36,051 Topics
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| | what are requirements for sql server 2005 installation? how to connect it with netbeans> can we make no. of instances?how and why?  |
| | I am doing a cross-site ajax to java data transaction(Not sure if I named that correctly, so please forgive me about that). Part of code in Java file: [CODE]BufferedReader input = new BufferedReader(new InputStreamReader(connectionsocket. getInputStream())); DataOutputStream output = new DataOutputStream(connectionsocket.getOutputStream()); ... output.writeChars("some random text"); output.close();[/CODE] Also I have index.php file … |
| | Hi all, Im new to java. I get this error. Non-static variable this cannot be referenced from a static context myClass c=new myClass() ^ this is my code [CODE] public class MyOwnBm{ private Hashtable myHash=new Hashtable(); public static void main(String[] args) { myClass c=new myClass(); c.match(); } public class myClass{....} …  |
| | Hello I appreciate all the help i can get on this ,i am running a javabean on my application server inside the network ,this java gets requests from the apache web server on the DMZ ,my firewall admin has rules for my users to connect using defined ports numbers ,my … |
| | Why i am getting this error ERROR at line 5: PL/SQL: SQL Statement ignored Here is my code CREATE OR REPLACE PROCEDURE SELECT_VEHICLE_VEHICLE_TYPE (vehicletype IN VARCHAR2, vname OUT VARCHAR2, vtype OUT VARCHAR2, efirstname OUT VARCHAR2) AS BEGIN SELECT v.V_NAME INTO vname,v.V_TYPE INTO vtype,e.E_FIRST_NAME INTO efirstname FROM VEHICLE_TABLE v INNER JOIN …  |
| | I'm getting error messages when I run my program. The problem is as follows: Design a Payroll class that has fields for an employee's name, ID number, hourly pay rate, and number of hours worked. Write the appropriate accessor and mutator methods and a constructor that accepts the employee's name … |
| | hi, I have a problem with my JTable it displays the same line at all lignes,my code consists to use a command that will be run in background (using the command exec.getRuntime ()), and this will return multiple rows for that, I used a variable "i" to initialize lines and … |
| | Hi, I'm having some problems with my program and I'm not sure how to fix them. I have a main method that starts out with a frame. [CODE]public class Cryptography { public static void main(String[] args) { CryptoMainMenu mainMenu = new CryptoMainMenu(); JFrame frame = new JFrame("Cryptography"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.getContentPane().add(mainMenu); frame.pack(); … |
| | Hi everybody, Tryed to make this program: Simple browser: you type the URL at the top and then get a new window with this web page. But my output is just JFrame(Even color did not get changed) help me please to find the problem. [CODE]import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; …  |
| | Hello, I'm trying to make a JPanel with JFrame capabilities, such as resizing, and moving, Everything seems to work fine, altough there are minor flickering inside the JPanel, I have numeral repaints and I have a method called update(), which uses absolute position to arrange Containers and Components. Whenever the … |
| | Hi all, Im trying to remove from a HashTable by providing key and to get by proving key. And i tried as follows for removing, Caharcter ch=p.charAt(i); but gives these errors. myOwnBm.java:60: cannot find symbol symbol : method Remove(char) location: class java.util.Hashtable myHash.Remove(p.charAt(i)); ^ myOwnBm.java:77: inconvertible types found : java.lang.Object … |
| | Hi i need to add crosshairs to my code, like draw 2 lines across the screen on a JPanel, i also need to be able to turn them on and off with a checkbox which is on a JPanel. the other panel needs to be drawable on like a paint …  |
| | Hi! I'm working on a school project and ran into a problem. We're creating an ArrayList of basketball games where each game is set up as: [CODE] public Game (String homeTeam, int htScore, String opponent, int oppScore) { this.homeTeam = homeTeam; this.htScore = htScore; this.opponent = opponent; this.oppScore = oppScore; … |
| | If we are given a data set which has student marks, GPA and Attendance, how can KNN be used to find the best 4 students? I admit, that this is a homework question, but I am not asking for the code ... I will do that myself.... I only need … |
| | hello everyone i have wrote a code but it shows [B]"org.apache.tomcat.dbcp.dbcp.SQLNestedException:"[/B] error org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot create JDBC driver of class '' for connect URL 'null' at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1150) at org.apache.tomcat.dbcp.dbcp.BasicDataSource.getConnection(BasicDataSource.java:880) at listener.MyContextListener.contextInitialized(Unknown Source) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3972) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4467) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:526) at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1041) at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:964) at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:502) at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1277) at … |
| | hello frnd i am wriing program on in which i try to connect mysql with servlet but it gives error here is my code [CODE] [B]Test.java[/B] package my; import java.io.IOException; import java.sql.Connection; import java.sql.SQLException; import javax.naming.Context; import javax.naming.InitialContext; import javax.naming.NamingException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.sql.DataSource; … |
| | my problem in here is that i want to input chairs for the barber shop, there should be input chairs button and i will input how many chairs i want, and if for example i will input 4 and press ok, the barber chairs will become 4 also , and … |
| | I have this Code... ifsDAO.java [CODE]package source; import java.sql.*; import java.sql.SQLException; import java.util.*; public class ifsDAO { private Database database; public ifsDAO(Database database) { this.database = database; } public List<ifsBean> list() throws SQLException { Connection connection = null; PreparedStatement statement = null; ResultSet resultSet = null; List<ifsBean> ifs_array = new …  |
| | Hello there I am using RAD and there is some problem with my websphere its not publishing anything here is the error ........................................................................................... [ATTACH]24189[/ATTACH] ........................................................................................... Tagged the screenshot of y problem please reply...... |
| | I have a school project and what is needed is to Write a program that prompts the instructor to enter the 10 grades of midterm 1 and store these numbers in an array. Next prompt for the 10 grades of midterm 2 and store these numbers in a different array. … |
| | hey, so I am just starting java3D, and I am running into some pretty basic problems... I started a tutorial online (from [url]www.java3d.org[/url]) and the first sample program is: [CODE]import com.sun.j3d.utils.universe.SimpleUniverse; import com.sun.j3d.utils.geometry.ColorCube; import javax.media.j3d.BranchGroup; public class Hello3d { public Hello3d() { SimpleUniverse universe = new SimpleUniverse(); BranchGroup group = … |
| | hi below code is an example.I hav couple of questions 1)The highlighted bold red code(myParrot[0]...)can it be simplifyed? 2)Can i use random to generate a given set of numbers?How? [CODE]public class Bird{ public static void main(String[] args) { int[] myParrot = new int[3]; [B][COLOR="Red"]myParrot[0]=1; myParrot[1]=2; myParrot[2]=3;[/COLOR][/B] for (int feature=0; i<myParrot.length; … |
| | I was told to use a while loop and call the nextNumber method until the input matches the corresponding fibonacci number, i.e. an input of 4 would give fib(4)=3. I'm getting fib(4)=1. Here is my code: [CODE] /** Class used to generate a Fibonacci number with a given input */ … |
| | a class can have only one constructor??? thanx regads |
| | Hi everybody. I'm trying to display web page that located in my computer or just (google web page). But everytime I'mgetting nullpointer exception. Please help me to figure out the problem. here is the absolute path that I'm using: [CODE]serg@serg-PORTEGE-Z835:~$ find $PWD -type f -name test1.html /home/serg/Projects/java/GUI/src/its/TestData/test1.html [/CODE] But the … |
 | Hello, I've got this problem with an intro to Java class. To lay some background down, the professor teaches the 'theory' behind java, and nothing of actual code, so my knowledge is very limited here. The reason I'm here is I can't discern for the life of me how to … |
| | So basically I have to import a file of names and then be able to sort them alphabetically I've managed to import the file using the followig code [CODE] import java.io.*; public class Name{ public static void main(String[] args)throws IOException{ String contents; File f = new File("names.txt"); FileReader fr = … |
 | I'm getting this error variable might not have been initialized on ch2 and ch3: [CODE]import javax.swing.JOptionPane; public class calculatorJava { public static void main(String[] args) { String ch, ch2, ch3, add1, add2, sub1, sub2, mul1, mul2, div1, div2, choice1, exp; int chans, chans2, chans3, addo1, addo2, subO1, subO2, mulo1, mulo2, …  |
| | I'm making a website and of course want to incorporate memberships and logins, etc and while I understand the theoretical application of salting and hashing a user-inputted password to save the encrypted pass in my database, I'm not sure on the approach... What I would do is get the hashCode … |
| | As i said in the title",. i dont know what was the missing",. (i will just attach the jar file) please help"., by the way", it is a game named sokoban. |
| | hi there, i have this server code that send the received message from one client to all the other clients, including the one how send the message [CODE]public class Chat extends Thread{ static LinkedList<PrintStream> sll; Socket cs; PrintStream ps; public Chat(Socket cs){ this.cs=cs; try{ ps=new PrintStream(cs.getOutputStream()); sll.add(ps); this.start(); } catch … |
| | Hello! I was given the task to finish writing the definitions of the Treeset class methods. I'm currently at the [B]headSet[/B] and [B]tailSet[/B] functions and quite stumped. Here's what they look like currently, with no logic: [CODE]@Override public SortedSet<E> headSet(E before){ SortedSet<E> set = new SearchTreeSet<E>(); headSet(root, before, set); return … |
| | Hi, I have a problem with some resource files (i.e. .txt) which I have created in the project under let's say com/myapp/resources. I have a class created: com.myapp.util.MyClass which reference a file.txt located in resources folder: [CODE] MyClass.class.getResourceAsStream("../resources/file.txt"); [/CODE] The project is created in eclipse. After I export the project … |
 | Any tips on how to connect them? COmments are highly appreciated. Thanks! |
| | Hey everyone, I'm trying to make a button have an image, it used to work but for some reason, now it doesn't. This is the error: [COLOR="Red"]Exception in thread "main" java.lang.NullPointerException at javax.swing.ImageIcon.<init>(Unknown Source) at Main.createImageIcon(Main.java:109) at Main.<init>(Main.java:82) at Main.main(Main.java:103) [/COLOR] I see that the error is the: [CODE]ImageIcon NewFileIcon … |
 | I am wondering if there is a way to make a MySQL database using my java program without actually having a defined username for the admin. for example I would make a program that you could install on all computers in a network that connect to a newly made database … |
| | Hello everyone .. I am new to this excel reading !! Introduction: I have a link to a txt-file(or doc file) in excel file and i need to read a data present in the linked file. I can read normal text present in excel file.. Problem : but not able … |
| | I am attempting to run a junit test against a JAX-WS service method using a simple client class and compiled generated sources from ws-import. When the test is run through surefire while doing either test or install I get the error java.lang.NoSuchMethodError: com.sun.xml.ws.api.model.SEIModel.getJAXBContext()Lcom/sun/xml/bind/api/JAXBRIContext; but when I inspect the xml in … |
| | Hi folks, Right now I'm trying to learn about multidimensional arrays. I'm currently working on an assignment where I have to store data in said arrays. However, the input format is funky and surpasses my knowledge of how I can store it. The problem is generally along these lines. X … |
| | Hi. Can somebody help me? I am trying to create a program that reads random line from a file and displays them. My problem is, it keeps repeating the same line after a few tries. i have 8 total lines from my file... this is my code so far... [CODE]public … |
 | Hello Friends, I have one project in Java but the exe file cant show the system.out.println messages. I want to create a jar file in such a way that the error of file e.g. abc.java should be viewed when I click the jar file. is there any possible way.... |
| | How did you learn Java? I just watched the basic and intermediary video tutorials from thenewboston.com and I'm still not 100 percent. I've moved onto the android application development tutorials which deals with a lot of java, and I still don't totally understand it. It started off with a bunch … |
 | Hi mate, I am doing a mini program in java that let us look up word as a dictionary. I tended to use database to store words and their meanings, but my teacher suggested me using file (or xml). I chose using file (write a vector to file). Can u … |
| | Hi, I'm building a battleship game that has multiple sessions over an apache server. It's a server/client containing servlets & jsp's. Let's say i have a jsp page that shows all the boards, for each session i want this page to be refreshed as soon another player makes a move. … |
| | Can anyone give me an example iniitialing a non zero value using arrays If u cant give an example pls dont respond.Thanks:) |
| | i am using a java program and i need to store two sets of data (radius and thickness) there are elven of these i need to store. my question is firstly how to store these into an array without having to do user input each time. then say i need … |
| | I'm trying to get my JPanel (JFrame?) to resize itself to fit randomly drawn shapes. I have a shape superclass and right now I'm working with my line subclass. Everything is working fine except I can't figure out how to make the shapes fit the size of the JPanel. Should … |
| | I am trying to make a screen recorder, but I am having trouble converting the images I capture to a video. I have done some research, but JMF doesn't seem to work for me(maybe because I am running 64 bit), and I have not been able to find anything else. … |
| | hi I develop MDI App in which we want to child frame to child frame and parent to child frame communication. If any one knew it plz help me. |
| | it involves using a static array to build and hold the coefficients values and evaluate and analyze them as well as to export the results to an external file such as a text file here is what i have so far any help would be appreciated. [CODE] import java.util.*; import … |
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