptionPane.showMessageDialog(getRootPane(), "Mobile number should be 11 numbers long", "Mobile Error", JOptionPane.ERROR_MESSAGE);
TxtMobile.requestFocus();
}
else if (TxtMobile.getText().length() == 11) {
rooms.setVisible(true);
}
No compilation errors but code doesnt seem to be working. IF mobile number input is less than 11 numbers an error message dialog appears to alert the user then is supposed to focus on the text box in question. But instead after clicking the ok on the dialog box, the next rooms form shows up even though ive set that to setVisible(false).
Upload And Downloading Files With Validation
Mar 24, 2014code for upload and downloading files with validation (eg. File size not exceeding 100MB) in java
View Replies View RelatedInput Validation For Negative Numbers
Feb 20, 2014I am very new to Java. I have been working for a couple months on a program for school. It has not gone well. I finally was able to scrap together a working program, but i left something out that needs to be. I have to include input validation to check for negative values, prompting users to re-enter values if negative. I have included my current code, the program works perfectly, but what to do about the negative numbers.
Java Code:
package gradplanner;
import java.util.Scanner;
public class GradPlanner {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
int numofclasses = 0;
int totalCUs = 0;
[Code] ....
Password Validation - Special Characters
Oct 30, 2014import java.util.Scanner;
public class PassCode
{
public static final String SPECIAL_CHARACTERS = "$,#";
public static void main(String[] args)
[Code] ....
I'm having trouble with the code using char[]c, for the special characters. Every thing else seems to work correctly, expect for the special characters.
Input Validation For Negative Numbers
Feb 20, 2014I am very new to Java. I have been working on a program. It has not gone well. I finally was able to scrap together a working program, but i left something out that needs to be. I have to include input validation to check for negative values, prompting users to re-enter values if negative.I have included my current code, the program works perfectly, but what to do about the negative numbers.
package gradplanner;
import java.util.Scanner;
public class GradPlanner {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
int numofclasses = 0;
[Code] ....
JSF :: Submit Form Says Validation Error
Feb 18, 2015In my web application (jsf 2.2 + prime 5), when I click the submit button, JSF says: "validation error". I think the problem is related to my equals method contract.
Debugging the equals method, the type received by this method is "Short" (my PK type) and not the object type to compare (professional type in this case). So, equals will return false always!
PK declaration in Entity Class
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Basic(optional = false)
@Column(name = "id")
private Short id;
equals method:
public boolean equals(Object obj) {
if (obj == null) {
return false;
[Code] ....
Is this correct?
EJB / EE :: Bean Validation Error In JPA When Trying To Persist Entity
Aug 5, 2012i get this error when trying to Persist a customer Entity in my web application using netbeans with the default glassfish server persistence provider eclipselink(JPA2.0)
error is
SEVERE: javax.validation.ConstraintViolationException: Bean Validation constraint(s) violated while executing Automatic Bean Validation on callback event:'prePersist'. Please refer to embedded ConstraintViolations for details.
the table that i want to write to has the following colums
id ==> primarykey auto increment not null int
name == varchar(45) not null
phone ==> varchar(19)
nationalIdNo ==>varchar(19)
balance ==> bigdecimal(6,2) not null default(0.00)
in my addNewCustomer i only need to set name, phone and nationalIdNo only this is my code
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package session;
import cart.Cart;
import entity.Customer;
import javax.ejb.Stateless;
import javax.ejb.LocalBean;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
[code].....
why am i getting this error? and how do you do a bean validation?
JSF :: 2.0 - How To Highlight InputText When Validation Error Occurs
Mar 18, 2014How to highlight an inputText in JSF 2.0 when a server-side validation error occurs? I have the server side validation,if validation fails, text box color (style) should change. Else it should display in normal color.
View Replies View RelatedMake Edit Text Validation For Android
Nov 22, 2014I 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] .....
Servlets :: How To Provide Server Side Validation With JSP
Apr 8, 2014I want to know what is the best way for server side validation in servlets with JSP.
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