36,051 Topics
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| | I can turn on anti-aliasing, but whenever I draw stuff the arguments are still ints, not floats or doubles. How can I change this? |
| | Well i intended to develop a sohisticated java server client program . but just couldnt push myself so far so ust had to satisfy myself with it. Well , i have created a simple chatting interface . i would not call it a chatting interface actually cuz i had something … |
| | Hi! When I try to run the code [ICODE]tableModel.setQuery("select l_code, l_title, l_description from Lists");[/ICODE], then I receive the following error: [CODE] java.lang.ArrayIndexOutOfBoundsException: 0 >= 0 at java.util.Vector.elementAt(Vector.java:427) at SystClasses.QueryTableModel.getValueAt(QueryTableModel.java:72) at SystClasses.QueryTableModel.getColumnClass(QueryTableModel.java:53) at javax.swing.table.TableRowSorter.useToString(TableRowSorter.java:224) at javax.swing.DefaultRowSorter.updateUseToString(DefaultRowSorter.java:607) at javax.swing.DefaultRowSorter.sort(DefaultRowSorter.java:556) at javax.swing.DefaultRowSorter.allChanged(DefaultRowSorter.java:816) at javax.swing.DefaultRowSorter.modelStructureChanged(DefaultRowSorter.java:826) at javax.swing.JTable.tableChanged(JTable.java:4364) at javax.swing.table.AbstractTableModel.fireTableChanged(AbstractTableModel.java:280) at SystClasses.QueryTableModel.setQuery(QueryTableModel.java:110) at SystClasses.Form.createAdminTable(Form.java:747) at … |
| | Hello all, is that possible to help me out with Error Checking for user input? I am developing a peg solitaire program and now need a error checking for user input or for input file. Either use try and catch.. or making another method.. can anyone give a me a … |
| | I have to create all the method signatures in the ResizableArrayList and then fill it in with comments. And each method is supposed to be blank with a return null or --1. How do i do this?  |
| | Hey, I've gota make a program that reads characters from a text file, produces the Huffman code tree, and prints the codes for each character in the file. I've already written the code to read chars from a text file, but the Huffman code tree is the part I'm a … |
| | I have to create all the method signatures in the ResizableArrayList and then fill it in with comments. And each method is supposed to be blank with a return null or --1. How do i do this? |
| | Here is what I need to do: have three editable text fields labelled operand1, operator, and operand2, and a fourth read-only text field labelled result. Have a button labelled Calculate. WHen the button is clicked the appropriate operator is applied to the two operands and the resulting value placed in … |
| | Hi all, I'm having a bit of a problem implementing a GUI and have no experience in multi-threaded programming. Here's the what I need to do: -Open GUI with file chooser -After user has selected 2 files, return control back to Main, along with an array of the selected files/file … |
 | i want to write a a program that will accept student name and grades and output it.use an array data structure in the implementation this program and implement the following write method that will traverses the array and allow the user to perform the following processes a) search for a …  |
| | The problem is Design a class named Person with fields for holding a person's name, address, and telephone number. Write one or more constructors and the appropriate mutator and accessor methods. Next design a class named Customer, that extends the Person class. The Customer class should have a field for … |
| | Hello I'm having trouble extending JPanel. I know how to extend JFrame but my assignment calls for JPanel. Here is what I have: [CODE]import java.awt.Color; import java.awt.FlowLayout; import java.awt.Graphics; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JTextField; public class Guess extends JPanel { private … |
| | I'm trying to organize my frame so that I have two panels, one on the left and one on the right, sort of like a website design with buttons on the right and empty text area on the left. How in the hell is this accomplished? I've been screwing around …  |
| | Hi.... I have made this code for my college project but don't understand why i am getting some errors like 2 Error : java.sql.SQLException: [Microsoft][ODBC Driver Manager] Invalid cursor state (This error occured while checking availability of seats...) Also the Report section of project is not showing anything can anybody … |
| | Hey guys! So, I created this form, but I can't seem to add color to it. I'm trying to make it color red. I've been trying to change the color for 2 days cuz I'm a noob :) Thanks guys! Here's code by the way: [code] import java.awt.*; import java.awt.event.*; … |
| | For PHP its MySQL For ASP its SQL server These are default databases. Likewise which db we use for JSP?????????  |
| | Hi friends, I am doing Bachelor's Course In Computer Science Engineering. Recently I recently completed my course on Application Development and Database Management. Coincidentally a few days ago I was asked by my friend to do a simple software for managing his store. So, i thought I got an opportunity …  |
| | Hi friends, I am doing Bachelor's Course In Computer Science Engineering. Recently I recently completed my course on Application Development and Database Management. Coincidentally a few days ago I was asked by my friend to do a simple software for managing his store. So, i thought I got an opportunity … |
| | Ok, im gonna go ahead and just paste most of the stack trace in, (its massive) : java.io.NotSerializableException: com.sun.java.swing.plaf.windows.XPStyle at java.io.ObjectOutputStream.writeObject0(Unknown Source) at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source) at java.io.ObjectOutputStream.writeSerialData(Unknown Source) at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source) at java.io.ObjectOutputStream.writeObject0(Unknown Source) at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source) at java.io.ObjectOutputStream.defaultWriteObject(Unknown Source) at javax.swing.JComponent.writeObject(Unknown Source) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at … |
 | Im currently running out of ideas at the moment and need some suggestions or ideas. [B][I]The alert (a popup) should be generated when the time at which the call-back time has been requested is in 1 minute from the current time.[/I][/B] My current program uses a while loop which keep … |
| | Hi, Does Java provide any API that enables the communication between the Java GUI and an FPGA or any other hardware device? Cheers |
 | What is the difference between writing a application java program and a java program? I was asked to write an application java program and then I was asked to write a java program(s). Which is just one program and which is the one with that has to have two files … |
| | Dear friends Please give me the JAVA CODE FOR CONVERTING COLOR IMAGE TO GREYSCALE IMAGE and creating the histogram of that greyscaled image .Including header files also... Anyway thanks in advance May GOD blessyou bye.... |
| | i have these 2 selections Code: [code] <select id="rooms" name="rooms"> <option>Please Choose</option> <option value="1" >1</option> <option value="2" >2</option> <option value="3" >3</option> <option value="4" >4</option> </select> <select id="type" name="type"> <option>Please Choose</option> <option>Single - 50£</option> <option>Double - 60£</option> <option>Luxury double - 70£</option> </select>[/code] i would like to give these values single:50 double:60 …  |
 | Hello to all (",) Basically, I have a JSP page. What I want is to determine the screen resolution of the client machine that is viewing my JSP page. I tried using a JavaBean to do this but Im not getting the results I wanted. So I use JS. My … |
| | I am doing a project on developing a one time password system. In that, I have to encrypt a counter value and secret key together by HMAC SHA 1 algorithm. But the counter value and key need to be stored very safely on the server. Is there anyway by which … |
| | I have to create a class that will pick partners at random for my class tomorrow, out of the people that are in it. What I have so far is simple enough... [CODE]import java.util.*; import java.util.Random; public class GetPartners { public GetPartners() { } public void getPartner() { String[] names … |
| | So to briefly explain my situation, I'm creating a DateChooser inside of a JComboBox. Most of them have these stupid little arrows to skip around through the years and months, like this one: [url]http://undocumentedmatlab.com/images/JIDE_DateChooserPanel.png[/url] But I want a drop-down list of the 12 months instead of arrows. So, I have … |
| | How can I change the code below to applet? [CODE] import java.awt.*; import java.math.*; import javax.swing.*; import java.awt.event.*; public class Timer extends JFrame { JButton start = new JButton("Start/Reset"); JButton stop = new JButton("Stop"); JLabel time = new JLabel("Time"); javax.swing.Timer timer; int count = 0; public Timer() { super("Timer"); addWindowListener( … |
| | Hello! My JTree is filled from DB. If I add a new node, and then try to delete it, then the code shown below provides an error. As I see, selectedFolder is sometimes null. Why does it happen? Why [ICODE]getLastSelectedPathComponent()[/ICODE] doesn't return a node selected, but returns null in some …  |
| | I can't seem to get my access to the private xCoor and yCoor. I try couple of things i just learn in school but none of em make sense. Can someone explain and tell me a way to get access to those xCoor, yCoor, width, and height while still leaving … |
| | I am trying an example from my CS class. We learned recursion recently, and one of the examples I was given was to reverse a given string. The Java program compiles correctly, but when it is actually executed, instead of getting the intended result, I get this as my outcome. … |
| | I'm doing active rendering for a game, and I was wondering,,, Does drawing outside a canvas still use just as much CPU? As in, If I draw one rectangle, and then draw another outside the canvas, does it ignore the other rectangle, or waste CPU on it? I want to … |
| | Hello there! I am new to Java and DW, though I usually find great help already here! Say I need a constructor that accepts [COLOR="red"]variable number of parameters[/COLOR] up to 2 parameters, but if I pass only one parameter to this constructor, both parameters will take this number, and if … |
| | Hi, I've been working on this for two days. I need to pass an arraylist to another class. It gets the information, and will print out the menu, until the program goes back to the initial class, then the list empties. I don't get it, and I'm so confused. [CODE]public … |
| | Hi! I want to delete an empty directory from FTP Server, however my code works only for files. Let's say the root directory in my FTP Server is called as [ICODE]Documents[/ICODE]. I want to delete a directory [ICODE]Director[/ICODE]. Then I execute [ICODE]client.deleteFile("\\" + selectedPath);[/ICODE], where [ICODE]selectedPath[/ICODE] is equal to [ICODE]Documents\Correspondence\Finance\Director[/ICODE]. … |
| | Hi! How should I change the TableModel that extends AbstractTableModel to allow displaying empty data sets? Should the getValueAt method be chaged as follows? [CODE] public Object getValueAt(int row, int col) { Object str = ((Object[]) cache.elementAt(row))[col]; if (str != null) return str; else return ""; }[/CODE] ...or something else … |
| | Hi! how could I delete all spaces in the string: [ICODE]String str = "AAA BBB CCC";[/ICODE] in order to get "AAABBBCCC" as a result? The following doesn't work: [ICODE]str.replaceAll(" ", "");[/ICODE] Thanks! |
| | hi i got one problem to solve am almost did but facing problem for my last for loop iteration can any one help me this is the problem i received University of Newcastle School of Electrical Engineering and Computer Science SENG1110/6110 Programming Assignment 1 – Semester 1, 2010 Due: By … |
| | Hey guys, I have a problem I can't seem to figure out properly: I have to implement a mirror in a java applet. For the mirror I used a second window. what I don't know: -how to rotate the second window -how to make it mirror what's in front of … |
| | Hello folks, For my final project I decided to write an online poker game. Long story short I'm having trouble with a class I wrote to manage java.net.Sockets. The source for this class is: [CODE] import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.PrintWriter; import java.net.Socket; import java.util.Iterator; import java.util.LinkedList; public … |
| | **CHANGE PANELS IN TITLE TO Grid Layout I first want to apologize for filling the board with a noob question but I don't know how to phrase my question on google. So here we go! My prof has us working on GUI programming. I am trying to split up my … |
| | Ive been trying to make a program that should keep the status of a hotel room layout. main method should return this: [url]http://img202.imageshack.us/img202/969/layoutview.jpg[/url] the cells should also be painted green if they are available for renting Yellow if they are booked or red if the are not available one class … |
| | hi everyone i am working on internet banking project. I have an little idea about the project what are the functionality to implement and I am not perfect in web technologies. But I'll work hard on this project. My major problem is I am not getting where to start it … |
| | An error called outofmemory error is coming up when I am giving nums value > 1. I have underlined where num comes. The strings bla1, bla2 etc, I gave for identifying the error. private void generateMouseClicked(java.awt.event.MouseEvent evt) { String s = new String(); String o = new String(); boolean check … |
| | I have written a piece of code, everything is fine until i run it, i get [CODE]"Exception in thread "main" java.lang.NullPointerException at useCADSL.main(useCADSL.java:5)"[/CODE] i know what it means, i just cant see where to modify [probably the whole you read what you think you've wrote thing] my first class is … |
| | Hi everyone, I know you probably see a hundred of these during this time of year, but I have a project going at uni that requires us to create a string based hangman game from scratch. It's not anything fancy, and the game itself isn't too complicated, but where I'm … |
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| | helo everyone......... could anyone of you please explain me the concept of ARRAYS. another doubt.........can anyone of you just give e the basic lgic ofbinary search, linear search, bubble sorting an selection sorting!! specially binary search and linear serch the concept i have not understod proprly!! and a smal program … |
| | Hi guys, i have a String time 23:00, how do i subtract it against a String today's time and get the remaining minutes? do i parse the String into a date type? any ideas is appreciated, thanks. [CODE] public String getTime() { SimpleDateFormat sdf = new SimpleDateFormat("kk:mm"); Date s = … |
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