32,199 Topics
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 | Hi. I am trying to browse a file and use the path variable in my File code. Both the things are in same class. The problem is that I am getting NullPointerException. Please check if I am doing it correctly Here the code snippet I am declaring [CODE]public class MyClass … |
| | how to print a resultset in a jtable.. I have retreived the data set and I want it to desplay in a table as it is in the database. How can i achieve it? thnakx. |
| | so I'm using code from [url]http://schmidt.devlib.org/java/file-download.html[/url] in the hopes of inputting a URL and getting the file that URL points to. It works, sometimes. 90% of the time it doesn't work. Also, it seems a lot of the pages I want to download do not end in html, although I'm … |
| | Could anyone tell me what is wrong this code please. I'm trying to do this. Add a static method Account consolidate(Account acct1, Account acct2) to your Account class that creates a new account whose balance is the sum of the balances in acct1 and acct2 and closes acct1 and acct2. … |
| | I'm trying to do some consolidation but I'm not sure on the specific rules of consolidation so I'm having A LOT of difficulty on it. Here's what I'm trying to do. Write a program that prompts for and reads in three names and creates an account with an initial balance … |
| | What is wrong with my code? [code] String[] movieString = {"movie1", "movie2", "movie3", "movie4"}; JComboBox movieList = new JComboBox(movieString); movieList.addActionListener( new ActionListener(){ public void actionPerformed(ActionEvent e) { JComboBox a = (JComboBox) e.getSource(); //String movies = (String)a.getSelectedItem(); if (e.isSelected()); return subpanel; } }); }[/code] |
| | I am making this program that will take a positive integer and turn it into this Ex: Enter a positive integer: 245 2 4 5 I am wondering if I am doing this right. I know there might be some parse errors. but all I am concerned with, if is … |
| | i'm as new to java as you could ever be. how would i make a table that outputs the sides of a triangle, the perimeter, the angles, and the area? |
| | How do I reinitialize array to null or zero when reprompted to renter data. Tried this but still computes average for previous entry. Student[] students1 = new Student[studentCount]; here is a snippet of code [CODE]float totalscore = 0.0f; boolean isValid = false; String lastName = ""; String firstName = ""; … |
| | basically i have created a program which reads integers from a txt file and works out the averages etc. now the below code i wrote to simply state which month has the highest or lowest rainfall. below i have created the code but on compiling says there an error....can someone …  |
| | I am trying to get two numbers to overflow and print an error message stating this. it works for some numbers, but other numbers for example adding the numbers 1073741824 and 1073741825 results in a negative number -2147483647 which is clearly overflow. However, I cannot get these negative numbers to … |
| | hey, in my code i'm using Runtime.getRuntime().exec() in order to run a .bat file that calls another java program (they communicate with each other using RMI). when i call: Process process = Runtime.getRuntime().exec("cmd /c start C:\\MyFolder\\JavaApp.bat"); the seperate process runs perfectly, but when i add a space to the path: … |
 | Hey, can anyone tell me what's wrong with this method? I keep getting <identifier> expected error on line 1. [CODE]public static void FaultHandler (DatagramSocket aSocket, InetAddress aHost, int proxyPort, byte[] requestArray, rec_bytes) { int faultCount = 0; while ( faultCount < 4 ) { DatagramPacket request = new DatagramPacket(requestArray, requestArray.length, … |
| | Hello all. I have a problem that seems like it should be relatively simple to fix but I have been scouring the internet and can't find an answer =( I am trying to add a keylistener to this code, but it doesn't recognize the method addKeyListener(this); I am working with … |
| | 1.Uses a socket object to open a socket connection to “[url]www.google.com”[/url] on port 80. 2. Constructs a PrintWriter and a BufferedReader from the socket 3. Sends a HTTP request for the page “[url]www.google.com”[/url]. If your PrintWriter is called “out” then you could, for instance use the code: out.write("GET /~rdb/page/index.html \n"); …  |
| | [code] import java.util.*; import java.io.*; public class testing { public static void main(String[]args) { int NoOfLines=0; int i=0; String fileName = "tingtings.txt"; String line; String[] lines = new String[1000]; try { BufferedReader brStream1 = new BufferedReader(new FileReader(fileName)); while ((line = brStream1.readLine())!= null) { NoOfLines++; } while ((line = brStream1.readLine())!= null) … |
| | Hi, I recently got my SCJP last month and really need info on where I can find opportunities for a java programmer in nigeria. And would also be very grateful if anyone could advise me on the advanced technologies I should start looking at esp in terms of marketability around … |
| | hi i need help in my project which is . Create a program that creates a user interface for practicing times tables. the numbers to be multiplied should be randomly generated. the product should be randomly generated. the product should be a number less or equal to 100. |
| | hi all [COLOR="Red"]i m making chess in java and have a problem. Plz if u can help me out.[/COLOR] [B][I][I][I][U]Problem is[/U][/I][/I][/I][/B] when i add a JPanel to a JFrame it sets the size of JPanel given by me in the code. but when i add another JPanel then it automatically … |
| | im relatively new to trying to program in oop. i have been slowly working through this entire program learning as i go. i have gotten this class to compile. [CODE] /** * Write a description of class CO2Footprint here. * * @author (your name) * @version (a version number or … |
 | Putting it out there that this is a school assignment. I have nearly all of the code figured out, but the instructions make getting the output and variables to match up. If anyone can assist in seeing what the instructor intends for us to do, I would greatly appreciate it. … |
| | Hello :-)! I'd like to create application for mobile phone (maximum price of phone would be about 220USD, it is for Central Europe; I will be testing the application on Sony Ericsson k750i and maybe on Motorola V500). The application must recognize speech and properly react for recognized numbers (calculate … |
| | Hi, I ap posting my Assignment subject here, and hope to get some helps with each Classes, I am not asking that you do all my home works but to give me hints as I want to learn something and as I am new to Java I am block some … |
| | Hey everyone, I am trying to write a code which would read a file and print the number of words and sentences in each of them. I want to take everything step by step; so I am making sure that all my methods work perfectly before proceeding. In the code … |
| | I'm trying to write an instant messaging program in Java. What I have coded so far, goes like this: Each client connects to a thread created by the server, to which he/she sends the message. My doubt is, how can I kill all the threads that have been created by … |
| | I've got the following question about threads in Java: Isn't there a problem if: -There's a main program which creates a series of threads. Each thread needs to have access (and to modify) to the same object of a user defined class, and this object has references to a hashtable … |
 | i need a online exam project on java urgently.so if anyone have this plz send me urgently.also tell how to run this.:) |
| | Hi I intend over the next few months to learnt Java with the purpose of building my own simple web crawler/spider. I have seen a few open source spiders but would like to build my own if possible. What I would like to ask is how would I go about …  |
| | I am currently building a Polynomial linked list. Classes [B]Node[/B], that has a Term and a Node next. [url]http://www.boomica.com/Node.java[/url] [B]Term[/B] with a coefficient and exponent. [url]http://www.boomica.com/Term.java[/url] [B]Polynomial[/B] [url]http://www.boomica.com/Polynomial.java[/url] [CODE]public void addTerm(Term nomial) { Node temp = first; Node toAdd; if(isEmpty() || (temp.getTerm().compareTo(nomial) <= 0)) { Node newFirst = new Node(nomial, … |
| | Can anybody help me in this regards. Project Title - Inventory Management System Front End - Java. Back End - MySql. i need project guideline. even i dnt know how to work for both. |
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