36,051 Topics
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| | Hi, does anybody know how to apply the fast-Fourier transform on spectrum analysis? When the application play the sound, it got the frequency wave shown, while if there are no sound, the frequency wave will not be shown. Does anybody have any idea on it? I try to search info … |
| | hello guyz,,do you know any best sites that could help me making codes in "shopping cart"??hope you can help me.thank you ahead... |
| | This coincides with my Operating System's Project and am on an unforgiving time limit. Its such a big project and theres soo many parts to it and I can't really write down the details....theres too many things to this. But if any1 knows anything about operating systems and what a … |
| | if i have an array initialized to hold 500 objects : [code]Object array[] = new Object[500][/code] but i only populated certain number of objects in the array... ex: 300 of them array.length will give me 500... how do i get the number of the used array? (it would be 300 … |
| | I am trying to make a frame with a label and a button and cannot get it to work. Im not sure what im doing wrong. [code]import java.awt.*; import java.awt.event.*; import java.io.*; import java.lang.*; public class Program3 extends Frame implements ActionListener, WindowListener { private static final long serialVersionUID = 1L; … |
| | can any guide me how to use jtapi haow can us handle an incoming call use jtapi  |
| | Hi I'd like to use an array to store values of particular things. I would like names to correspond to each value in the array. What I was thinking was, should I perhaps create 2 arrays: String[] and int[]. Then, when I call data from say example_int[1] I call the …  |
| | Is there a way of changing the username and password used to connect to the db in a connection pool, or do i have to create a new connection pool with the new username and password. I do not want to hard code the connection string thats why i want … |
| | My head is telling me that the answer to this question is going to be NO, but hopefully i m wrong. I have a servlet which gets redirected using RequestDispatcher to a jsp page, the jsp page has some html input fields. In the servlet i get the values from … |
| | Hi. The program I am writing is for a mac and am doing so in Java. I am writing a program that finds Identical files or very similar files, not necessarily identical but very Similar. Now I can thus far compare files by name but some files are identical but …  |
| | i am building a web chat application for mobiles. Registration form for new users currently includes username , password , re-enter password and a submit button to send all to a form bean. i am having problem to create a link or a button to send the input of 'username' … |
| | well friends i am new to jsp please suggest me appropiate links to start with... all suggest the way to configure tomcat to run properly.......... |
| | i need help with JTable, i want to use it to view the informations from my database but i dont know how to do that. would apprecitae help from anyone. |
| | Hi Cud anybody help me in sorting out this issue???...i have written a java code which fetches a text fils as an input & displays the output. Now i want to display the output in an existing Excel file in a desired format. import java.io.*; class hi { public static … |
| | I am a student who is taking a computer science course in college and have been assigned to write an algorithm for a java program. I have no previous programming experience and I am really behind in this class. It seems fairly simple and anyone on here could probably do … |
| | I want to understand the JDBC thoroughly (i.e. all 4 types of drivers). Any body can help me in the following. I have searched for the resources to clear this for the past 6 months. But I can't able to clear these. 1. Difference between the 4 types of drivers. … |
| | I need to print the following array and am not sure how to do so. It uses an object which is already created named TimeAT.... i mport java.util.Scanner; import java.util.Random; /* * To change this template, choose Tools | Templates * and open the template in the editor. */ /** …  |
| | hi, as far as I know if i wanna read external text document, i can either do: [code] BufferedReader reader = new BufferedReader(new FileReader("xxx.txt")); or Scanner reader = new Scanner(new File("xxx.txt")); [/code] my first question is, what is the difference between BufferedReader and Scanner? And what is the difference between … |
| | Hi again What is the name of the component in programs where there is: a 2 character text field and on the side there are up and down arrows to increase or decrease the value in the text field. There is usually one in the "Print" dialog in MSWord, with … |
| | I don't think this qualifies as cheating on homework. I am making a Java applet that will input the name of a teacher at our school and output their schedule. When I say schedule, I mean the times they teach and what classes they teach, and where they teach them. … |
| | can anyone tell a program to calculate d number of objects in a program?  |
| | hi guys,, can anyone post the entire coding for A* algoritham using heuristic functions..u hav to use java langauge.. |
| | hello guyz,,do you know best sites to recommend on : tutorials about reading a file ("text file") and writing it in "java file?? in short reading or writing files in bufferedreader.. thank you ahead guyzz.. |
| | I'm new to java and we have to create a program telling the user how much of their income will be taxed based on rates given out by the government of Canada. I am getting 2 errors, one saying that "variable federal might not have been initialized" and the other … |
| | I have a generic static inner class inside a generic non-static class. It gives me errors because E cannot be accessed from a static context: [CODE] public class List<E>{ public static class InnerClass<E>{ } [/CODE] How do I fix this? Thanks! |
| | I am writing a code to read in a mips file to look for data dependencys, but when i read the file in i get all kinds of goofy stuff coming in as well, thanks in advance for any help. [code=java] import java.io.*; import java.util.*; public class hw { static … |
| | What dose it means at Dice.rollDice(Dice.java:30) java.lang.IllegalArgumentException: n must be positive at java.util.Random.nextInt(Random.java:250) at Dice.rollDice(Dice.java:30) my code is : [code=jva] import java.util.Random; public class Dice { // instance variables. private Random mRandom; private int mSides; /** * Constructor for objects of class Dice */ public Dice(int sides) { sides = … |
| | How would you make it so that you check if the user has pressed the keys up, down, w or s every half a second |
| | I'm not sure where I'm going wrong in this program. I needed to create two different classes, one being the driver class the other the utility class. The purpose is to ask the user for the circle's radius, creating a Circle object, and then reporting the circle's area, diameter, and … |
| | Hello. I am new at this and I'm having trouble getting a total from multiple data. What i need is a total for a final summary. How do i calculate this? i have searched and read many text on this subject, but have had no luck... some how i get … |
| | I created menu for mobile phone, where after you make move screen should be repainted and after that a sound should be played. However at present stage sound is played first and just after that Canvas view is repainted. Bellow is skeleton of the class [code=Java] public class ContactMenu extends … |
| | This is the main of my program all errors have been solved now I need help sorting my array list with a selection, bubble and insertion sort to print out in alphabetic order using the name as key numeric order using the income as key order of nationality in alphabetic … |
 | hi i am beginner i am using j2sdkee1.2.1 and jdk1.3 for deploy my servlets. what is cloudscape in it? how i can use cloudscape for my servlets ? can i dynamically create my database table in servlets? |
| | I would like to know witch one is better Jboss or tomcat ? |
| | Dear Friends, Here i am giving my programme coding and error. file name - MyCanvas.javaimport java.awt.*; import java.applet.*; public class MyCanvas extends Applet { public MyCanvas() { setSize(80, 40); } public void paint(Graphics g) { g.drawRect(0, 0, 90, 50); g.drawString("A Canvas", 15,15); } } When i use command javac MyCanvas.java … |
| | I'm trying to get a GUI application to display an image. So far I've got this bit of code: [CODE=java] import javax.swing.*; import java.awt.*; public class DemoImage extends JFrame { public void showImage() { // creates the actual frame with title 'My GUI' and dimensions JFrame frame = new JFrame("My … |
| | Hi everyone, I want to retrieve data from database in jsp page based on the particular m_emp_no .I am finding it very difficult so please can you all help me out with the problem. Here is the structure of my database and i am using ms.access [ICODE]m_emp_no m_leavetype m_bal 1004 … |
| | Hi guys, I'm not really sure how to ask this or what to even search for. I want to write a Java program that can feed data into another program. If the other program had command line parameters then I'd know what to do, but suppose the program I want … |
| | The example code below produces two radio buttons, side by side, i.e. [B]O[/B] Keywords [B]O[/B] All Fields Without specifying a width for the selectOneRadio component (which I don't think is the best solution because of user controllable font sizes, etc), "All Fields" wraps across two lines to become: [B]O[/B] All … |
| | Hi, I'm wondering how I can accomplish this. Suppose I have the following array [CODE]String[] randomText = {"hi", "hello", "hey there"}[/CODE]; If I want to print the array I only know how to do so line by line. [CODE]for (int num = 0; num < randomText.length; num++){ System.out.println(randomText[num]); }[/CODE] Can … |
| | hello guyz,,do you know best sites to recommend that has a tutorials on "swing" about: a.) sample writing a file on "text file" b.) the saved text file will be read by the main class in JOptionPane (java file) actually, i has on it on bufferedreader,,but i really like to … |
| | i hav a project on mind and the proj is to be able to control my laptop from my mobile,controls like shutting the laptop down.i'v gotten d phone simulator and i code with netbeans.i hav an ok knowledge in j2se,i believe it is possible if yes what next? |
| | hi all new to tomcat.. i installed tomcat on c:/tomcat 5.0.28 and c:\j2sdk1.4.1_07. i run my hello world servlet ,did all stuff making diretories,web.xml for running a servlet .it execute on my system. i search for this in google,but i don't understand !!!! but if my servlets are using or …  |
| | Hi. My PC has WinXP SP2 and I have a problem with webpages not displaying properly in IE6. It seems that any site with the ending .aspx won't load at all, i just get a blank page with no error messages or anything to tell me what the problem is. … |
| | Hi, I need some help with an assignment due in a few days. It asks me to draw a table using four functions, as well as a main function. The main program should call a char function LProp (3 variables), that calculates the truth-value of the logic expression for a … |
 | I typically don't post anything unless I have a question or comment... but I am still trying to understand Serialization for Network-Applications and I ran into a brick wall (repeatedly) during a project that required sending and receiving chunks of data from one Client to another. Be aware of using … |
| | I am mostly done working on the homework assignment for my class, it requires that I complete an employee directory system that takes a user input value and compare it to 3 values employeeName, employeeID, and phoneNumber. The system must work in such a way that if the search is … |
| | consider my input file has the following data date type of transaction amount 1 w 100 2 d 230 3 d 550 4 w 430 5 d 1100 6 d 400 so i need to sort the amount in ascending order.So when i sort the amount,the corresponding date and transaction … |
| | Hi, I'm having a small problem. After installed a routine system update, which included the newest Java update (though I'm on 10.4.11) I have lost access to my localhost! I thought it was a problem with my server, so I installed another server using MAMP, and through MAMP I can … |
| | Logic circuit builder is a software that simulates AND,OR,XOR gates.I want to give it an attractive GUI wherein gates can be dragged/dropped.How do i accomplish drag and drop in Java?For instance if there is a buuton with an AND gate.if the user clicks on it and drags the mouse pointer … |
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