32,204 Topics
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| | Hello, I am new to java. I want to display the database records in JComboBox. I have 2 combo boxes. say color and object,whenever i'll select any color from combo box, next combo box should display the objects of that color. I have write one code for it, I use … |
| | [I]Hi, Sorry for coming back again and adv thanks for guidance My tutor gave me a assignment, couple of days before he taught me the work flow of java in eclipse, i am getting through it and i was asked to use constructors for the arithmetic operations as methods in … |
| | Why is the output 10 and not 9?. According to my understanding the count value is assign to b. Then the count value increment. Hence the output should be 9 instead of 10. However in this case the output is 10. Why?. [CODE] package com.nowhere.blogger.core.junit; public class Bunnies { static … |
| | Hi All, I was wondering if any of you would know of how can i change the interface of a java program to a web based interface using html5. I know i could do this easily using jsp/java.net but my requirement states to change the java desktop program application interface … |
 | Hey; I am following CoreJava and came to Event Handling chapter. I am trying to show a popup menu when the red button is clicked, but not works. Background color changes but no popup menu is shown. What is the problem? [CODE]/* * To change this template, choose Tools | … |
| | I've been coding in Java for about six years now (personal projects only). I follow the... [I]Java, How to Program[/I] (Deitel, 5th ed.) book. For a particular project, I've coded several Record structures, each in their own class file. Is it possible to put ALL of my Record structures into … |
| | hello all members! i have just written a java application about menu. i got error that: cannot find symbol. could you all tell me all possible causes of this problem. i have tried to follow some of instructions on internet, but no help. thank in advance for your help. p.s: … |
| | Hi, So I just done this class for the semester but am still having this problem in the back of my head that I need your help to clear it out of the way. Basically, the program here about covert the Octal number to Binary number which Octal number will … |
| | [url]http://sparrow.ece.cmu.edu/~adrian/projects/secure-routing/ndss03.pdf[/url] I want to know if we can implement this paper entirely with java.It is a security mechanism for routing protocols---we cannot afford routers so thinking of simulating them.  |
| | @NormR1 or anyone please help, This program is to convert the input octal to output the binary in multiple number within the octal (ex: 24546, not 4 or 2 in single input)using an array. Thanks I converted it to integer, but how do I read one integer at a time …  |
| | Hi, i was wondering if anyone can help me. i am new to php and was wondering if it was possible to embed javascript in php. i was trying to get an alert/msg box up to explain an error to the user. i have written the following code <?php ............. … |
| | Hi everyone, I've been working on this for a couple of days now. I need to make sure that an error message is given if txtname has a numerical value in it, and I also need to make sure that an error message is given if txtscore has a non-numerical … |
| | Hi, Now i'm doing my Machine Learning job about k-NN and k-Means. I need to create graphics about my data coordinate. Basically, i don't have any idea to create this. Is there anyone can help? |
| | Hi..! i need to make a trial period software. Do anyone knows how to do it. I have gone through many links and still searching in google, but everywhere i found only some points mentioning about the way of doing it, but no one explains about how to do it... … |
| | Hi guys, I've been working with a project that requires me to use mutiple jcombobox. I did try to relate three jcombobox but failed to show all necesarry drop-down lists. in one of my combobox I have lists of Banks (Bank1, Bank2), the other one is the list of all … |
| | Dear All, I have string where I want to get its checksum value specifically using crc-16 (modbus) in java. Any help or tutorial on how to do it? I saw some links saying lookup tables but I am not quite sure about it. Thank you. |
| | Dear All, I have snippet of code as below. It is a listener which is waiting for the data so I use local to telnet to this program in the same machine. Nothing gets printed unless after sending the data I press enter. On the other hand if I use … |
| | Hi, Trying to get this bit of code to work so that a train goes up the track, leaves the track and then a train comes down the track, leaves and then a train comes up the track and so on. Only one train is allowed to go onto the … |
| | hey i am new here i am working on a school project where i am building an applet.. i have encountered a problem i cant solve, i have 2 classes... the first class i very simple it has to methods which return an string array for table column and Object … |
| | Alright, I have the bad practice of not commenting my code very often when I write it so I'm going to try to explain what the problem is as clearly as possible. In this program I have to set up a battleship like grid of buttons. In order to determine … |
| | please if any one has java tutorials for the beginner programmer in java (sites , vedios ,etc..) |
 | So I imported a project over from my school comp, and it seems to run ok, but I got these errors, and i don't know what they mean, or how I can fix them. [IMG]http://i421.photobucket.com/albums/pp296/rskom/issue.png[/IMG] Thanks for the help! -Austin |
| | Hello. I am New Here and This is my First Post :) I'll Start with a Question, That is I know java, But not much. And I know how to build a Program if some one tell me to make a program that calculates area of a Square and something … |
| | Hello guys i've been learning java for a short while and have come upon a problem which i cannot seem to solve. I have a boolean array of 11 values, now i want to prompt the user into entering the number 1 or 2. If the user enters 1 I … |
| | Hi, I'm trying to set a background image of a JFrame. I researched on google but i haven't gotten anything to work. My idea is to make monopoly with the board in the background and have the pieces move around on top of the board. Thanks in advance  |
| | Hi all I am having a problem with my method in my linked list class to split linked lists into two sublists. The issue is that for some reason my first sublist has 3 more elements than the second sublist when I split a linked list with a total of … |
| | So im setting up this gui, but im getting this Nullpointer exception: [CODE]Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException at addressbook.dnDisplay.jButton1ActionPerformed(dnDisplay.java:222) at addressbook.dnDisplay.access$600(dnDisplay.java:22) at addressbook.dnDisplay$7.actionPerformed(dnDisplay.java:128) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995) at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318) at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387) at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242) at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236) at java.awt.Component.processMouseEvent(Component.java:6289) at javax.swing.JComponent.processMouseEvent(JComponent.java:3267) at java.awt.Component.processEvent(Component.java:6054) at java.awt.Container.processEvent(Container.java:2041) at java.awt.Component.dispatchEventImpl(Component.java:4652) at java.awt.Container.dispatchEventImpl(Container.java:2099) at java.awt.Component.dispatchEvent(Component.java:4482) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4577) at … |
| | Below is how I set up my JFormattedTExtField. The database (derby) will take the format no prob. The db will then change the form to yyyy-MM-dd If I follow that format from begining to end the JFormatted Field will be fine. However, when a date is queried from the database … |
| | I override the equals method in the Friends class, yet I do not see the value "Spring 2002". Rather I see the value "null" instead. Did I miss something in my code? [CODE] package com.n2n.blotter.core.junit; import java.util.*; public class Birthdays { public static void main(String[] args){ Map<Friends, String> hm = …  |
 | i have encrypted some login credentials in mysql database using md5, now i want what i input as login credentials to be encrypted automatically to ease comparison with the encryption in database: This is how far i have done, no errors bt i cant login anymore [CODE]try { Class.forName("com.mysql.jdbc.Driver"); Connection … |
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