Adding Record To A Database With Java
Jul 18, 2014
I have a sqlite database i already have the connection with java and it works ... I have a method to add a record ...
public boolean AddRecord(CustomerRecord r){
String sql = "INSERT INTO CustomerRecord (Name, Number, Adress)"
+" VALUES(?,?,?)";
try {Connection connection = getConnection(); // call connection method
connection.setAutoCommit(false);
[Code] .....
I call this method in my interface and i write
if (addrecord == true){System.out.printnl("record added");}
I close the interface then enter search for the record i just added using add record method but i do not find it
what i am trying to say the added record using my application is not there. The question is how to save this record in the database ...
I thought
ps.executeUpdate();
should do this but it is not saved.
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Feb 19, 2014
I have written a program student record system but can not save data to view or submit record. Able to run the program but failed to submit record or view pre-submitted records.
Student.java
import java.io.*;
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
class Student extends Frame implements ActionListener {
String greeding="";
Button btnNewStudent;
[Code] .....
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Nov 4, 2014
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
String delete = ("DELETE FROM anagrafica WHERE Nome = ? And Cognome = ?");
ConnectionManager cm = new ConnectionManager();
String Nome = request.getParameter("nome");
String Cognome = request.getParameter("cognome");
[code]....
and this is my JSP.The problem is easy, when I click on the grid for deleting the record two things happen, or the record is deleted only on JSP but not in my Database or Nothing happens even on my JSP, it is because I don't know how to get values from my jsp and send them to replace the ? in my delete query I tried even to give a name to the <tr> which contains Name and Last name but obviously i guess it works only for input type ex. Textbox.
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Feb 9, 2015
<%@page import="java.util.ArrayList"%>
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@page import = "java.util.Iterator" %>
<%@page import ="java.util.List" %>
<%@ page import="com.asal.training.rasha.servlet.*" %>
[Code] ....
it displays table every time i will run the server ? gives the data twice and so on
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Mar 18, 2013
How I can add a column with check boxes for each record in my table in JSP? Also, I want to figure out a way that what records the user has checked!
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Apr 19, 2014
I 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.
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Jul 19, 2014
I am trying to insert a record to a table in my database . I used the same syntax for 2 tables, one does work and the other does not work . I could not find any explanation for this error
"INSERT INTO CustomerRecord (Name, Number, Adress)"
+" VALUES(?,?,?)"; //first table working well
ps.setString(1,r.getCustomerName());
ps.setString(2,r.getCustomerNumber());
[Code] ....
For some reason one does work but the other does not work it says syntax error near order (table name). I am using sqlite db ...
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Sep 7, 2014
I am very confused about why my code is not working.. The function of my code will add records in my database (MySQL), Swing components of my frame..
btnUserAdd = jButton
txtUname, txtPword, txtLname, txtFname, txtMname, txtEmpNo = jTextField
cbAccType = jComboBox
EmpNo, Uname, Pword, Lname, Fname, Mname, AccType = MySQL fields
I created a method to be called when btnUserAdd is clicked. here is the code for the method:
public void UserAdd(){
String sql = "SELECT * FROM User WHERE Uname = ? and EmpNo = ?";
try {
pst = conn.prepareStatement(sql);
[Code] ....
the error is that it does not add the record it will display JAVA.LANG.NULLPOINTEREXCEPTION...
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Sep 12, 2014
I have tried running the java application without adding the site to site list in java security tab. But I get a sand box message as APPLICATION BLOCKED BY SECURITY SETTINGS. How to run the java application without adding the site to site list in java security tab.
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Apr 25, 2014
So I have two related tables - Country (Master) Projects (Detail). Country has a OneToMany relationship with Projects. I put a link on my AllProjects.xhtml page. When tyhe link is clicked it uses a data model class to to display the current (clicked) project record (projectRecord object). After editing all the details, the UPDATE button calls a merge method in the DAO class. On the first attempt to update, nothing happens and the record is returned as it is with no errors. If I try updating again, I get:
Error Code: 1062
Call: INSERT INTO projects_beta2b_projects_beta2b (projects_PROJECTID) VALUES (?)
bind => [1 parameter bound]
Query: DataModifyQuery(name="projects" sql="INSERT INTO projects_beta2b_projects_beta2b (projects_PROJECTID) VALUES (?)")
[Code] .....
My classes are:
projects.java
@Entity
@Table(name = "projects_beta2b")
public class Projects implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private int projectid;
private String projectName;
private String client;
[Code] ...
Is the 'new' keyword in the entity class causing the Inser statement in the DAO because the JPA thinks I want to create a new object therefore invokes INSERT instead of UPDATE?
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Apr 22, 2014
I am working on web project in java. i have taken buttons in column..and projects is my column..when i click on a button in first row ,i want fetch all information about selected project....so how can i do that?
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Feb 7, 2014
I am running this method but for some reason I am not able to find the data record, it keeps going to the catch. I have the data.txt file in the same directory as the java file.
public static Games[] gamesRecord(){
Games[] game = new Games[50];
try{
Scanner dataFile = new Scanner(new File("data.txt"));
for(int i = 0; i > 50; i++){
game[i].title = dataFile.next();
game[i].releaseDate = dataFile.nextInt();
game[i].redistributions = dataFile.nextInt();
game[i].platformRelease = dataFile.next();
[code]....
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Nov 6, 2014
In my java web jsf seam jboss application, I want to add a row in a table with some data fields such as date type, String etc, but one field will be a word attachment, how to do it?
Basically, there is a loop to create some rows of data in a table, before each table row data creation, I will create a word file and saved to a local path(the physical file path is hardcoded), then I will create a table row and attach this word file to that row. the loop will continue until the end of loop.
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Nov 7, 2014
I'm making a game to teach myself programming java so I can start making android. I have this game I'm making where there will be objects(so far its asteroids) will be falling with a progressive velocity (they will move faster as time goes on). The object is the click on the objects before they hit the bottom. It's still early meaning not all the parts I want to implement are there but it works the way I want it to so far besides my click function.
I'm using the Mouse.isButtonDown(0) to record left click but It lets me hold it down and hover over them instead of clicking on each one. Here is a snippet of the part of the code im talking about :
I uploaded a .jar and a exe file so you can see what I mean
[URL] .... -jar
[URL] .... -exe
public void update(GameContainer gc, int d) throws SlickException
{
posX = Mouse.getX();
posY = (Mouse.getY()-height)*-1;
timePassed += d;
deltaTime= deltaTime();
[Code] .....
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Mar 2, 2014
I want an app that I can use to save the name, address, item sold, subject discussed and date that I visited someone - in a job similar to a sales rep. I would like to be able to choose how to sort the info so that if I sort by date I can see who hasn't been visited for the longest and start there. If I think of someone's name then of course I want to sort by name.
One of my friends says he works with "php"[? I'm still learning these terms] and everything happens online. I would like it to be an android app so it can be done without an internet connection ....
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Oct 11, 2014
I can't finish my project in my OOP subject,Ordering System Program,but i am finished with the layout and some processes.
I have complication in which i don't know how to code a process that will record all the ordered items.
i have items like [MS1]Taro Milk Tea.. and there's this textbox that will will get the inputted text and get the quantity of it by JOptionPane.
There's this another JOptionPane that will show the order(s) when "Show Order" button is clicked.
My main problem is i can't record additional items if i want to add more . and my variables are all stored in an array.
Any different way of getting the order,quantity,price of it and Sum all of it and Display the Ordered items...
My professor required that we used inheritance so i have 2 subclasses..
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class MilkteaGUI extends JFrame implements ActionListener,WindowListener {
MtGUIProcess mg = new MtGUIProcess();
Label cardNo = new Label("Card Number:");
[Code] ....
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Aug 13, 2014
import java.io.*;
public class workhours{
public static void main (String args[]){
try{
BufferedReader breader=new BufferedReader(new InputStreamReader(System.in));
String days[]={"Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"};
[Code] .....
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Sep 21, 2014
I have a program that records and reruns network traffic. It was developed in C and runs in my case under Windows 7 Professional but will run almost anywhere. I have observed a lack of stability.
First I have a JAVA stand alone GUI program that runs the program as follows:
g11_bttn_start_script_capture.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
URI uri = null;
URL url = null;
String tempstr = "";
tempstr = "-s " + g11_txt_PATH_portnumber.getText() + " " + g11_txt_scriptname.getText() + ".both";
[Code] ....
Basically it launches the executable t3drive, hangs arounf so it gets a chance to start, and then connect to it via the embedded browser.
It frequently works, sometimes launches in the browser but then freezes, and sometimes fails to start at all.
t3drive works 100% of the time if I run it under cygwin and I can reliably connect to it using any browser.
Why this might not be stable? Just looking for a direction of what to try next.
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Jul 12, 2014
So I was making a Java Calculator that only adds. The problem is that the numbers are not adding. I think it is because whatever has been clicked is not being saved to be added.
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
[Code] .....
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Jan 13, 2015
It works when i do this ,
String a = "*";
for(int i = 0; i++; i<10){
System.out.println(a);
a = a +"*";
}
but it doesn't work the other way,
String a = "***************";
for(int i = 0; i++; i<10){
System.out.println(a);
a = a - "*";
}
I searched about this online and read strings are unmutable in java but what does that exactly mean ? If the string cannot be changed how i am able to add the characters but not remove them.
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Oct 26, 2014
Is there any way to add duplicate keywords (for all java keywords) maybe in a different language such that we can program java in a different language.
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Mar 26, 2014
I am making a quiz in Java. I need to be able to add images and colours into my quiz, to make the GUI look more appealing. At the moment, the JOptionPane that I am using looks very plain and boring. I want to be able to have my quiz running the same as it is at the moment, but I want to be able to import the images, add colours, and add Here is a copy of my quiz code:
Java Code:
package quiz;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.util.Scanner;
import javax.swing.AbstractButton;
import javax.swing.ImageIcon;
import javax.swing.JOptionPane;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
[code]....
how I have added the images into the src folder:
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Mar 14, 2014
I know there was a change in the later versions of Java where the C++ equivalent of a <template type> was added. Unfortunately the change has 'broken' my older code. If I have a JList and I want to add elements to it then now I should specify the type e.g., the list will store Strings. When I do this and then add data to the list (or actually the list model) the code is ''fixed". However if after adding those new elements to the list I later need to add more elements, which isn't unreasonable for a list...to have elements added dynamically at run time then I again get the same compiler error message that I haven't correctly specified the type:
// Error message during compilation
Note: Driver.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
// My code
// Problem here: I try to add new elements to the list. It's the very last line of the method that results in the error. I tried various things such as:
// model.addElement(<String> s);
// but so far nothing has worked. How do I add new elements to the list (model)?
public static void m2(JList <String> list)
{
String s;
int i;
String [] array = new String[10];
[Code] ....
// Code is OK: Create the array of strings to add to constructor of the JList
public static String[] m1(){ String s;
int i;
String [] array = new String[10];
for (i = 0; i < 5; i++)
array[i] = i + "*"; return(array);
[Code] ....
// The change I had to make when compiling under the newer version of Java to indicate that the list would store strings
// Things are okay here now but then when I try to add new elements to the model via method 'm2' that's where I get the compiler error
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May 19, 2014
I just want to add a text field and a label next to it that says "Hourly Wage".
Also, when I run this in Xcode, it reports back with "Shell Script Invocation Error" "Command usr/bin/java failed with exit code 1".
Here's my program:
package summerIncome;
import java.util.Scanner;
public class SummerIncomeCalculator {
public static void main(String[] args) {
jFrame frame = new Jframe("Summer Income Calculator");
frame.setSize(400,300);
[Code] .....
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Jan 19, 2015
I've added a small program that reads from a .txt file to the windows 8 startup folder using a .bat file ... The problem I have Is I've used relative paths for text files In the program and It doesn't work unless I change them to absolute paths.
The .bat file Is basically java -cp[absolute path to program directory] ReadAFileApp . Is there something (most likely yes!) I'm missing here ?
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Jul 11, 2014
I am trying to design a generic RPG game. The issue I am having right now is in my Class I have a subroutine (think that is the correct term) that is basically set up to hold a series of Print Statements. I am really just trying to get some Values that are stored within the Applet, have them assigned to their correct variables and then returned in the print statement. Yet, when I run the applet it just pops up the Applet blank and gives me a long list of errors and I really don't understand when they mean.
Here is the code:
The Class
public class CharacterSheet {
final String NL = System.getProperty("line.separator");
public String characterName;
int playerStr;
int playerCha;
[Code] ....
And the error messages:
Exception in thread "AWT-EventQueue-1" java.lang.NullPointerException: String is null
at sun.java2d.SunGraphics2D.drawString(Unknown Source)
at TFApplet.paint(TFApplet.java:15)
at javax.swing.RepaintManager$3.run(Unknown Source)
at javax.swing.RepaintManager$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
[Code] .....
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