36,051 Topics
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| | how to display the randomly selsected questions from a database one at a time in jsp like in online quiz.please help me  |
| | Hello everyone, im writing this post because im in need of some help or guidelines. My programs function is to be able to store cars, with this i mean being able to: add, delete and view the list of cars added. Everything is supposed to be stored in a txt …  |
| | Hello, Stuck on one line of code, tried everything but could not make any progress. Please help. Thanks in advance. The problem is on line 39 which is: slant_height = SphericalCone1.getSlantHeight( radius, cone_height) ; TheNetBeans IDE6.8 displays the error message: Can not find symbol: class SphericalCone But SpericalCone class compiles … |
| | I have a homework assignment that's due in a couple of days and I need a set of experienced Java eyes to confirm that a few of the answers to the questions below are correct. The hard part about these questions (for me anyways as a newbie Java person) is … |
| | I'm new to Java and can't seem to understand why this code doesn't work. Any input would be appreciated. Thx. [code]Public class MyClass int a; float b = 1.5; public void static main(String args) { MyClass mc = MyClass(); mc.a = 1.5; system.out.println(b); }[/code]  |
| | Hi developers, I'm not sure if this is possible, but I've tried to add database elements to a list box. There are no errors shown, but it simply does not work. Here is the code below: [CODE] if(criteria1 == 1){ getDBConnection(); try { stmt = conn.createStatement(); if(stmt.execute("SELECT Clients.Firstname FROM Clients … |
| | I wrote this java program that performs functions of a vending mention. But now I need to write it using methods, how can I do this? Here is my code: (Any help would be greatly appreciated! [CODE]import java.util.Scanner; import java.util.Random; public class VendingMachine { public static void main(String[] args) { … |
| | Hi all! I'm writting a little application and I'm triying to give it a feature where the user can move the Mouse over an component(JButton) and gets a little explanation what the Button does if pressed. I have an Rectangle for every component I use to set the bounds of … |
| | hello friends I have a large table which contains the large text data. the table cell shows the value as for example if value is "Hello Friends" it shown in cell as "Hello Fr". which cuts the value so want to display this complete value in rectangle like joptionpane (I … |
| | I`m trying to use sets and gets for a code, but it`s not compiling I`m not sure how to set and get a String, this is what I have so far this is class Car [CODE] String color; void setColor(String col) { color = col; } String getColor() { return … |
| | This is the hardest thing I have tried yet. I am not adding ti as part of the main programme I am doing at the moment cus otherwise it would be too hard to debug. So I have created this as a separate file. I am trying to get a … |
| | here is the code for displaying the content of the database if a run the file 'java listall' then it will work well but when i try to run the code from the main class with the help of JButton list as if(ae.getSource() == list) { System.out.println("list working"); new listall(); … |
| | I have changed the Path Environment Variable for Windows Command Prompt to: C:\j2sdk1.4.2_04\bin so why, when I try to run javac while in the code folder directory, do I still get the error message "javac is not recognized as an internal..." I was forced to put the path info in … |
| | hi every one, i am working in a web content filtering program, i need a help in what is the efficient way to block the web sites, and how to capture the images from the response return to the request done by the web browser to do image analysis, plz … |
| | i want to send value to another jsp page from sessions i add the attribute session=true in both jsp pages but i am getting error during running mode can u find any errors in code [B]try123.jsp[/B] [CODE]<% String val=(String)session.getAttribute("itemValue").toString(); %> <TD>IMAGE NAME</TD> <TD><INPUT TYPE=text NAME="img" VALUE="<%=val%>"></TD> </TR> <tr>[/CODE] [B]try.jsp[/B] [CODE]String … |
| | i have a main java code called home.java which is an interface. when i press button BTNSTART , i want d progm WebCam.java to exxecute. but it's giving me an error saying : [B]ERROR[/B]: home.java:146: cannot find symbol symbol (constructor WebCam()) the code home.java : [CODE] import javax.swing.*; import java.awt.*; … |
 | I'm Taking a Class on Java at my Highschool, but my teacher goes very slow and I need a quicker pace. Could anybody so kind as to give me a list of simple classes and commands so that I could work with them. Also does anybody know a Good program … |
| | -------------------------------------------------------------------------------- I have this test working where it takes data from a Java class and shows it in a JSP: [code] String targetItems = "test" List pageItems = New ArrayList; for(int i = 0;i < calculatedResults + 10;i++) { pageItems.add(targetItems + " " + i) } request.setAttribute(pageItems, "pageItems");[/code] I would … |
| | Hi I am a J2ME developer I am new to Dani Web. I am using chartapi.finance.yahoo.com to calculate and display chart. My questions is how to convert TIMESTAMP value to a Java Date or Calendar Object ?..... For Eg: URL GIVEN BELOW [URL="http://chartapi.finance.yahoo.com/instrument/1.0/aapl/chartdata;type=quote;range=1d/csv/"]http://chartapi.finance.yahoo.com/instrument/1.0/aapl/chartdata;type=quote;range=1d/csv/[/URL] Its output will be uri:/instrument/1.0/aapl/chartdata;type=quote;range=1d/csv/ ticker:aapl unit:MIN … |
| | I will start a new project. But I have some simple questions about it : 1) Is the C faster than Java on processes which has no graphic user interfaces (like softwares which are working just from command line) ? 2)Because if the C is faster than Java, I want … |
| | [B]Hi, I want learn the process of coding from scratch for the development of face,hand,human body tracking.... Where can I get the learning resources???? Thanks for ur replies..[/B] |
| | hello please help me on this how to make the log in password in gui that can accept at least 6 characters and not more than 10 characters..and if i will re enter the password and it will prompt to the user that password is already exist..hoping for your positive … |
| | how we set a voice which is giving instruction like "Enter two number" "your result is this" |
| | i am new to this technology. now i am preparing what is the value of (byte)0x80 and another thing is difference between and using of b [] and b( ) |
| | Does enabling Java in my browser put me at risk of getting a malware infection? How about Javascript? |
| | I need to write a program that accepts coins(nickles, dimes, quarter) and single dollar bills, dispenses the item and returns change if the deposited money exceeds the item's value. There are 5 items with the prices of: 65 cents, 95 cents, 50 cents, 110 cents and 75 cents. There is … |
| | Hey. I have an arraylist; [CODE]public static ArrayList<String> name = new ArrayList<String>();[/CODE] and its made of of names; [CODE]public static String name;[/CODE] They both had to be static as it didn't work if they weren't. In the public void static main method, I populate this arraylist. I then want to … |
| | Hello everybody! I use the actiWATE library for one project. This is a code file Main.java [CODE] import bro.bro; import java.io.IOException; import java.io.UnsupportedEncodingException; public class Main { public static void main(String[] args) throws UnsupportedEncodingException, IOException { bro doBro= new bro(); } } [/CODE] file bro.java [CODE] import com.actimind.actiwate.http.HttpResponse; import com.actimind.actiwate.testing.ActiwateTestCase; … |
| | First, I want to say that I am Java beginner and I do not have a lot of experience. This is my 2nd program. My objective is to write a program using stacks to see if a line inside of a file such as test.txt has matching scope symbols such … |
| | Hi, I need one of my assignments to be done in C or C+. Need someone who can do the assignment for it. Need it urgently..need the assignment done by sunday. Will pay money for doing the assignment. Please email me immediately <<Email Snipped>> thanks Raj  |
| | Hi, I am struggling to read ( Hex )bytes from TCP port and write to a file. If someone can help me, I will aprreciate. Thanks, |
| | I can not figure out how to add to my array. The invntory class and dvdrate subclass is not to change. So within my InventoryProgram2 I am told to copy a temp array with the addition of an element to the actual array using the add button. This is so … |
| | Hi I am using netbeans and mysql. I am trying to run the an inventory system. I have linked the program with mysql. The program is running but when in log in page I input username and password which is preinstalled in mysql and then press submit, its not going … |
| | Hi everyone, Apparently I'm very bad at this whole programming thing, but, nevertheless, I am currently in a CPS course and in dire need of assistance! I have 3 objects set up: TwoNumbers, TwoNumbersTester, and Test. When I build the code, it's all fine. When I run the code, though, … |
| | The program which is executing in windows has occurred error in linux. The program is on the jframe which is designed by using swing controllers is executing with error free in windows but when i use to execute the same program in linux an error as [B]GroupLayout [/B]error is occurring. …  |
| | What is the difference between the following two interface. How does the term "abstract" used along with an interface makes it different?. [CODE] abstract interface Bendable { } interface Bendable { } [/CODE] |
| | i hav cod to redirect to two different pages but one cod is working and one not one form enctype is urlencoded which is default is working and other with enctype=multipart is not working plz help i googled about this but nothng works so i came here 4 d sol … |
| | I have a class KeyCards.java that just sets up a panel (gui) with labels,combobox and text fields when the combobox is selected a class generates strings to send to a class public Class Progressions extends KeyCards and puts the strings in setters. once all the strings are there it calls … |
| | Hi, I'm a freshman and I just started programing. I have an assignment due soon, and it's almost finished. My only problem is there is one build error that tells me ".class expected". This is on the same line as a for statement... and that really confuses me. Here's my … |
| | Does anyone know where I can find information about writing a java application for a file dump utility, a java program that will read a file and display the contents of the file in a byte by byte format? I am lost on this one. |
| | Hey everyone~! I am having a major issue understanding class casting. I thought I understood it, but I found 2 problems in my Barron's book that seem to contradict in their explanations. Can someone please explain the distinction between these two problems??? [B][U]Problem 1:[/U][/B] [INDENT] Bird = Super class Owl … |
| | Hello , am new here and i need some help in finding prime numbers.....I actually wrote this code below and it compiles but it repeats sequence with some numbers or most, plus if you run it you will see that the prime numbers are printed as prime numbers only but … |
 | java.awt.image.DataBufferByte cannot be cast to java.awt.image.DataBufferInt.. how do resolve it... |
| | To avoid malware infections, should I permanently disable Java and ActiveX in Internet Explorer? How about Javascript? If I should also disable Javascript, should I just disable Active scripting, or all options? But I don't also need to disable any of these in Windows itself, right? |
| | Hello, i am just starting with Java and one of the programs is, to make a long story short, evaluate a computers power (pretend). you put in how many applications you want to run, what operating system and what power your computer is and it tells you whether you can … |
| | Hello, I am studying for SCJP 6 Exam, and came across this question which shows code as asks for the output [CODE] 3. public class Ebb { 4. static int x = 7; 5. public static void main(String[] args) { 6. String s = ""; 7. for(int y = 0; … |
| | Why is it that when I invoke the Derived constructor from the main method, I get a compilation error pointing to the Derived constructor of the Derived class. I never called the Base constructor of the Base class. Therefore why is the error happening?. [CODE] class Base { private Base() … |
 | Hi, My assignment is to write static methods to give the following output: - Lists of all the sequences, all the perms, all the sets, and all the multisets with n=5 and k=3. -The [I]N Queens Problem[/I] considers how many ways n queens can be placed on an n by … |
| | Hi all, I've got a main form, and a secondary form (this being a list from which I pick a number). I can store values as "global" variables - so as to bring the value across different classes. Also I've managed to get the main JFrame to display the value … |
| | Hi, I have another question. What is the advantage of arraylist over vector. Why arraylist is widely used instead of vector in java programming? Thanks in advance..... |
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