32,204 Topics
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| | Hello, everybody, I am doing my Java homework and we used this line in class with no problems at, I have the code from the program we used in class and it works on my computer no problem. However, when I put it into my homework's code, it gives me … |
| | Hi folks. I'm new here so appologies if I'm not posting in the correct place. Here's my issue. I want to paint independent graphics on the same JPanel. I thought that I could create a method that paints my image(s) then call this in the constructor, but not sure what … |
| | Hi to everyone l have this assignment to do: Synchronize access to the instance variable, accBalance. Because accBalance is a double and not an object, it cannot be used as the monitor. Use synchronized methods or synchronized blocks of code, as appropriate. Simultaniously test two threads. Because the threads can … |
 | I'm trying to run a simple servlet that counts the number of times a user visits the page using cookies but I'm getting the following error. I thought that NullPointerException was because there were no cookies at all in the browser. But after checking I found a couple of cookies … |
| | I want to update a record of a gym member when his/her weight change. But unfortunately my program can't find the given member. Here is my code: [CODE] public static void updateWeight() { Scanner in = new Scanner(System.in); // Creation of a new Scanner object String tempName = ""; // … |
| | Hi, I created a game in which players take turns entering their symbol by clicking on a box that is implemented on a grid window. I am having a hard time being able to check if the player has four symbols in a row diagonal or up or down or … |
| | I'm noob at GUI Swing. I have 2 questions. 1)I'm trying to implement a program that reads a text file, so I can use it to add multiple tabs to the program based on the amount of data in the text file. For example, text file have 3 names. I …  |
| | hi everyone you guys helped me many time this time again i need your help Actually i want to learn struts frame work and i read the content of 2-3 sites but i m not able to learn how to run my first simple application. Can any one help me … |
| | I want to count the total no of rows in a table [CODE] Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); Connection con = DriverManager.getConnection("jdbc:odbc:gabbar"); Statement ps1 = con.createStatement(); ResultSet count = ps1.executeQuery("SELECT COUNT (*) FROM products ); //products is a table in database [/CODE] count is of ResultSet type.but i want to do arithmetic operation on …  |
| | I want to build a network protocol analyzer, but I really don't know where to start. Obviously, I don't want the code in hand, I can think it up myself -- but the problem is a little more specific - where do I look at to get the IPs passing … |
| | Hi everybody. I'm working on my program. And have this output storred in the object puzzle: [CODE]Puzzle is: 1 5 9 13 2 6 10 14 3 7 11 15 4 8 12 16 2 6 10 14 3 7 11 15 4 8 12 16 5 9 13 1 …  |
| | Hi guys, So I'm doing an assignment right now. One of the tasks is about listing files. It wants you to insert a name, either directory or a certain file, and give you a message with some informations. So I'm trying to finish the part where I enter a directory … |
| | The problem is, that I want to read data and analyze it from a promiscuous network device programmatically using java. Using existing software like WireShark/DarkStat is NOT a solution. I wanna do it myself. Any hints on where do I start? |
| | What I want to do is 1. Take strings from the user and store it in a vector<string> 2. Loop through each string, typing each letter of the string How would I go about doing this? Robot r = new Robot(); [CODE]char letter = 'a'; r.keyPress( (int) letter )[/CODE] Won't … |
| | Alright, so I tried to write a little short guide on Object Input and Output to files, since the worst situation one can find themselves is being unable to serialize files in a proper and readable format. One way to do so is to create an object of a class … |
| | hi, our final exam will be on next week, i want our program to be different may i ask how to put colors on texts of JOptionPane on the background and how to change font size and style and how to put sound effects.. please make it easy to understand … |
| | Error :: org.springframework.web.servlet.DispatcherServlet noHandlerFound I am attaching all the relevant files. Please help..?? web.xml [CODE] <?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5"> <servlet> <servlet-name>loginSer</servlet-name> <servlet-class> MyPackage.LoginServlet </servlet-class> </servlet> <servlet-mapping> <servlet-name>loginSer</servlet-name> <url-pattern>/LoginServlet.do</url-pattern> </servlet-mapping> <servlet> <servlet-name>Timeserv</servlet-name> <servlet-class> MyPackage.TimeServlet </servlet-class> </servlet> <servlet-mapping> <servlet-name>Timeserv</servlet-name> <url-pattern>/timeservlet</url-pattern> </servlet-mapping> <servlet> <servlet-name>filter</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> … |
| | My server is in python and I'm trying to read and write to socket using ObjectInput/Output Streams whenever i write to socket there is some characters written in socket before my writeObject() command is executed and whenever i tried to read the data from socket using readObject() , it gives … |
| | Hey, I created a phone directory program. But I was wondering if I could get some hints on how I could create a txt file and add, delete names and numbers on the txt file. [CODE]import java.util.*; import java.lang.*; import java.lang.Object; import jpb.*; public class PhoneDir { private static LinkedList … |
| | ChatBot class: A chatbot is a computer program designed to simulate an intelligent conversation with one or more humans. In this lab, we will establish the framework for our chatbot, which will be enhanced throughout the semester. The ChatBot class will define a name field that identifies the chatbot (name … |
| | How i can make my server receive data from certain client and send it to other certain one ? (Note : there is a lot of clients connected with that server) , that's alike private chat between two clients . |
| | Here is the code for the programm. My question is why this statement in SudokuValidator doesn't work? [CODE]for (Cell[] myPuzzle : puzzle) {[/CODE] it gives me errors: [CODE] Exception in thread "main" java.lang.NullPointerException at SudokuValidator.isSolution(SudokuValidator.java:54) at SudokuValidator.main(SudokuValidator.java:27) [/CODE] [CODE]import java.util.*; public class Cell { int value; public Cell() {} // … |
| | [CODE]import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; class Mortgage { private static double round(Double val) { // round the value to two decimal places int vala = (int) (val * 100); return (double) (vala / 100.00); } public static void main(String[] args) throws IOException { double loanAmount = 200000.00; // Loan …  |
| | [ICODE]System.out.println("Extra credit\nRe-enter number of seconds:"); int j = input.nextInt(); int i =(j/60); int k = (j%60); System.out.println(j+" seconds is " +i+" minutes and "+k+" seconds.");[/ICODE] Hi when i key in 30 for j the correct answer should be [COLOR="Red"]30seconds is 0minutes and 0seconds.[/COLOR] However my above code gives me 30seconds …  |
 | I am having trouble understanding how to set up the smtp property. I do not have internet connection now. I wanted to use my Outlook or something. What do I do to get Glassfish to generate emails so I can begin learning how to code my app to send emails … |
| | i can not understand my Home work plz help me this is the Question ...... Problem 1. Write a program in which you will do the follwing: 1. Declare a two-dimensional array of double with 12 rows and 30 columns to store daily temperatures for one year assuming each month … |
 | Hey I want to get the date and time with miliseconds in a format such as: 2012-02-09 12:41:52.982 or 2012-02-09 16:41:52.129 How can I do this in Java? (If I can get a localized version of "Tuesday" as "Tues" as well even better but if not, I dont mind. Something … |
| | [CODE] private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: String sql="Select BADGE_NUMBER,FIRST_NAME from POLICE_TABLE"; try { Class.forName("org.apache.derby.jdbc.ClientDriver").newInstance(); Connection con= (Connection) DriverManager.getConnection("jdbc:derby://localhost:1527/Traffic Ticket System","Administrator","admin1234"); /*As we are creating a connection on a local computer we will write the url as jdbc:mysql://localhost:3306 */ Statement stmt=con.createStatement(); ResultSet rs = …  |
| | help me plz The program does not sum the elements of the 2 matrix this my code [CODE]package javaapplication143; import java.util.*; public class JavaApplication143 { public static void ReadMatrix(int [][]a1 ){ int val=0; Scanner input=new Scanner(System.in); System.out.println("Enter 3 rows and 3 Columns for matrix 1 "); for(int i=0 ; i … |
| | Hello, Can anyone pls help me out with this code, its the server portion of the client server program..i have downloaded it from net [code=java] Socket s,s1,s2; ArrayList al=new ArrayList(); ArrayList al1=new ArrayList(); ArrayList al2=new ArrayList(); ArrayList alname=new ArrayList(); MyServer()throws IOException{ ServerSocket ss=new ServerSocket(10004); while(true){ s=ss.accept(); s1=ss.accept(); s2=ss.accept(); al.add(s); al1.add(s1); … |
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