36,051 Topics
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| | Hi everybody Help me please to figure out what's wrong with my code When I try to compile it it gives me an error ClassNotFoundException I have never had such an error befoure, so I don't know what to do.... [CODE]import java.util.LinkedList; import java.util.List; import java.util.ListIterator; public class Example { …  |
| | Hello. My code describes Color classes: [CODE] abstract class Color{ private final int H=45; private int V; private int S; Color(int V,int S){ this.V=V; this.S=S; } public int getV(){ return V; } public int getS(){ return S; } public void setV(int V){ this.V=V; } abstract void print(); } class Black … |
| | Hi, I am a java learner, i have installed netbeans 7.0 and i have also installed the glassfish server, but there is no database options available , please provide me help how to install the java database in netbeans Regards, Bharathi |
| | import java.util.Scanner; public class sfera { public static void main(String[] args) { //Langkah 1:Baca input dari pengguna System.out.print("Masukkan nilai jejari: "); Scanner input = new Scanner(System.in); final double PI = 3.14159; double jejari = input.nextDouble(); double luas; double isipadu; //Langkah 2: kira luas luas = 4 * PI * jejari …  |
| | Hello, When I run the following program, the applet window displays nothing. I will be grateful for any help. [CODE] import javax.swing.*; import java.awt.*; public class BoxPanel extends JPanel { private JTextField label1, label2; public BoxPanel() { setLayout(new BoxLayout(this, BoxLayout.X_AXIS)); label1 = new JTextField(20); label2 = new JTextField(20); add(label1); add(label2); … |
| | Hey I have an assignment to get a number from the user and print it as a string with commas in the correct space. For example if the number is 13904 it should read 13,904 or 1005 should read 1,005. I have to do this recursively. Working on my pseudo-code … |
 | [ATTACH=RIGHT]16645[/ATTACH]Oracle announced Thursday evening (August 12) that they would be filing a lawsuit against Google, claiming that their Android phone software infringes upon patents and copyrights of their Java software, which they acquired when they purchased Sun Microsystems in January for $7.4 billion. "In developing Android, Google knowingly, directly and … |
| | Evening all, My assignment is as follows: Consider a program that administers multiple-choice quizzes. The student needs to provide a response such as A or D. Your job will be to check for input errors in the student response string. Check that the string has length 1, and that it …  |
 | My ten year old has learnt quite a lot of java and wants a few BEGINNER projects. Any ideas?  |
| | I want to add a progressBar (just to show that something is happening) when the database rows are fed into a table. First I tried to create a frame, where I added progressBar. I called frame.visible in the while loop which populates the table with database datas. But the frame … |
| | I have a simple program with a potential complicated output (see below). I am asked to make a simple for loop that displays results in GUI. Can I do this without with showmessagedialog instead of doing a JTextbox/label ect? I need this: sample gui output: After year 1 $11000 After … |
| | i want to use use javamail Api and i am not able to understand which server i use or is there is any other api available which is better then javamail Api.please suggest me |
| | I have the following code which allows a user to play Rock, Paper, Scissors with the computer. The code allows for 10 rounds and counts the number of wins and ties. I need to allow for user misspelling by allowing the input to be accepted if the user types the … |
| | ASALAM-O-ALIKUM i want to read a mp3 file in java and shows the data on console output. i can read header data but i dont need it. i want a ACCURATE DATA FROM WHICH I CAN EXTRACT SUCH A FEATURE which tells the mood of song i.e sad, happy, romantic … |
| | 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); … |
| | in line 7 I have three errors. TextFieldOutputDemo.java:7 '.class' expected (where it points to 't' in "throws") FileOutputStream(String, boolean)throws FileNotFoundException; TextFieldOutputDemo.java:7 ';' expected (where it points to 't' in "throws") FileOutputStream(String, boolean)throws FileNotFoundException; TextFieldOutputDemo.java:7 not a statement (where it points to 'F' in "FileNotFoundException") FileOutputStream(String, boolean)throws FileNotFoundException; [CODE]import java.io.*; public … |
 | I need to keep a string from resetting each time the class is called, but haven't found any good way of doing it ... Every time [B]if (block != LastC){}[/B] evaluates to true. ( which shouldn't happen very often ) [CODE] --- code snip --- public class Player_Move implements Listener … |
| | An assignment I'm working on requires me to write a method for the sole purpose of calling that method in a later method. As such I am required to write the first method to not display anything on screen and then I need to comment the calculation within the method. … |
| | i was watching a tutorial about bubblesort, and i followed all the instructions the difference is that the tutor is using System.out while im using JOPtionPane, please help me thank you help me find my error and help me run it correctly! [CODE]public static void main(String[] args) { // TODO …  |
| | After an hour of browsing the web, I decided to ask for help for my IB project (can't paste my whole code or I'll be cheating off myself). I don't have much experience, so please explain whatever syntax your solution may have (please don't say rewrite the whole thing). Anyway, … |
| | this my code import java.awt.*; import javax.swing.*; import java.awt.event.*; public class Panel extends JPanel implements ActionListener{ private JTextField weight,height, answer; private JButton calc, clear, exit; public Panel(){ this.setLayout(new GridLayout(2,1)); JPanel topPanel = new JPanel(); topPanel.add(new JLabel("WEIGHT(KG)")); topPanel.add(weight = new JTextField(5)); topPanel.add(new JLabel("HEIGHT(M)")); topPanel.add(height = new JTextField(5)); topPanel.add(new JLabel("BMI")); topPanel.add(answer =new … |
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