36,051 Topics
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 | Any About this error run: Exception in thread "AWT-EventQueue-0" java.lang.VerifyError: (class: stockinventoryforecast/productEntries, method: <init> signature: (Ljava/sql/Connection;)V) Constructor must call super() or this() at stockinventoryforecast.mainPage.actionPerformed(mainPage.java:226) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018) at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341) at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402) at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259) at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252) at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:289) at java.awt.Component.processMouseEvent(Component.java:6504) at javax.swing.JComponent.processMouseEvent(JComponent.java:3321) at java.awt.Component.processEvent(Component.java:6269) at java.awt.Container.processEvent(Container.java:2229) at java.awt.Component.dispatchEventImpl(Component.java:4860) at java.awt.Container.dispatchEventImpl(Container.java:2287) at java.awt.Component.dispatchEvent(Component.java:4686) … |
| | Hi My reqvirements are as below Input is the address of a folder containing images Output should be a jframe displying first image in a folder when i scroll mouse or press right arrow key then next image should be displayed Similary when i scroll back or press left key … |
| | Hello, I am rather new to this so bare with me! I am currenlty creating a BlackJack game in Java and attempting to use the MVC design when creating it. I have so far created the following classes: - Card: To hold create a card - Deck: To create a …  |
| | package edu.edusys.demo.jdbc.dao; import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.Statement; import java.util.ArrayList; import edu.edusys.demo.jdbc.bean.Customer; public class CustomerDAO { private Connection connection; public CustomerDAO(Connection connection) { super(); this.connection = connection; } public boolean addCustomer(Customer customer) throws Exception { String sql = "INSERT INTO Customer" + "(name,address,phone)" + "VALUES (?,?,?)"; PreparedStatement ps … |
| | Hi all, I have given a assignment to implement patterm matching algorithms and to do a experimental analysis on number of comparisons, real time taken and CPU time taken for each algorithm. I have done all except CPU time calculation. Plz can anyone guide me how to do this... |
| | I'm working on a program that demonstrates polymorphism. It asks the user to create an elementary, high school, or college student. Once a student is created, it is stored in an array list. When prompted, the program is suppose to print out each of the student's information. How do I … |
| | Hi! I have several 55 x 55 px png-pictures, which need to be rotated by 0, 90, 180 or 270°. I tried the following but in that cases the pictures were not on their correct positions anymore. Thanks. // Import the basic graphics classes. import java.awt.*; import javax.swing.*; /** * … |
| | This basic client server program compiles fine in eclipse IDE but I keep getting a zero back from server!!! I'm new to all this client server stuff by the way. package echo3; import java.io.*; import java.net.*; class Client { public static void main(String argv[]) throws Exception { int outgoingdata = … |
 | have various classes representing various types of program-genres (comedy, drama etc). I have a text file filled with '-' seperated values that get read by a class called Processing and puts them into a LinkedList. I have another class GUI_g that creates the GUI. It has 3 JTables. One for … |
| | Hey Guys, I am working on a gui and I've got a two part question. I've got a jlist and a couple of buttons to add and remove components from the list. I've got everything working except for the keyListener. When the cursor is on the jList (hasFocus I assume?) …  |
 | Hi folks.. I'm in search of desktop nofication api's apart from the basic(default) one that java already provides. Can anyone direct me to some good links . Its better if it is free of cost. I found [this](http://blog.swingfx.ch/twinkle-100) nice one but its not free. |
| | I have this block of code below which is to control questions which are to be displayed from the array. I am having problem with the the 3rd line of code, an i am not entirely sure what the problem is. rnd1, rnd2 are both double. Eclipse is telling me …  |
| | Okay, so I have a text file like this: I Did It Your Way, 11.95 The History of Scotland, 14.50 Learn Calculus in One Day, 29.95 Feel the Stress, 18.50 Great Poems, 12.95 Europe on a Shoestring, 10.95 The Life of Mozart, 14.50 And, as you can see, there are … |
| | My program won't run.. I keep getting a nullPointerException but I have no idea why.. Thanks! The program is supposed to create a simulation for a line ---------------------------------------------------------------------------- public class Prog5 { /** * @param args */ public static void main(String[] args) { Simulation simulation = new Simulation(10); simulation.run(); } … |
| | class P3 { public static void main (String[] args) { makeP3Picture(); } public static Picture makeP3Picture(Picture source) { String fileName = FileChooser.pickAFile(); String sourceFile = FileChooser.getMediaPath("butterfly1.jpg"); Picture sourcePicture = new Picture(fileName); Picture targetPicture = new Picture(source.getWidth()*3, source.getHeight()*2); source.explore(); source.copyPhoto(); source.show(); return sourcePicture; } } im getting the error: "makeP3Picture(Picture) in …  |
| | #//Here is my simple class for MyCar# public class MyCar { private int odometer; private int speed; private int gear; public MyCar() //send values to member variables in this default constructor { odometer = 0; speed = 0; gear = 0.0; } public MyCar(int od, int sp, int gr) //constructor … |
| | [Link Anchor Text](http://oi44.tinypic.com/bwfaf.jpg) Hey dudes! I'm pretty crummy with Java layouts, so I was wondering if anyone had time to help me. The rather crude drawing I made is the layout I had in mind. I wanted 3 rows, with 1 gridlayout on the top and bottom, and in the … |
| | Will someone please tell me why I keep getting my custom file not found exception? The file is spelled correctly and is in the same directory of my java file. I am programming on Eclipse on Mac OS X. Here is my source: // Dillon Sheffield // Lab 10a // … |
| | I'm currently writing a program where the program reads in words from a .txt file and stores the data into an array. The user then has the ability to enter in entries into array and the program then writes everything to the txt file where it can be read again. … |
| | Hello, How can I get a bigger textfield? What I mean is: Let's say that I'm going to register a bunch of cars in a program I made. I want to register things like name, model, when it's made etc + description. I can make simple JTextFields for most of … |
 | IF someone can write this code out for me so i can use it as an example for the rest of my problems and question i have to do I would really appreciate it alot. and no this question is not Homework what so ever I am a visual person …  |
| | I have a GUI in which has a container for a JTable called 'listTable'. I want to populate the JTable with data stored in a linked list, using the AbstractTableModel. Basically, I have a LinkedList stored in Processing.java. It contains all the data retrieved from a text file. I created …  |
 | I have a problem with netbeans.... Already I installed MySql. but in netbeans Services panal not mention anything about databases.. If I right click on their its not mention anything.. I want to add database through that. So how I can do it. What are the pre-Requirement to do this(Any …  |
 | My web hosting service provider allows me to uplaod my ROOT.war file only. and there is no directory structure. So is there any way by which I can upload pics and add new pages or make changes in existing pages without re-uploading the entire ROOT.war file. P.S. I also want … |
| | Would anyone happen to know also if there is some predefined swing box for prompting the user to decided whether or not to overwrite an exhisting file? you know the basic "This file already exists, would you like to overwrite it?" |
| | In a nutshell i'm working with a program that uses JSCH and xstream to zip a file, and send it to a remote linux server. I'm using static folders, but when i send a file with the same name as one in the folder it will overwrite the exhisting file. … |
| | Hi forum, I just need a little help on one thing, how can I import this text document and make it usable in a JList object for my GUI application? I Did It Your Way, 11.95 The History of Scotland, 14.50 Learn Calculus in One Day, 29.95 Feel the Stress, … |
| | Hey, so this is my final java assignment for 1st year comp sci program. I really want to get a decent mark before exams, so please I need your help. I've been working on it hard, but this assignment is making me feel dumb :( I'm supposed to make an … |
| | I am using getRow() method of ResultSet class like: int rowCount = result.getRow(); but when i run the application, it gives me the exception that says: *The 'getRow()' method is only allowed on scroll cursors.* Please, anyone, who knows why it happened, explain it with some possible solutions Thanks! |
| | Hi everyboy, I have a question how to add not boolean expression to the conditional loop, Imagine some situation where I have : while(some expression && another expression) { .... } So lets say I want to calculate how many times "another expression" was evaluated. I wish I would stick … |
| | I need to count the number of votes for candidates... I'm getting an unreachable statement error on "int[] array = new int[6];" Scanner sc= new Scanner(System.in); int a= sc.nextInt(); return a; int[] array = new int[6]; int mitt; mitt= array [a]; int rick; rick= array [a]; int newt; newt= array … |
| | this is my sourse code,i have indicated the error in the bottom of the sourse code . import java.io.*; public class Queue { private int maxSize; private int queArray[]; private int front; private int rear; private int nItems; public Queue (int s) { maxSize = s; queArray = new int[maxSize]; … |
| | I want to update my database but the problem is that the driver is not taking any values from the preparedStatement. I am getting an error : java.sql.SQLException: [Microsoft][ODBC Microsoft Access Driver] You must enter a value in the 'ClassicRoom.Occupy' field. Press any key to continue... Here is the ActionPerformed … |
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| | so i have to build an application where i have to read values from a csv file(excel)and insert them in mySQL.i can do the reading part however I'm fairly stumped by how do i insert the values to the database. Any help regarding this matter is apprecaited.  |
| | Basically i'm wondering if i can fill the "File Name" field of a JFileChooser automatically. I'm pulling files from another machine using sftp, and specifying the file to be created with the JFileChooser. So that the file i'm transfering will be saved with the name and location i specify. As … |
| | hello dears, please can anyone correct my java error, when i run bellow java source code error cause as can not find symbol. public class StackApp{ public static void main (String arg[]) { StackX theStack = new StackX(10); theStack.push(20); theStack.push(40); theStack.push(60); theStack.push(80); System.out.println("Value at top : " + theStack.peek()); System.out.println("Is … |
| | Hi, I just started learning about java applets recently and was wondering why the shapes won't appear on screen when I press a button. import java.applet.*; import java.awt.*; import java.awt.event.*; public class Buttons extends Applet implements ActionListener { public void init() { button1 = new Button("Button 1"); add(button1); button1.addActionListener(this); button2 … |
 | I have made a HRMS (Human Resource management System) using NetBeans 6.5 and for database MySQL 5 The project is completed and running fine ( great) without any problem when i run it in NetBeans using Run Main Project Button. Then i 'Clean and Build the project' and get a … |
| | Hey guys. I'm making a project for my university. It consists of Jframes and other JStuff. I'm having problem with data. The problem is changing them. I have 2D array of Strings - numbers and words (but the content doesn't matter). I want to make a JFrame, where you can … |
| | Dear All, Please Help me in this application.... My problem is that i want to select the required text from the following text. In this text I want When user input following text. I will get only special information from it. Abdoul Amin `23 av Olympiades 94120 FONTENAY SOUS BOIS …  |
| | So my assignment is to design a simple GUI calculator using the stack data structure to perform additions, subtractions, multiplications and divisions. The calculator window should have at least two panels - one for display and the other for buttons (0 - 9, . , +, -, X, /, =, … |
| | I have an assignment to write a program in Java to implement the Natural Correspondence Algorithm for converting a linear list into a binary tree. The program should process its inputs in two steps: (a) It first builds a tree for a given input list (b) It then traverses the … |
| | I'm doing a lesson that is supposed to demonstrate inheritance using the song Old MacDonald; there's an animal interface, a farm class that implements each animal object.. you get the idea. I've got two problems. First, The animal has a type and a sound, for example, a chick is [code] … |
| | I'm trying to decompile this one method; I'm pretty sure its purpose is to take two integers and convert them to a single long, but I may be wrong and it can be just some weird math. What I have gotten so far: `long result = (((long)possibleHigh) << 32) + … |
 | Hello I have written a MVC2 : DAO program using an Apache derby embedded DB. Currently I have not been able to jar the program : runs in IDE. My question concerns running this program on multiple work stations of a local network. Will this be possible? Currently when I … |
| | Hey guyz im beginner from java programming. Could anyone please help me fix my problem? I have this method ~~~ public void determineClassAverage() { Scanner input = new Scanner(System.in); int total; // sum of grade int gradeCounter; //number of grade to be entered NEXT int grade; // grade value int … |
| | Hi,I havent posted in over a year but I need a good starting point for a class project. We are using netbeans with glassfish. We have to create online Library. Below is my starting point. Any help is appreciated.I just need a starting point at this time. Im a little … |
| | I need to pass buffer object which has generated values to construcor of reading class to print real time generated numbers. Which is the best way to do it? When I pass generated value I get the number but I need to pass values that are beeinig generated and writed … |
| | Hello, I am attempting to enter two numbers via console in my test class and call a method in my main class to add the numbers and display the answer. Java doesn't like the Calculator.Calcuate(); code. It gives me an error of "cannot make a static reference to the non … |
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