35,618 Topics
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 | Good time of day! I'm working on creating an Eulers Method Calculator program. The problem I got stuck on is I don't know how to convert the user's string into a Differential Equation (dy/dx). This is what I have so far: import static java.lang.System.*; import java.util.Scanner; class EulersMethod { public … |
| | I am using the C code with java code in JNI framework (Netbeans).I am getting the following error: Exception in thread "AWT-EventQueue-0" java.lang.UnsatisfiedLinkError: C:\Developers\DLL_Key\MainDLL.dll: %1 is not a valid Win32 application Is there something wrong with my c compiling tools? I am using mingw-builds\x32-4.8.1-posix-dwarf-rev5 |
 | I am a computer science graduate and want to learn web application development. I have learned HTML,CSS and JavaScript. I have knowledge of Oracle and medium knowledge of C++. Now I want to learn a server side scripting language. I am really confused what language should I learn. Personally I …  |
| | Heya all, Right now, i'm working on a small, text-based game, but i'm a bit confused about how to get my coupeling right. at the moment, i have 5 classes: an Item class, an inventory, a player, a room and a 'game' class that loads the game. The game class … |
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| | I`m making a GUI for my java program using Swing Components and Netbeans IDE. My problem is that when loading a frame from another frame then newly loaded frame shows the contents of the old frame when moving mouse over the new frame.Please help me o avoid this.Am using drag …  |
| | Hi, I am a novice in .Net. Can anyone please help me by clarifying the below doubts... :cool: How can we include a client side script like Javascript or VBscript in an ASP.Net page? Can we have multiple <script> blocks in ASP.Net page? |
| | Hello All, I would like learn Java from basics as I am not from IT Domain. Its a new platform me but I have some great oppurtunity if I will learn Java. Please let me know the best way to learn Java for Non-IT Domain. Please note that I have …  |
| | Task: Write a program that calculates the mileage and/or cost of fuel by asking the user to input two cities. It only works for two places and not all three, why? How can I put just the name of the location instead of inputting the numbers? package Winterproject; import java.lang.Math; …  |
| | Hello all, I am stuck with a nullpointerException at line 41 and 60.Can someone please help me out.any kind of help will be appreciated. Thanks import javax.swing.*; import javax.swing.event.*; import java.awt.Color; import java.awt.*; class calenders extends JFrame { int i=0; int j=0; int k=0; JFrame jf; FlowLayout fl; JPanel jp[]; … |
| | Hi all. Im having trouble getting my menu to work on my window. this is what I have so far as for my code. package sparepartinventory; import java.awt.Dimension; import java.awt.Toolkit; import javax.swing.*; /** * * @author jonathan */ public class SparePartInventory { /** * @param args the command line arguments … |
 | Hello all, I am trying to find all occurences of a letter in a word. If the letter is present in the word, then I save it to a String. For example here is the text: Hello World, my name is godzab. I search the text, and if there is … |
 | Please help me with this, i'm trying to create a domino game (which a project in school) i'm a midway learner of Java Prog, but still i haven't know a lot. My problem is, i'm trying to draw over the background image of my playFrame, but the rectangle does not … |
| | i started learing java reading thinking in java i cam across this java objects do not have same lifetime as primitives an object retains in memory even after its scope until garbage collector detects and releases the memory well whats the lifetime of primitives..?? their memory will be released after … |
 | Ok, so I'm working on a web-project, I connected a custom hanlder to the root Logger in `contextInitialized()` of a ServletContextListener: @Override public void contextInitialized(ServletContextEvent sce) { Logger def = Logger.getLogger(""); Handler hand = new DatabaseLoggingHandler(); hand.setLevel(Level.WARNING); def.addHandler(hand); } which looks like: import java.io.PrintWriter; import java.io.StringWriter; import java.util.logging.LogRecord; import java.util.logging.Logger; … |
| | /* PointOne type objects has three members. Two of type Integer and one of type ThreeD a custom class. PointOneClone method takes an argument of PointOne type and copy every value from his members to arguments members. So the result is a PointOne instance with the exact same values but … |
 | Hello everyone, I just start to study about Java and I need to design a website in Java. I do not know I should create a Java Application project or Java Web or Java EE.... Could you help me to start this? Thank you.  |
| | hi geys , I need ow to return a array string to my method public String[] SearchPort(){ ArrayList<String> arr=new ArrayList<>(); Win32Driver w32Driver= new Win32Driver(); w32Driver.initialize(); port= CommPortIdentifier.getPortIdentifiers(); while(port.hasMoreElements()){ cuport=(CommPortIdentifier) port.nextElement(); if(cuport.getPortType()==CommPortIdentifier.PORT_SERIAL){ // return cuport.getName(); arr.add(cuport.getName()); String[] t=new String[arr.size()]; t=arr.toArray(t); for(String j:t){ return t; } } //System.out.println(cuport.getName()); } String h[]={"noo data … |
 | I have good knowledge of C, and a good knowledge of core Java. Please list out the areas I need to cover for J2EE. There are many technology available in j2ee.. Please tel me which technology is using uptodate.. I have premium account in lynda, vtc, and pluralaight.. There many … |
 | Good day folks. Problem: My program needs to import data from a database and display them in a table then manipulate and display the data in various ways. That bit is solved the next part is where I need help. The program then needs to save locally... 1. the newly … |
| | Hey everyone, Can we create a java file that runs without the JVM? I have googled the topic and found out about excelsior Jet that is meant to convert the java code into native one so that it won't require a JVM. Is it true and should I download the … |
 | I know that this is probably the stupidest question that I have ever asked but here goes....... I am trying to create a new application in netbeans..... and having no luck at all. First I create a new project called Interactive Campaign Manager by choosing java category and then Java … |
| | I need some help to make AES work with UDP. I keep getting this error. Exception in thread "main" javax.crypto.IllegalBlockSizeException: Input length must be multiple of 16 when decrypting with padded cipher at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:750) at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:676) at com.sun.crypto.provider.AESCipher.engineDoFinal(AESCipher.java:313) at javax.crypto.Cipher.doFinal(Cipher.java:2087) at AES.decrypt(AES.java:31) at EchoServer.main(EchoServer.java:26) It seems that upon receiving the … |
| | Write a general purpose currency convertor program. The program is started by giving it three program arguments: the name of the currency the user holds and wishes to sell, the name of the currency the user wishes to buy, and the conversion rate from the first currency to the other. … |
| | Hi, I want to build an application in java, without using ipAddress i should be able to access the Remote System. Please do the needful. |
| | How do I set the security permissions to no restrictions with a .policy file when I start the application. I can trying to run it with HTML. Thank you! |
| | Hello, I'm writing a plugin for a software in eclipse. I'm using vtd-xml.jar for importing an xml file. I have added to the build path by rigt clicking on the paroject and selecting the opetion add to build path. While I do the operations from eclipse it is working fine … |
 | import java.io.*; import java.net.*; import java.util.*; public class UselessHTTPServer04 { public static void main(String args[]) throws Exception { int port = Integer.parseInt(args[0]); ServerSocket serverSock=new ServerSocket(port); while(true) { Socket conn = serverSock.accept(); Scanner scanin = new Scanner(conn.getInputStream()); String line=null; int nlines=0; while (true) { line = scanin.nextLine(); if(line.length()==0) break; nlines = … |
| | Hi dear all i am new in java i don't know how identify the background and foreground color of image if any have idea please help thanks in advance |
| | Hello Guys , I am having an error message with javafx scene builder integration on netbeans kindly help me !  Thanks |
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