36,051 Topics
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| | In the following example: [code] public class JavaExample { public static void main(String[] args) { system.out.println(args[0]); } }[/code] when no parameter is passed Exception given is java.lang.ArrayIndexOutOfBoundExpection So my Question is that Why is that Exception is thrown , why not NullPointerException. (I know when both expection thrown) But in … |
| | Hi all, I am attempting to connect to a MS SQL Server Express Edition with Advanced Services (MS SQL10) on a remote Windows NT 5.2 machine on the LAN. My driver is [B]net.sourceforge.jtds.jdbc.Driver[/B] My url for the connection string is [B]jdbc:jtds:sqlserver://127.68.0.201:1433/LOD[/B] My user is [B]d[/B], password is [B]d[/B]. Now, when … |
| | how to execute a java program when we try to delete it....????  |
| | I am creating a java program that will take 10 user input grades from 1-100 and display them as a letter grade, then calculate the percent of how many letter grades there are in total. The last step is to figure out how to get each letter grade, lets say … |
| | Hi, I am working on a calculator using Java Swing, and have it done, but I was wondering how you would make it so, say when a certain keyboard button is pressed, that number will appear in the text box. Currently, it works so when you press said JButton, that …  |
| | Dear sirs, I would just like to ask a quick question: What control would i use for creating a paint-like program but with layered features? It was a choice between GlassPane (but am not to sure how to use it despite the fact i have been up all night researching … |
| | How to isolate digits in a long variable for JAVA? long 122343434434 how to isolate the 2nd number?  |
| | I need to write a code to find greatest common factor of two numbers but I have no idea how? any help? please. |
 | where does eclipse get installed, i know ive choose the folder for the workspace, but not the IDE in its whole. why? im on win32 and i need to drag a shortcut on my desktop thx Fund it, nevermind, it's the uncompress folder and it doesn't install itself. DarkMonarch |
| | My problem is that the image is not showing on my java. here is my code MyGame.java [CODE]package mygame; import javax.swing.*; import java.awt.*; import java.awt.event.*; public class MyGame extends JFrame { Container c; Player p; MyGame() { this.setTitle("My Game"); this.setSize(600, 400); this.setLocation(100, 100); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); c = this.getContentPane(); p = new … |
| | Is anybody familiar with using ObjectEditor in Eclipse? I am working on a program and I need serious help. |
| | So I need help on how to calculate how much change to give back to a customer. I need the program to give change in the least bills and coins as possible. Ex. Customer's item costs $13.37. He/She pays $20. Program gives back: One $5 Bill One $1 Bill Two … |
| | Hello! I have a swing app with lots of components and stuff. I want to place a Container/Jpanel on top of everyting else that is invisible that contains other component which are visible. I can make the panel invisible or not opaque and still show its child component but I … |
| | Hey guys basically I'm studying programming using the 'BlueJ' Java program on windows. I'm trying to create a 'Dynamic Billboard' program that asks a user to enter a 5 letter word than the characters are displayed on a billboard, the program uses a text file imported for the charcters). Ive … |
| | I'm having trouble debugging one of my methods. The class Student inherits a class called Person and the methods are called in the main program, TestStudent. I'm trying to create a method that lets the user sort an array of grade averages in ascending order but whenever I try, I … |
| | i 've got a steganography project in java.......in that we can hide text within pictures and videos......but the major disadvantage is that the hidden data is been destroyed when the image or the video is further modifies with the hidden data............is it possible to do a steganography project in java … |
| | Hopefully someone can help me...I'm a student taking my first Java class. We are working on classes (building them). For this assignment the teacher gave us a test program that we have to build a class for to computer some basical mortgage calculations. Below is the class I built that …  |
| | Hi all, For my java class I need to make the game of life. So far I have 2 main classes that drive the program (ignoring GUI class for now.) My main classes: Cell(x, y) - where x = the x coordinate and y = the y coordinate of the … |
| | Hello I'm having major issues, please help me with this code; (Generating random characters) Use the methods in RandomCharacter to print one hundred uppercase letters and then one hundred single digits, and print ten per line. Use these methods: public static char getRandomUppercaseLetter(){ return getRandomCharacter('A', 'Z'); } public static char … |
| | I'm having trouble sorting names in alphabetical order using counting sort, forinstance Gregory John, Alex Smith, Adam Richard, Alex Ryan Output hould be in this order Adam Richard Alex Ryan Alex Smith Gregory John My code so far [code] import java.util.ArrayList; import java.util.Scanner; public class Names { //private static int[] … |
| | I have had a working jsp web applicationg for the last 2 months. All of a sudden, the application was not allowing users to log into it. After monitoring the logs upon a manual restart of glassfish, I saw the log output below: [CODE][#|2011-06-25T15:58:55.376+0300|WARNING|glassfish3.0.1||_ThreadID=26;_ThreadName=Thread-1;|Error sending syslog packet java.net.SocketException: Too many … |
 | hi all, I am accessing the database by MVC model now i need to create list box , list options already in database .What should I do should i connect database with jsp directly or any option available. Thanks |
| | Hi.. I have downloaded a code to add JRadioBuotton to JTable, modified it.Please see the code..What i wanted was to have blank cell...i was getting a NullPointerException for this so i tried adding a JTextBox for instead. When I click on only radiobuttons the code works fine.. if i click … |
| | [CODE]public GuiPrototypeScreen1() { GuiPrototypeScreen1Layout customLayout = new GuiPrototypeScreen1Layout(); Object[] possibleValues = { "Search", "Contribute" }; Object selectedValue = JOptionPane.showInputDialog(null, "Do you want to ", "Welcome", JOptionPane.INFORMATION_MESSAGE, null, possibleValues, possibleValues[0]);[/CODE] Hey guys i need help because i am completly stuck. All i want is when a string is selected to redirect … |
| | Hello, I'm not able to access jar files from servlet. Although I have imported all the class file and made the jar file available in build path. [CODE] protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { PrintWriter out = response.getWriter(); cmd = request.getParameter("cmd"); System.out.println(cmd); String output = runCommand(cmd); …  |
 | The output is obtained from a JPasswordField and placed into a text. But whenever I enter a new input on the field, it just shows the recent one I've entered... Ex: I enter "test1" as a password. When I enter a new one, say "test2", it only shows "test2" in … |
| | hay this is samar here actually i have to get values from tha my sql foe a perticular string which i pass through a xt box i think i'm not able to pass the vehicle no. to the querry this is my cade pls help [code]package p2c; import java.awt.Container; import … |
| | I am a first time user to Java and I am stuck and cant figure out what to do.. Please help. My code is [code] import java.util.Scanner; public class rshomework2 { public static void main ( String[] args) { Scanner input = new Scanner(System.in); sales; final double base = 800; … |
| | Hello forum, Vaironl here. I have to do an assignment for school and I was about 3 hours designing the prototype and everything was going right but I had to add arrays and a for loop to my system and after that everything just got ugly. Therefore I started from … |
 | I wrote a bit of code at school using a copy of Net Beans that they have installed on the computers in the lab at my school. I saved my file to my thumb drive as Lab2.Java. When I got home I opened my copy of Net Beans 7.0.1 and … |
| | Hi, I haven't seriously written Java code in over 5 years. I am looking to find good online resources to help me refresh in a few weeks. Thanks! Marquita |
| | alright iam working on this code and it is driving me nuts someone please help me alright here is my code :[CODE]import java.util.Scanner; public class TestScoreApp { public static void main(String[] args) { // display operational messages System.out.println("Please enter test scores that range from 0 to 100."); System.out.println("To end the … |
| | I have to write a code that will print out the sum of all numbers between 1 and 100 that 7 and 5 go into evenly. I can't really think of how to write it. This is what I have but it doesn't work.[CODE] import java.io.*; public class work {public … |
| | Yes, I've already checked the pinned thread, all of the suggested books there are for Core java Kindly post good books for J2EE thanks :) |
| | Hi all, I am having trouble with class communication to reset some textfields through event handling. Any help would be appreciated. Here is a portion of my code. [B]The class that contains the textfields that I wish to use a reset button for:[/B] [CODE]import java.awt.*; import javax.swing.*; import javax.swing.border.*; public … |
| | Hello..! I am newbie to java and I have got frustrated using notepad, can anyone please suggest me a good compiler for java. I am using Windows 7 as O.S. |
 | Hello. I recently started studying Java and OOP. I am currently creating a class that writes text to a file in a particular format. I have 'finished' it, and it works, but I am unsure as to the quality of the implementation. This is how it works: * First of …  |
| | I have a two-d array from which I need to read values from any and all sides of each index. for example [CODE]int x=0, y=0; myArray [x - 1][y - 1];[/CODE] where x-1 and y-1 would be the values of the other end of the array. I've been up over … |
| | A quantity known as the body mass index (BMI) is used to calculate the risk of weight-related health problems. BMI is computed by the formula BMI = w/(h/100)^2 Where w is weight in kilograms and h is height in centimeters. A BMI of about 20 to 25 is considered “normal.” … |
| | I am having an error with my constructor, why is that? :| [CODE]public class Name{ private String firstName; private String middleName; private String lastName; public Name(){ this( "null" , "null" , "null"); } public Name(String first){ this(first," "," "); } public Name(String middle){ this(" ",middle," "); } public Name(String fName … |
| | Im having problems with my code. :( the code should. the submenu for my menu should be on a radio button type. here's my first code: [CODE] public ... { //for background JMenuItem image = new JMenuItem("Images"); JMenuItem music = new JMenuItem("Music"); //submenu of music JRadioButtonMenuItem play = new JRadioButtonMenuItem("Play"); … |
| | [CODE]/** * @(#)Car.java * *Chp.3 3.5 * @author Alec Ziff * @version 1.00 2011/9/23 */ public class Car { { public Car(double fuelEffciency) //all values are in miles per gallon { efficiency= fuelEfficiency; } public void addGas(double gas) { double newFuel= fuel + gas; fuel= newFuel; } public double drive( … |
| | [CODE]public class CarTester { public static void main (String[] args) { Car myMysteryMachine = new Car (1000); // Car gets 1000 miles per gallon myMysteryMachine.addGas(20); // 20 gallons of gas are added to the tank myMysteryMachine.drive(100); // Driving the car 100 miles System.out.println(myMysteryMachine.getGasInTank()); // Method prints the remaining fuel } … |
| | want to print Jframe like our word document. I have one jframe on jframe i have Jpanel ond on that panel i have j label . In jlabel i written a letter i want to print that letter so how can I print that letter. thank you |
| | DiceRoller.java You are to write a program which will ask the user for the number and type of dice they would like to roll in the form of “xdy”. The x represents the number of dice, and the y represents how many sides the dice have. Your program MUST read … |
| | Ok, I have this project In which I have to Write a Java program that can simulate a truck delivery, using the Java console as the exclusive input and output device. That is, each input to the TruckItem class, either unload or load an item (meaning creation of an object … |
 | hey there, I am trying to build a small around soccer/football matches. So, I have built a class that models a Match (Match.java). It only contains field variables like hostid, guestid, matchid, result, and such, and setter and getter methods. When I retrieve matches from my sqlite database, I build … |
| | I got a homework, its due by monday. I have read textbook a lot but i still dont know what to do next steps. Here is problem. The program should prompt the user for and accept two inputs: 1. The total price (including any applicable tax, etc.) for whatever was … |
| | Dear friends , I am new to java . I created an JFrame(Calculator) application in Netbeans.Now i want to run that file from console(putty) since i gonna use that .java class in some other program through which i want invoke this . How do i do this . When i … |
| | Problem 2. Create a new java file called Barcode.java that will check to see if a given barcode number is valid. Barcodes have a 12 digit number on them that is used to determine the validity of the code. This is done by summing the odd position digits (1,3,5,7,9 and … |
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