36,051 Topics
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| | Guys I have an homework activity creating a simple calculator and I encountered some errors in my code can someone help me out of this activity or revised my code. My code have not finish yet and still thinking how my calculator works or what code to be in functionality. …  |
| | I am writing a selenium test, where I am suppose to verify if the injectedheader parameter is appearing in the post or http request. Can someone please help me to achieve this. |
| | Hi all, Problem in retrieving the value of the form variable. Followed these steps: Created .jar file out of the .class file generated. jnlp file is working fine and the dialog box for open / save file is opening. but not able to get to file path. Can you please … |
| | public class Library { public Library(String Libraries) { } private String Library; public static void main(String[] args) { Library firstLibrary = new Library("10 Main St."); Library secondLibrary = new Library("228 Liberty St."); //errors in this part, cannot find symbol //Symbol: class book //location: class library.library [COLOR="Red"]firstLibrary.addBook(new Book("The Da Vinci Code")); …  |
| | I'm trying to change the user inputted date into a date object so that i can format it into a date format then display it in the selected format in the textarea [CODE] import java.awt.*; import java.awt.event.*; import java.awt.CheckboxGroup; import java.text.DateFormat; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Date; public class radiobutton … |
| | Hey guys, this is my first post here and I need a lot of help. I'd like to start off by saying that I'm VERY new to this so I might have some really obvious errors in here/my code might not make sense(i hope this is not the case) and … |
| | I have to open a dialog box to browse file and to get the file path..Similarly a location to save a file. both these tasks need to done in the CLient machine ,because its a web application hosted in the server. I tried using JNLP.Its opening in the server itself … |
| | I have made a tetris game on my own and am trying to have options in the menu where when clicked, will change the frame to that size such as small, medium, large. I am trying to do this on a frame and at first I tried setting the preferred … |
 | can I use the try...catch statement on java to stop the execution of codes on error? just like the exit sub on vb  |
| | I have to display the following pattern using a loop: @@@@@@@@@& @@@@@@@@&& @@@@@@@&&& @@@@@@&&&& @@@@@&&&&& @@@@&&&&&& @@@&&&&&&& @@&&&&&&&& @&&&&&&&&& I have the following program that is using a loop but it displays 9 rows of 10 @ symbols instead of incorporating the & symbols. What do I need to do … |
| | hey guys i'm having problem to my code in MAGIC SQUARE [B]Output of my current code[/B] 0 1 8 7 5 3 2 9 4 it's a little bit confusing.. the 6th digit turn to [B]0[/B] any help will be much appreciated :) thanks in advance [CODE] import java.util.Scanner; public …  |
| | This program is supposed to display a frame with a label that contains an image,two buttons, and a text field. When the user clicks the button the image is supposed to change. I know I don't have the code for the change in the text field. I am just trying … |
| | I'm supposed to create a factorial application that prompts the user for a number and then displays its factorial. The factorial of a number is the product of all of the positive integers from 1 to the numbers. FOr example, 5! = 5*4*3*2*1 |
| | Hi. So here's my code [CODE]public class TextFileIO { static Console c; // The output console static int total; public void askData () { int line = 0; int i; c.print ("Enter the number of words you're going to input: "); total = c.readInt (); File dataInput = new File … |
| | [CODE]/** Programmer: Jennifer Mercer Date: 12/12/2011 Course: PRG/420 File: Calculator.java Requestor: Dwain Hammer Billings MT Request Description: Write the program in Java (without a graphical user interface) and have it calculate the payment amount for 3 mortgage loans: - 7 year at 5.35% - 15 year at 5.5% - 30 … |
 | I am trying to make a storyboard program, but I am having trouble displaying the currect amount of windows per page. my basic program looks like this [] = button to open editor [+] = add new button [>] = next page [<] = previous page Frame [] [] [] … |
| | Hi. So my problem is that my loop doesn't stop. Here's my code. [CODE]public void askData () { String word; String stop = null; int line = 0; File dataInput = new File ("dataIn.text"); c.println ("In order to stop, just leave it blank."); c.println (); while (true) { try { … |
| | hello! i want to learn mobile applications using java.i know java and wana learn that now. please can anyone tell that how to learn and links or books to refer ?? |
| | can anyone explain me this concept that "static members of a class can access only static variables?" any simple code as an example to show this? |
| | Hello, To get right to the point i would like to ask for some suggestions regarding writing Java GUI applications. I have so far only done small GUI or Console applications that consisted of max 2 classes aka. 2 files. But now while back i decided to take on a … |
| | I am trying to implement an enrollment organizer for a university but I would ask how to implement the aggregation relationship in Java. this relationship exist for academicStaff class and the supervisor class in which the academicStaff (e.g prof.) can be a supervisor to multiple courses in a specific semester. … |
| | I have Java final test tomorrow it is my first time learning and I don't know when to use some code or how to use it ? I have prepared the questions that I don't know can you answer them please 1-how can I know that I need an array? … |
| | Hi there, I am trying to display three Attributes assigned to each "Student" which variables are defined in my 'Student' Class. In my show student class, I can get the user to decide how many Students they would like to add, and i also get the user to input the … |
| | I realise some members have discussed this topic before but it seems quite complex. I'm starting Java and have a longterm goal of creating an internet messanger for school computers. I was just wondering what the pseudocode of this project/task would be. Thanks |
| | The issue with my program is that it does not calculate how many times the specific value has occurred. I believe that I have everything in place, but I'm not sure to as why it wouldn't work. Any help and/or feedback is kindly appreciated. Thanks! Ok, so basically this program … |
| | I couldn't save the new things when i tried to pass in new value inside inner class. The error message is local variable item is accessed from within inner class; needs to declared final. Guide me please. thanks in advance [CODE] public class Broadcast{ protected String title; public Broadcast(String title){ … |
| | [CODE] import javax.swing.*; import java.awt.*; import java.awt.event.*; public class Test extends JFrame implements ActionListener { JTextField t1=new JTextField(10); JTextField t2=new JTextField(10); JTextField t3=new JTextField(10); JTextField t4=new JTextField(10); JTextField t5=new JTextField(10); JTextField t6=new JTextField(10); JButton b1=new JButton("MakeReservation"); JButton b2=new JButton("DeleteReservation"); JButton b3=new JButton("searchReservation"); JButton b4=new JButton("printResrevation"); JButton b5=new JButton("clear"); JButton b6=new … |
| | Below is what I have been attempting to do. [code]retrive number of rows from MySql table; for(int i = 1; i <= numberOfRows; i++){ retrive userID, level at position(i) in table; // next i need to insert userID into array, level amount of times (ex. userID = 4, level = … |
| | I get an error "Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: javax.swing.JButton cannot be cast to javax.swing.JPasswordField at def3.password$MyActionListener.actionPerformed(password.java:103)" in the following code, what am I doing wrong? [CODE]static class MyActionListener implements ActionListener { private String userInput = "username"; private static final String passText = "password" ; JFrame frame ; MyActionListener(JFrame f){ … |
| | The issues with this program are: 1. File: D:\Unit 3 Data Type, Objects, Assignments\CreditCardBill.java [line: 20] Error: Type mismatch: cannot convert from double to int 2. File: D:\Unit 3 Data Type, Objects, Assignments\CreditCardBill.java [line: 21] Error: Type mismatch: cannot convert from double to int EDIT: I have tried type casting, … |
| | What are the API's I have to use for making a online radio station through Java/Jsp..? |
| | I am trying to create a menu GUI. I think I am having problems with the action listeners Any help would be great. Thanks Write an GUI application that display a menu system. The menu system should allow the user to select one package, one phone, and any of the … |
| | Hey guys, I'm currently at the very end of my java course this semester, and I was wondering if anyone could help me finish the last 3 of my 8 method in a program called Mastermind. The difference between typical Mastermind games and my assignment is that we're using numbers … |
| | Hi there, My question is how could I output byte value (meaning zeros and ones) to screen. I just want to try some shifts and see how it works. |
| | Hello, I am writing a program that creates a tree (similar to BST) where each node is made up of an arrayList (which is limited to a certain number of items each node) and 2 pointers (left and right children) The strings are made up of 0 and 1. The … |
| | Hi, I am having a problem with this program. I don't know why the counter won't work correctly. After "doctor is out" is clicked the inCounter should be zero. So when the "doctor is in" is clicked "the doctor is in" should be displayed, but "the doctor IS IN, Already!" … |
| | Hello every body>> ^_^ I want your help, I have done code that retrive data from the databse and the user can add data in the database , I want to do validition for student ID, if its in the datase before (if its valid before or not) I need … |
| | Need some help fixing the errors in my code, im TRYING to make a math expression type of program, using stacks. Was running fine, then i wake up in the morning and my code has like 15compiler errors, would appreciate any help!! [code] import java.util.*; import java.io.*; public class d8 … |
| | Even after I set a for loop in my constructor I receive a null pointer exception any ideas why? here is a bit of the code [CODE] private String[] ingredientName,units = new String [40]; private double[] ingredientAmount = new double [40]; public Recipe() // Recipe Constructor example { for(int setVals … |
| | hi, I am wanting to rotate an image 90 degrees when you press a button. However so far i can only get it to rotate once, and then it stops. I've tried rotating the image on its own and using the label to rotate it Here is my code BufferedImage … |
| | I've made a small program that draws black rectangles on a JPanel at random places. I would like to give the user the option to save this JPanel as a .gif file, but I'm not sure where to start. The function I need to write is SaveJPanelAsGIF below on line … |
| | I've done some searching, and it seems a few people have asked similar questions, but none of them were quite what I was looking for. I need to be able to read lines of code from a .txt file, and then execute them in Java. Or, if that's impossible, would … |
| | Hi!! my application have 2 frames including tabel 1,tabel 2 when run time i insert values though textfileds to tabel 1 ,after inserting 5 or more then i click next button then display other frame with tabel 2 and tabel 2 must auto filled. my problm is last row(i already … |
| | Hi, I'm new to Java, getting compiler error for the following code: class A { int x; A (int a) {System.out.println ("class A");} } class B extends A{ int x; B() {System.out.println ("class B");} public static void main (String[] args) { A a= new B(); } } The compiler error … |
| | Is there a "neater" way to code the following? (It prints the 5 data elements in an array.) System.out.println("All the values in the array are: "); System.out.println(+ array1[0]); System.out.println(+ array1[1]); System.out.println(+ array1[2]); System.out.println(+ array1[3]); System.out.println(+ array1[4]); Thanks, Bud  |
| | Good day! I was writing a code that will compute the salary of each employee on our school depending on their position using a FileReader(File Handling). I only managed to do this code and don't know how to start again [CODE] import java.io.*; import static java.lang.System.out; public class admin { … |
| | I have an assignment here.Can anyone Please help me in doing it because i haven't copied the codes that my prof gave me. Using BufferedReader create a program that will complete the salary of the employee. Use the ff: formula: BasicPay=Rate * Number of hours worked OvertimePay=(rate * .30 + …  |
| | Hello, I'm trying to write a code to check if two strings are anagrams. i have already figured out a code but I can't get it to work for words of different cases and words with whitespace. I would really appreciate any input Thank you! Here is what I have … |
| | hi how are you gays in java i have question about constructors , i just starting learning java since few weeks [COLOR="Red"]how i can define string in construtor using one argument ..[/COLOR] how many constructors are there in the string class >? how i can count the number of words … |
| | hello to all my program creates a boolean for mailing and outputs "i brought my ride " when it is false i.e the customer will not like his purchase to be delivered and outputs "your purchase will be delivered " if it is true...... my problem is it outputs your … |
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