3,978 Topics
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 | This is the output: https://fbcdn-sphotos-a-a.akamaihd.net/hphotos-ak-prn1/541619_462450913826230_932486202_n.jpg This happens when I input "1" in the quantity textfield. (The quantity textfield turns null after inputing a value) But when I put "1" in the quantity textfield and click Oranges, it overwrites the Apples. https://fbcdn-sphotos-g-a.akamaihd.net/hphotos-ak-ash4/299813_462450910492897_2137805386_n.jpg WHat i wanted to happen is that it'll tally …  |
| | I have to access a java swing application which is on server machine from a java web application Please help me. I have to send few attributes tu Gui apps and in turn retrieve result from that.. |
| | Hello, I'm new to Java and GUI programming. I've just created my first simple GUI app which finds the appropriate FedEx zone based off of the zip coded entered in a text field. My question is how do I make it so the user can hit enter after entering in …  |
| | Here is my code for my program. import javax.swing.*; import java.awt.event.*; import java.text.DecimalFormat; public class SalesTax extends JFrame { private JPanel panel; // A panel to hold everything private JTextField totalSales; // To get total sales private JButton calcButton; // Calculates everything // Constants for tax rates private final double … |
 | >equal button wont work =( /* * To change this template, choose Tools | Templates * and open the template in the editor. */ package calculator; /** * * @author Gatongay Famiglia */ public class NewJFrame extends javax.swing.JFrame { double plusminus; double firstDouble; double secondDouble; double totalDouble; int plusClick; int …  |
| | I'm currently working on a college Hangman project to build a GUI to ply an external hangman game, but I keep recieving a NullPointerException error. Here is the code for the GUI import java.awt.BorderLayout; import java.awt.GridLayout; import java.awt.Color; import java.awt.Image; import java.awt.Graphics; import java.awt.event.ActionListener; import java.awt.event.ActionEvent; import java.awt.Font; import javax.swing.JButton; … |
| | **My assignment:** Write a program that extends the example that we have done in class. Create a class called Trapezium, which is determined by two parallel sides “a” and “b” and the height “h” between them.The area of the trapezium can be calculated as Area = (a+b)h/2 The perimeter = …  |
| | Hi, I am new to php. I have copied one php application from one linux server to other linux server after copy application is working fine but the applet to view image in that application is showing two error messages. error is : java.lang.NullPointerException at com.primeleaf.viewer.manager.DocumentManager.setDocument(DocumentManager.java:123) at com.primeleaf.viewer.manager.CommunicationManager.init(CommunicationManager.java:76) at com.primeleaf.viewer.DocumentViewer.init(DocumentViewer.java:67) …  |
| | Hello, I am trying to display text(JLabel) above a 3 x3 tic tac toe grid. The JLabel is not displayed. Only the grid shows up. I would be grateful for any help. Thank you! import java.awt.*; import javax.swing.*; import java.applet.Applet; public class Game extends JApplet { LayoutManager layout; private JPanel … |
| | I'm making a paddle and ball game, a bit like pong but instead of another paddle im using the top of the frame, plan to make it into a football sort of game eventually with a bit of work, I have been able to add the ball to the frame …  |
 | Hello everyone! I'm currently having a problem with my program it doesn't loop properly please help me with it. The code is below. Thanks in advance! import java.util.Scanner; import javax.swing.JOptionPane; import javax.swing.*; public class Wewe{ public static void main(String[]args){ Scanner inp = new Scanner(System.in); boolean tryAgain; do{ System.out.print("\nInput username: "); …  |
| | hi folks, im having a problem here on my code can't figure what's wrong.. so here's my code: import java.awt.*; import java.awt.Font.*; import java.awt.Color.*; import java.awt.Button.*; import java.awt.event.*; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import java.awt.event.WindowListener; import javax.swing.*; import javax.swing.JOptionPane; public class Calc extends JFrame implements ActionListener { JTextArea txtArea; static final … |
 | import java.awt.*; import java.awt.event.*; import javax.swing.*; import java.awt.event.KeyEvent; import java.awt.event.KeyListener; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; public class Calculator extends JFrame{ // Declare GUI components private JTextField jtfFirst; private JTextField jtfSecond; private JTextField jtfResult; private JLabel jlblFirst; private JLabel jlblSecond; private JLabel jlblResult; private JPanel entryPanel; private JPanel buttonPanel; private JButton jbtAdd; … |
| | Hey guys I'm having problems figuring out how to write my driver class for my Array class. My questions 1.How do I make the array in my Array class reference the array in my Driver class? 2.How do I pass my class methods from my Array class to my Driver … |
 | Hello, I am writing a chat server application in eclipse ide how i wish to change the jar default image icon but all attempt end either in error or the line of code running with change the icon. here is where i put the code. setIconImage(new ImageIcon(ClassLoader.getSystemResource("chatbutton.jpg")).getImage()); and here is …  |
 | hi all, I need to draw a series (10) concentric circles starting fromt he middle of the panel. This is what I have done, do you reckon it is ok? //Ovals.java import java.awt.Graphics; import javax.swing.JPanel; public class Ovals extends JPanel{ public void paintCmponent(Graphics g){ super.paintComponent(g); //calculates the centre of the … |
| | Hello, I'm trying to fill a shape using TexturePaint in java. However when i'm running the codes i'm having the following errors: Exception in thread "main" java.lang.Error: Unresolved compilation problems: ImageIO cannot be resolved IOException cannot be resolved to a type at Textures. import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.Rectangle; import …  |
| | hi I'm working on my hw and I have problem I know how to read file from data and split each line using array now I want to use arrayList .. I want to read the data from the file and create arrayList and then split each line and create … |
| | Hi All, I have two major problems and they may or may not be linked. My main problem is with an application that I am creating. So far, I have only created the GUI using Netbeans 6.8. When I run the app through Netbeans then everything works fine. However, when … |
| | Hi all, following is the code for a simple but pleasant animation (3000 colourful circles with random sizes etc. bouncing off edges of the app window) What I have problem with is getting the "coef" to be automatically updated on "jSlider1" change in order to control the animation speed Also … |
 | There are 2 sets of 4 buttons being created. The `ImageIcon` of the 1st set of buttons are to be dragged onto the 2nd set of buttons. The boolean `enab` variable is for determining if the 2nd set of 4 buttons are enabled or not. I initially set the boolean … |
| | Here is my code, and i would like to read images from my mysql database and display it over a JButton using the BufferedImage casting into Image. Everytime i want it to display, it would fail to read the data and run to the Exception, may i please have help … |
| | From Class Model: public TableModel getTableData() { TableModel model=null; try { String sql = "SELECT eventID as 'Event ID', date as 'Date',eventName as 'Name', time as 'Start Time' FROM Event"; pst = conn.prepareStatement(sql); rs = pst.executeQuery(); model = (DbUtils.resultSetToTableModel(rs)); } catch(SQLException e){ e.printStackTrace(); } finally { try {rs.close(); pst.close(); } …  |
| | I am coding an image puzzle game and one part of the code is to compare the pieces the user has selected to the pieces of the correct image to check if it is correct. Each image piece is already added to a JButton as an ImageIcon. An identifier is … |
| | Hello, I am getting Identifier expected and Illegal start of Expression erros in this code: [code] //"Math is our Game" - A math testing program for First through Fourth grade students //Import GUI packages import javax.swing.*; import BreezySwing.*; import java.awt.*; import java.util.Random; //import TurtleGraphics.*; public class Math extends GBFrame { … |
| | public class EventView extends javax.swing.JFrame { Connection conn = JavaConnect.ConnectDB(); PreparedStatement pst = null; ResultSet rs = null; private EventModel model; /** Constructor */ public EventView(EventModel model) { initComponents(); this.model = model; updateEventTable(); } public void addEventListener(ActionListener al) { addEventButton.addActionListener(al); } /* public void clearListener(ActionListener cl) { clearEventButton.addActionListener(cl); }*/ public … |
| | I'm trying to display a few Jlabels in the output of my actionlistener. I have a combobox included in the fields I needed added. i attempted to use a Jtable but had issues getting the selected item from the combobox. I choose to this method because I had already had … |
| | Hey Guys , can i just get some help with my dialog box , a sterr in the right direction wil be brillant . Thanks guys import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.ButtonGroup; import javax.swing.JButton; import javax.swing.JCheckBox; import javax.swing.JDesktopPane; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JMenuItem; import javax.swing.JOptionPane; … |
| | new to I.T. need help about the problem analysis ,algorithm design, formatting the output package gasolinestation; import javax.swing.JOptionPane; public class GasolineStation { public static void main(String[] args) { float total, money; String yesno; JOptionPane.showMessageDialog(null, "Welcome to Gasoline Station!"); do { String select = JOptionPane.showInputDialog(null, "1 = Diesel .................... $ 39.00\n" … |
| | Hello if anyone can help I would like to know why I get this error when executing.. exception in thread "main" java.lang.NuSuchMethodError: main [code] import java.awt.*; import java.awt.event.*; import javax.swing.*; public class GridLayoutFrame extends JPanel { // These are the components private JButton FindB,AddB,RemoveB; private JLabel theOne,theTwo,theThree,theFour,studentID,theMidTerm,theMidterm,theFinal1,theFinal2,FinalG1,FinalG2,FGrade2; private JList studentNumbers; … |
| | This is my Problem, Please Help me :( The Library class would include data members such as ID, Date of Aquisition, descrition, number of copies, title and instance method such addItem() and retrieceItem() also accessor and mutator method aree needed to access data members. These are variables and methods common …  |
 | I am creating a simulation of a virtual video player (something like a very basic version of RealPlayer or Window Media Player). All the codes given below are error free. This is the main class: VideoPlayer.java This is the video player GUI (this frame is not resizable and the X … |
| | Hi, sometimes when I run my application the cmd pops up with the following list of errors! I am sorry to just drop them like this but I dont know how to deal with them, as the application is working just fine! Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException at javax.swing.LayoutComparator.compare(LayoutComparator.java:75) at … |
| | how to change image when button is clicked? my gui is consisting of three Button(NEXT,PREVIOUS,AUTO-CHANGE) and 1 Jcombobox. when you drop-down combobox list of image is shown.so i want when i clicked on "next" button image of jcombobox should be change. |
| | Hello all. I'm currrently working on a GUI that needs to support dragging some application-specific objects from a selection area onto a work area (JPanel). It's currently working in a "click where to place the object, then click the Add button" mode, but that's not good enough. The obvious approach … |
 | Jython is a version of Python that can use the extensive Java library. Jython uses Python syntax and avoids the rather ugly syntax (at least for Pythonions) of Java. Here we apply it to bring up an image from a file. |
| | Dear all, This example is compleet ,but wont load the file. Can anyone help me with puzzle?hier is the code: Class ATMWindow import java.io.IOException; import javax.swing.JFrame; public class ATMWindow { /** * @param args the command line arguments */ public static void main(String[] args) { if (args.length == 0) { … |
| | I am trying to create a GUI app were the user inputs an, item name, price, and discount rate. The button should calculate the two numbers and display the discount price. I am stuck on the action listener and making it preform the action/calculation correctly. I am a pretty novice … |
| | I am finding it difficult to update the `JTable` when I enter a person's name in search button. The program compiles correctly without any errors, but in `SearchActionPerformed` event when the search button is pressed an empty table comes up. Where without search, the table is full of values from … |
| | HI all, I am having a little problem with the following program. Here are the files: Player.java: import java.text.DecimalFormat; public class Player { private String name; private double average; public Player(String name, double average) { this.name=name; this.average=average; } public String getName() { return name; } public double getAverage() { return … |
| | Hi, I have something wrong at table_academicMouseClicked() method which results me with a java.lang.NullPointerException error. basically trying to compare the surname in Jtable and look it up on the database to select the corresponing record so that I can set the label to the value from database. So when a … |
| | Hi, i'm making a server client piant program that send what is painted on the server to the client(and vice versa). this program is supposed to use instruction based transmission of the image. i have a server client program that sends what is drawn on the server to the client … |
| | This is my program so far: package allin1; import javax.swing.*; import java.awt.event.*; import java.awt.*; public class Allin1 { JFrame frame = new JFrame(); JPanel panel = new JPanel(); JButton b1 = new JButton("Exit"); public static void main(String[] args) { panel.add(b1); //THIS IS THE PROBLEM?? } } The error I am … |
| | I am unable to execute the editProfile() method in MainMenu class. The purpose of the method is to be able to extract the bean values and display them on the empty textfield. I am not sure if i did it correctly. any recommendations for any changes to editProfile() method. public … |
| | My aim is to fill a 3x3 grid of Jtextfield in java swing with values and position of entry in that grid sourced from a text file.I made a file named aa.txt. Its contents are:- a1-3 b3-9 c2-4 a1,b3,c2,... are names of textfields in grid and numbers separated by hyphen … |
| | I am attempting to make a TicTacToe in java using Swing. Instead of using buttons for mark(x and o) placing on 3x3 grid, i used textfield(variable name- pos) to specify position of mark entering and another textfield(var name- val) to take value to insert it into the position which i … |
| | I have this paint program and i'm having a very silly problem. I'm trying to set the paint area to west position using border layout but when i do that it doesn't show up when i run the program. if i set it in the center it shows up. everything … |
| | So, I'm trying to make a game of tic tac toe using JFrame and JPanel. This creates the board image 3x3 . package book; import javax.swing.JPanel; import java.awt.BasicStroke; import java.awt.Color; import java.awt.FlowLayout; import java.awt.Graphics; import java.awt.Graphics2D; import javax.swing.JButton; public class Beginning extends JPanel { public void drawBoard(Graphics d){ int r … |
 | I am attempting to write a very simple chat program to test out ServerSockets and Sockets, the code should work, but when the client make a connection to the server it does not move past the accept method. I know they connected because as soon as I close the client … |
| | i've done an application with two JTextField with the autocomplete feature the application works fine but On clicking the Tab Button while the mouse pointer is on the first TextField the Mouse focus is not going into the second Textfield but gets the focus on the second time. i.e for … |
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