32,199 Topics
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| | 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.*; … |
| | 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 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 … |
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