36,051 Topics
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| | I am new to java programming. I am trying to create a GUI which includes JLabels, JPanels, JButton, text fields and labels. I am not using layout manager. Is there a particular structure in laying out the code that I should follow.? Thanks .  |
| | Hello I am learning JSP authentication and am having issues. I think my code for this simple test looks pretty good but everytime I try to login I get my login error page: web.xml <!-- Define security roles --> <security-role> <description>administrator</description> <role-name>administrator</role-name> </security-role> <!-- Restrict access to all files in … |
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| | Hello! I am working on a server program that has a connection to a MySQL database. In one of my sql:s i need to use [URL="http://dev.mysql.com/doc/refman/5.0/en/user-variables.html"]User-Defined Variables[/URL] but i can't get it to work. The sql looks something like this: [ICODE]"SET @rank=0; SELECT id FROM (SELECT @rank:=@rank+1 AS rank ..."[/ICODE] … |
| | ** Having trouble running this code as the compiler keeps having issues with the method 'public void mannipulate()', I'm new to java so forgive my ignorance, but I've been trying to rearrange everything in every which way to please this thing and its just not turning out right. I'm sure … |
| | How exactly would I go about doing the following in C#? public class Test { public static void main(String[] args) { Test(new TestInterface() { @Override public void SomeMethod() { //create instance of the interface within parameters of a method. } }); } public static void Test(TestInterface _interface) { } } … |
| | please give the code for searching a value from mysql databse in jsp page?... i created **1.search jsp 2.searchAction.jsp 3.searchBean.java** and created **DBConnection.java** for db connection and i need to view the search result in new page which is **searchresult.page**  |
| | Lets say we have an 1d array called array. Now I know array.length gives me how many primitive types or objects are in a 1d array but what does it do for a 2d array with rows with different rows? {1, 2, 3, 4} array.length would be 4 but if … |
| | Hello, Iv been working on a project in java and i want to implement an export to HTML 5 feature. I have looked around and not seen many useful discussions on how to implement this feature. A number of software products i looked into such as scirra construct and adobe … |
| | hi friends, suggest me a good book and link to get a good practice in java  |
| | So it's my first time trying to do a loop and I've come across something that I'm not experienced enough to explain... My program compiles fine, but after I enter my third number (variable "a", see code below) it just skips a line and does nothing. It just lets me … |
| | Hi, I need to build a rating system for a travel community . It will contain user preferences such as say average time of the aircraft,aircraft age,legroom,number of stops, route quality. These might be modelled as checkboxes on my web page. The user can then select which all criterias he …  |
| | HI, I have a spec for a golf tournament report. in it it says that to generate a report for less than 200 players the processing time of the report should be within 15 minutes. how can i test this in junt the uril for the SRS is below (section … |
| | Hi Does nayone know how to test a test suite in cmd line? (in java) thanks |
 | I believe the title of my thread explains what I am trying to do... I have a .class file, I need to look at the code has generated the .class. is this possible, and if yes, can you tell me how?  |
 | Hey How do I correctly validate that a email is in the correct format? I tried using the Apache Commons Validator library but, since Im using a web service, it seems not to want to fix it up and use it. I comply the code, make the aar, put it … |
 | I have an array of objects but when i traverse throught it to display its contents, it gives an error, but only if it is not full. Any suggestions? Below is the code snippet: for (int k = 0; k < array.length; k++) { msg += String.format(array[k].toString()); } JOptionPane.showMessageDialog(null, msg); |
| | I am trying to find the point of intersection of a circle and a line through its center. I want to put an arrow on the point actually, to make a directed graph. After some calculations, I found that the math that would go in is,  The figure … |
| | I am a recent immigrant from c++ to Java. I have this problem: I have an array of objects (not yet initialized using the new operator), that I need to pass to a member function of another class for storage. In c++ I would have made a pointer to the … |
| | Hey, i was wondering whether anyone ever came accross developing something that would allow to have a software installed on the vm. What i mean by that is that i would want to install ie (internet explorer)/or any other windows application whithin my java app. so it could be opened … |
| | Hi all, I have a java program when I compile it, it compiles fine, without any error or warning. However, when I run it, I get the following warnings. [code] bash-2.03$ javac CountSessions.java bash-2.03$ java CountSessions Writing data to file... Data written to file !! log4j:WARN No such property [maxFileSize] … |
| | How can i call ? i am so much confused now ? can anybody please help me ? |
| | I am going to build a desktop software with client-server facility.What are the things i need to do for client-server? 1.Should i make 2 different version of the software?One with database for the server and one for client without database. 2.Or should i have some options in one software inside … |
| | Pl. help in handling button events in JSP like calling a servlet on Button click or executing java code. |
| | hello all how can i clear the DOS screen through java program i hava search so many web site but i can't found the proper ans. thanx in advance [:)] |
| | The Application should be able to add an entry , view an entry and delete and entry.. All other functions are working properly but my applica tion cannot delete.. Please assit where i shuld place my delete method import com.jjpeople.addressbook.action.actionresult.ShowAddressActionResult; import com.jjpeople.addressbook.actionargument.ShowAddressActionArgument; import com.jjpeople.addressbook.actionargument.DeleteAddressActionArgument; import com.jjpeople.addressbook.businessdelegate.AddressBookDelegate; import com.jjpeople.addressbook.businessdelegate.AddressBookDelegateException; import com.jjpeople.addressbook.businessdelegate.AddressBookDelegateImpl; … |
| | What I'm doing is making a game and I need to do this for my items: - Have an "Item" Class - Have other superclasses such as:Weapon,Armor,Food - Read XML file with items on it. - Create appropriate Item classes with the correct extended class. - Fill the fields with … |
| | Hi everyone, I'm trying to write a basic program to find the root of an equation. I just tried compiling it for the first time and I get the following error: RootFinder.java:6: <identifier> expected public static double searchValue(double x0, x1, a) { ^ RootFinder.java:6: <identifier> expected public static double searchValue(double … |
| | hi all , I know how to develop Mvc architectur application , Now I paln to learn frameworks, which one will be best choice structs or spring? , should I learn both ? |
| | When "ENTER" button in value class clicked the show class wil be run. but nothing happend import java.applet.*; import java.awt.*; import java.awt.event.*; import javax.swing.*; /*<applet code ="value" width=200 height=200> </applet>*/ public class value extends Applet { private JLabel lab1; private JButton btn1; public void init () { // Construct the … |
| | Hi coders, I create a BSTree but i don't know if it is right. I only want to create a bstree with Strings, nothing else. my code: import java.util.Scanner; class Node { private Node left; private String number; private Node right; public Node() { left = null; number = "0"; … |
 | I am facing some problems in a project regarding to byte fetching from a file and storing. Problem in java bytes is they are number, instead of char. In file i have seen a byte is like a char... Also how to make bytes unsigned , because signed bytes creates … |
| | i created a jsp page and put a javascript code " window.onload=func(); " in the header when the page is loading.In that func(),i set two objects to the session (using AJAX) and get them back into the jsp.After debugging the aplication everything is ok.but jsp page doesn't display the content … |
| | Hi all, I am giving the href to give a link to a file. The problem is that in IE it opens the text files in the same browser, but in mozilla it works fine(gives prompt of save as option). I want the same functionality for IE also, searching Google … |
| | Hey all, I have a JApplet that runs in browser and I can't get it to create a new JFrame popup when a button is clicked. It works fine in my IDE (Eclipse) but not when I upload it. Here's the code for the JFrame I'm trying to create: import … |
| | Hi everyone, I have been active on this forum, but I changed jobs and cannot receive my new password because I cannot get to my old email address, so I made a new account. It seems DaniWeb has been standing still the last year. There are new frameworks for web … |
 | I'm looking for a java tutorial site that will teach java and also give some exercises. Any other sites would be helpful too. |
| | The application should have one method that populates the multidimensional array with data and another method that shows the contents of the multi dimensional array. Both methods should be triggered from the main method. Assist because am been notified that the code below is not correct public class ArrayExample { … |
| | Hi all, How to display search results from MYSQL database in JSP page?? is it possibile to create gridview in jsp page? please help |
| | public class ForLoop { public static void main(String[] args) { String writtenStuff = "Hello i am bucky bucky"; int otherNum = 0; int length = writtenStuff.length(); int i; for (i = 0; i < length; i++){ if (writtenStuff.charAt(i) == 'b') continue; } }//end method }//end class Here is my code, … |
| | Hi ive been given some question as part of a homework assignment, just to clarify i dont want the answers to the questions just advice as to where to look for resources. The Socket programming model and how that model works in Java, explaining clearly how Sockets support a simple … |
| | I havent done java in a while and not sure what to do with the void methods please can someone help me out thanks whole thing is in a zip file as well done in bluej as there is a long list of code here. /** * class Player * … |
| | public static void main(String[] args) { String searchMe = "Look for a substring in me"; String substring = "sub"; boolean foundIt = false; int max = searchMe.length() - substring.length(); test: for (int i = 0; i <= max; i++) { int n = substring.length() int j = i; int k …  |
| | Ffirst of all, i have just achieved to code a program that counts the chosen letters. ( For example, i wanted it to count how many 'p's exist in the string. ) Now, for example i want to code a console application that extracts only the ones that are not … |
| | public class ForLoop { public static void main(String[] args){ String writtenStuff = "someone was here!" + "here i am!"; int numP = 0; int length = yazi.length(); for (int i = 0; i < length; i++){ if (yazi.charAt(i) != 's') continue; ++numP; }//for end System.out.println("the total number of the letters … |
| | This program is one part of the GUI part for my reminder program. I would like to update the JTable which shows all the task and will refresh every 2 second. I have questions... (1)the SwingWorker never executes( I put println in the code but it shows nothing ) How … |
| | the assignment to create 4 classes to make message server i made the code but i have an errors |
| | Hi, I am running Java 1.6.0_31 on my machine and would like to have "Nimbus" set as the default look-and-feel for my Java applications. I have followed the instructions obtained from the Oracle java website i.e. by creating a text file named **swing.properties** with the following line of code **swing.defaultlaf=com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel** … |
 | I get this error. /*array dimension missing new ImageIcon [] = getClass().getResource(name[0]),*/ ^ and I dunno what's missing. and not sure if anything else is wrong because for now there are 4 erros for name[0],name[1],name[3],name[4] import java.awt.*; import java.awt.event.*; import javax.swing.*; import java.awt.Container; import java.io.IOException; import java.io.*; import java.awt.BorderLayout; import … |
| | I was trying to use java's native Properties class to edit my ".properties" file and save them, but then I was put off by the fact that in order to do that I had to "store" the properties file by re-writing it back to disk, which simply erased all other … |
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