36,051 Topics
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| | I have created one Jframe mainframe which size is fit to monitor size. I have created another frame called subframe which size is 300,300 . My problem is when i open the subframe from the mainframe iam not suppose to use mainframe without close the current frame . How can … |
 | Hello Everyone, Im needing a bit of help here. First, Im trying to let client download a file from server and save it on client's pc. When client clicks on button "DOWNLOAD", it will call a servlet that will download the file. Expected outcome is that a SAVE AS DIALOG … |
| | First of all, i have a program where when i click a button an item is added to a list and at the same time i'm trying to get a double to display elsewhere. I am just in a funk right now and cannot think properly. what is good. when … |
| | my code plays a midi java sound file , but i want to play it in a loop constantly ! can somebody help me please ! [code]import javax.sound.midi.*; import java.io.IOException; import java.io.InputStream; import java.io.FileInputStream; import java.io.FileNotFoundException; public class MidiPlayer{ public static void main(String[] args) { try { Sequencer sequencer = … |
| | I am trying to output every single possible combination of a string. So if the string was "abc" it should output a b c ab ab ba bc ca cb acb bac bca cab cba Is there any method that would help me do this? :) |
 | I want to dump or backup a mysql database on button click, i have the following logic, no errors bt it cant execute, can anyone help me in identifying the error. the code as follows: [CODE] try { String dbName = "xxx"; String dbUser = "root"; String dbPass = ""; … |
 | I am tying to use Gridbag layout, but I cannot seem to get it working. [URL="http://img703.imageshack.us/img703/1461/photo00002y.jpg"]here[/URL] is the plan. and here is the code: [CODE] import java.awt.event.*; import java.awt.*; import javax.swing.*; import java.net.*; import java.nio.*; public class Chatroom implements ActionListener { public Chatroom (){ JFrame frame = new JFrame ("Warrior … |
| | Hey guys, i'm new to the Java and have stumbled on a few things. When a button is clicked on my program an string is printed to a JList model. Ex. Snickers Bar ............$1.00 Now what i am trying to do is keep a running total of all these items …  |
| | So im doing this swing java gui project where the admin can login and search, modify and add users to the database mysql. Im having trouble putting in the right getParameter to get: type = radio group button of 2 with 1 as Doctor and 1 as Nurse Specialty = … |
| | Hello Members, Is there any Permutation API in Java? I found the following: [url]http://www.jsc.nildram.co.uk/api/jsc/combinatorics/Permutations.html[/url] I am unable to figure out what should be the import statement for the above API. I would be grateful for any help. Thank you! sciprog1 |
| | Hi, I would rather search on google, but I have a little time, so I need to do this very quickly. Can anybody tell me how to step-by-step configure web work java framework. I downloaded version 2.2.7? What should I do to use it on my computer? I have installed … |
| | Running Win 7 Ultimate 64 bit 9GB mem, two RAID 0 500GB drives - Dell Studio XPS Desktop. Trying to update Java (jre-6u25-windows-x64.exe). Tried everything found on this site and others. Keep getting Error 1714 which Oracle said they have no info for. Suggestions? Tried installing several older versions but …  |
| | I have a general idea on how to start. I would need a gui with a screen to display the text and a JTextField to write the text and a send button. I would also need to import the java.new package to connect between the computers, but other then that …  |
| | Could I enquire, how do I check for the time complexity for the program below? (: Thank you! [code] import javax.swing.*; import java.awt.*; import java.math.*; /** * * @author Jia */ public class tilePanel extends JPanel { int numSquares; int increment; private frame app; Integer buff; String x=" "; public …  |
| | Hi, I am writing a simple script, basicly i have: [CODE] String s = "A quick fox jumps over a lazy dog"; [/CODE] Now i want to print it like this: (like 3 words per line) :: A quick fox jumps over a lazy dog Know i know i can …  |
| | Hello Friends, I have one problem that, I am passing query string from Mobile to Server. Now problem is Spaces and some symbols are not allowed in URL. So,I encoded somehow before sending it. Now the problem, how to decode(I know to decode by using URLDecoder.decode(Request.getQueryString)) and retrieve the values? … |
| | Hello friends . I have some problems . I want to Implement a stack and use 2 jButoons for push and pop and a jlist for showing the pushed elements . I write this code but it dont give me good result ...! please help me compelet this program . …  |
| | This is my first time writing an array of objects and I’m having an issue putting it all together. I have written two classes and the third program that is supposed to test the classes. ***PROBLEM*** My primary issue at the moment is that my program to test the classes …  |
 | I'm not sure if it's the way I'm sorting this ArrayList or the way I'm constructing new Term objects. Can anyone tell me what's wrong? My program is too long, so I'll narrow it down to the parts that are giving me trouble: The declaring of the terms and new … |
| | I'm creating a calculator, and I'm required to have a feature of key press. Ex: I have a GUI with each numerical value (0 - 9) has a button. Now when the user press 7 on the keyboard, I need buttonSevenActionPerformed to be invoked. The signature of buttonSevenActionPerformed is: private … |
| | Hi! I'm looking to be able to add a user created extension to a program I'm making. The extension should be able to execute on it's on accord, then pass control back to the program when it's done. So, Say I click a button (it's got a GUI on it), … |
| | Okay, so I have a rather easy problem that I can't seem to figure out. I'm getting cannot find symbol errors for T item=(T)input.next(); The program is a test file for a Binary Tree program. I was told the input 'item' has to be in T type. Obviously they have … |
| | Is it possible to write java program for controller or programmable interrupt controller? |
| | how can i solve this error.?? incompatible types found : java.lang.String required: int num=userIn.readLine(); :) |
| | Hey, my name is alexandra and i'm actually in a computer programming class right now and my final is coming up. unfortunately, i have barely slid by all year long and haven't really learned much. Our final is coming up and i am in desperate need to pass it :'(. …  |
| | Good morning to all:zzz: I am a beginner programmer in Java, and I am having an issue I don't quite understand for a program I am working on. I am hoping that someone here with some more experience than myself could take a look at my code and see what …  |
| | I'm tired, so the answer to this might be obvious but I cannot figure out what is going on. I uploaded the code plus input file. When I ran the code here's what I got: [code] What do you want to do? -1 -- quit 1 -- add object 2 … |
| | Hey all, I've been trying to solve this issue I have now sometime but haven't had much luck with it. I want to be able to update a label in a JPanel from another JPanel EG panel1 has an actionListener that updates a JLabel in panel2. I've been searching around … |
| | Hello, jsp newbie here... I'm having trouble starting off !! I'm using tomcat 5..5.31, I downloaded jakarta-taglibs-standard-1.0.6, copied the files in jakarta-taglibs-standard-1.0.6\lib to web-inf folder of my application in \webapps\ Following is the exception: type Exception report message description The server encountered an internal error () that prevented it from … |
| | Hey all:) I'm learning Java and I'm having a little trouble on a polymorphic write-to-file function. Let me quickly explain my project: I have an abstract class Mammal, with non-abstract children Horse, Cow etc. I have a Main program that creates a couple Horses and Cows, and store these in … |
| | What i'm trying to do here is just place the values in my text file into variables the txt file contains: 1111 50 2222 60 3333 70 4444 80 5555 90 i get the error :[COLOR="red"]Exception in thread "main" java.lang.NullPointerException at udptry2.m.readfiless(m.java:41) at udptry2.m.main(m.java:68)[/COLOR] [CODE] package udptry2; import java.io.BufferedReader; import … |
| | Hi, I have a project deployed on Linux machine on JBoss server and I'm executing that projet from Windows through Internet Explorer. Further more, I'm using this jsp code: <form name="upld" method="post" action="UpldFile" enctype="multipart/form-data" > <input type="file" name="file"> <input type="submit" value="Submit"> </form> to have a file chooser dialog which I … |
| | I am suppose to write a [I]ComparePlayers[/I] class that implements the [I]Comparator<Player>[/I] interface. It should compare players by number of games played (and then by alphabetical order of surname if the number of games played is the same). This is what I wrote , it is the general idea i … |
| | I need to create java class which has 2 methods: [CODE] public class IPTPLogin extends IPTPCommand { /** The email address */ private String login; /** The password of email */ private String passcode; /** Creates a new instance of IPTPLogin */ public IPTPLogin(String log, pass) { setLogin(log, pass); } … |
| | i have this code for palindrome [CODE] import java.util.*; public class CheckPalindrome{ public static void main(String[]args){ Scanner input=new Scanner(System.in); System.out.print("Enter String: "); String st=input.next(); String str[]=st.split(""); String reversedSt=""; for(int i=str.length-1;i>=0;i--){ reversedSt+=str[i]; } if(st.equalsIgnoreCase(reversedSt)){ System.out.println("String is palindrome"); } else{ System.out.println("String is not palindrome"); } } }[/CODE] i need the same programme … |
| | Exception in thread "AWT-EventQueue-0" javax.persistence.PersistenceException: No Persistence provider for EntityManager named asset_monitoring_systemPU: Provider named oracle.toplink.essentials.PersistenceProvider threw unexpected exception at create EntityManagerFactory: oracle.toplink.essentials.exceptions.PersistenceUnitLoadingException Local Exception Stack: Exception [TOPLINK-30005] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.PersistenceUnitLoadingException Exception Description: An exception was thrown while searching for persistence archives with ClassLoader: sun.misc.Launcher$AppClassLoader@11b86e7 … |
| | hii, i was intresting in doing project on sending messages to bluetooth devices with in my wifi range.... is it possible to send messages to the avialable device..??? |
| | Hi everyone! I'm creating a class for a mortgage payment. I pretty much have most of the code finished but when I compile the code I receive multiple errors saying "Cannot find symbol". This error occurs about 9 times and I am also having some problems with the compareTo method. … |
| | i need to create a class named MyShape(which i did ), and make it a super class. its instance variables should be the x1 x2 y1 y2 values shared by all subclasses. the class needs to include 1. a no argument constructor 2. constructor that takes the argument necessary to … |
| | I need a strong response to my question. I can write and compile a java application. The computer won't run the applications when the proper java command is used in command prompt. I did load the Java run time environment. The applet will load using an html tag. Whats happening … |
| | hi im doing a project in java and i would to know how do u create a restuarant bill calculator in java |
| | This is the server code for the udp server/client program . There are no errors except when you run the program the ff error occurs: [COLOR="Red"]Exception in thread "main" java.lang.NullPointerException at udptry2.UDPServerbackup2.main(UDPServerbackup2.java:44) Java Result: 1[/COLOR] the client side works how it should just this part of the program [CODE] package … |
| | Hi guys, Im trying to do battleships game. But I dont know, what is the best way to create interactive battlefield? I created JFrame and put inside two JPanels (my and opponents field).I wanted to put inside JButtons (JFrame had GridLayout), but I was told this isnt right solution. It … |
| | I need help creating a Binary file that displays in Hex and readable text! I have already completed the gui part I need help converting to Binary. Here is what is required: 16 Byte values displayed as 2 digit hex values separated by 2 spaces, then a separator | and … |
| | Hi , I am not able to execute the below makefile. [CODE] JFLAGS = -g JC = javac .SUFFIXES: .java .class .java.class: $(JC) $(JFLAGS) $*.java CLASSES = .\minimax.java default: classes classes: $(CLASSES:.java=.class) clean: $(RM) *.class [/CODE] I am getting this error make: Fatal error in reader: makefile, line 6: Unexpected … |
 | 1. The InputMismatchException. Write a program that prompts the user to read an integer and displays whether the number is even or odd. If you enter an invalid integer (for example, 2.5 is not a valid integer) your program should say so. Note, you will need the following import statement: … |
| | I have a class that contains two arraylists- student names and Ids I want to put them into LinkedHashSet( so, I can sort, delete, add and edit e student profile); I created a class called Student that contains setName getName setId getId and toString methods. now, I try to do … |
| | hi there guys :) im currently working on a project with jquery... the thing is.. i need to change the contents of a div named "sub2" with the contents of "pets.html"... i've read some tutorials and i thought the best way to do this is through the use of jquery... …  |
| | Hello, My web-page is not loading correctly in some of older version of browsers. Here is my website [URL="http://128.196.27.167:8080/"]mis510proj[/URL]. Any help would be appreciated :) I attached my naive code below :) [CODE] <!-- Page (2 columns) --> <div id="page" class="box"> <div id="page-in" class="box"> <!-- Content --> <div id="content"> <div … |
| | I'm am reasonably new at coding and am currently studying it at College. While in my break I found Project Euler a neat little site with problems which I have been working through for an extra challenge. This is the question that I am stuck on: [url]http://projecteuler.net/index.php?section=problems&id=8[/url] basically you are … |
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