36,051 Topics
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| | Last week I was working on some assignments using JDBC and now when I try to run programs in Eclipse this is what I get...and this is only part of the message that appears in the Console box instead of what should show when I run a program. What did … |
| | Sorry everyone i'm new to java and i have an assingment which i have hand over soon i just want get an idea how to calculate car insurance premium based on the age,Licence and Engine size this is my first time come in to this site even so.. if you … |
| | Hello, World! My name is Alex and i am a beginner in Java. I tried to create 2 simple objects from the same class and give them the values inputed from console( as string). Is this correct or it should be done in another particular manner? Also, the constructor asks … |
| | I am trying to build XML to csv conversion The problem is extended attributes ( <AttrList> ) that I do not know how to read: This is the XML: <?xml version="1.0" encoding="UTF-8"?> <ProductCatalog> <Product> <ProductCode>FFC4UINTSATA</ProductCode> <Vendor>INTEL</Vendor> <ProductType>Cable</ProductType> <ProductCategory>Cables</ProductCategory> <ProductDescription>INTEL SAS/SATA internal cable (4xSerial ATA 7-pin (Male) - 1x (Male))</ProductDescription> <Image>https://www.it4profit.com/catalogimg/wic/1/FFC4UINTSATA</Image> … |
| | Hi, I have one class where JFrame is created and 4 classes (JPanels - Menu, Game, Score, etc.). In the class, where I am creating Frame I also create new Menu (JPanel) .. in menu, I have 4 buttons. If I click e.g. on a button Start ... the new … |
| | I am trying to create Menu to may 2D game in Java. But the game is not responding to pressed keyes. Menu is working, but when I choose new game in menu, game starts but it does not react to pressed keyes. But, when I remove menu, game is responding … |
| | I am using javaCC to parse through sql statements and put the data in corresponding lists. I have made the grammar for a create table that works well but now I need help on making a insert statement grammar. This is the create table grammar that I have used but … |
 | I am trying to style a log in menu that is created by this snippet i have here (generated by javascript): <script> var password; var correctpassword = "DaNiWeB"; password = prompt ('Enter the Correct Password to view this page:',''); if (password==correctpassword) alert('Thank you for properly entering the password, you may … |
| | I was wondering if anyone had a good implementation of a List of list. The reason is to create rows and columns sort of like a database or spreadsheet format. I would like to insert data into the list and print it in the format of Column Column Column Column … |
| | I am creating a method to multiply 2 polynomial expressions together such that: `3x^5 * 2x^3 = 6x^8` -> Where the coefficients are multiplied and the exponents are added together. My test case for this would look something like the following @Test public void times01() throws TError { assertEquals(Term.Zero, Term.Zero.times(Term.Zero)); … |
| | Hey can you guys help with this? Basically with all that is left? Thank you! import javax.swing.*; //for JFrame import java.awt.*; //for Graphics and Container import java.util.Random; import javax.swing.JOptionPane; // other import statements here public class RandomGraphics { // constants are used to draw the grid, and for you to … |
| | My applet creates a new sound every time an impact occurs, which is very frequently. How come, when the sounds become too numerous, the game ceases to run smoothly? Here is the code that gets called many, many times: class soundThread extends Thread { String sound; soundThread(String i_sound) { sound … |
| | I have to mirror a piece of the picture right to left. Here is what I have: My picture stays the same everytime I run the code. I even switch my for loops to see if it would make a difference but it doesn't. My picture just stays the same. … |
| | Hi, This code doesn't seem to compile. I can't seem to figure out what's wrong with it. The error I get is: **cannot find symbol - method contains (java.lang.string)** public void getName (String name) { for (olympian filename: Olympians) { if (filename.contains(name)) { System.out.println(filename); } else { System.out.println("Nothing found"); } … |
| | Still playing with multi-threading and Prod-Con, at this point I've been at this for days. Would love some help debugging; thanks in advance. http://pastebin.com/jhHB9kTY - Main http://pastebin.com/BZSspf3x - Consumer http://pastebin.com/ndzAADJz - Producer http://pastebin.com/p7YdzH1D - Product http://pastebin.com/rxs3WzDT - Message http://pastebin.com/JR5ywgz1 - Utiliy 2 Producers, 4 Consumers Essentially Producers push a message … |
| | I am writing code in java to support a working database. What I mean by that is I will have linked list store the data(I plan to change later) and use a parser to break down sql statements in turn interacting with the linked list. The question I have is … |
| | Hi, Why does this piece of code throw me an error saying: **cannot return a value from method whose result type is void**? public void orderTotal() { int total; for (Order filename: Orders) { total = filename.getQuantity(); } return total; } |
 | Hi folks. I am in search of automated swing builders (stylish jframe builders). Basically like IDE's. Yeah I am well familiar and bored of this netbeans, eclispse, etc. Can anyone suggest me some tools that will create some cool and **stylish** jframes or swings by just drag and drop.. I …  |
| | i need help to write a code for the folllowing question. A realtor wishes to track her commissions of house sales. The information that she collects is as follows: house address a string house type a string ( split level, bungalow, etc.) sale price a double She wishes to calculate …  |
| | hi every one =) I just started to learn trees in java but I am kind a lost with it is implementation I need to understand implementing and tracing methods useing tree interfaces please post any recommended source , tutorial or lecture thank you |
| | Hi, I was creating clone of breakout and got the game working correctly. But after setting up menu my keyboard doesnt respond anymore. But if I launch game directly without Menu class keys are working perfectly. Where the problem might be? Here is the full source code. VBreakOut.java package net.viped; … |
 | The code below compares three numbers and it prints out the Maximum and Minimum value, let me hope it will rescue somebody :) import java.util.Scanner; public class MaxMin { public static void main(String args[]) { int w,x, y; System.out.println("\n\nTHE PROGRAM BELOW CALCULATES AND OUT PUTS THE MAXIMUM AND MINIMUM OF …  |
| | Hello, I'm in a pickle. (Please observe the code) In the actionPerformed method, I don't know how I can get the value of the variable 'minutes'. I can get 'hours' by e.getActionCommand(), but can't do minutes that way. I need to get both 'hours' and 'minutes' at the same action. … |
| | Consider the following: for (int counter = 1; counter < 1; counter -) How many times will the loop execute? |
| | I have a Java class called Term holding polynomials like below public Term(int c, int e) throws NegativeExponent { if (e < 0) throw new NegativeExponent(); coef = c; expo = (coef == 0) ? 1 : e; } I also have an equals method in the same class like …  |
| | Hi, I'm having some trouble writing a method to sort a LinkedQueue ADT. I find it difficult to keep track of the order things when sorting is concerned (ha ha ha). I'm trying to pull the values out of a Queue which store objects of type PrinterItem. Those objects in … |
| | I am making a project using hashtables. I have to use a linked list to handle duplicate hashcodes. The Objects that I am turning into hash tables are State objects with just a String name. I have debugged and tested my entire project and cannot figure out why it is … |
| | Hi all - I need to read a text file using a scanner class that has the following format: 5 5 5 5 5 5 5 0 0 0 0 5 5 5 0 5 5 5 0 0 0 5 5 5 5 0 0 2 0 The first … |
| | Hi, I am creating a simple game and I my game thread and my player2 thread seem to be executing twice each time the Thread.Sleep() expires. This is the output: Starting game: Player 2 thread Game thread Starting game: Player 2 thread Game thread Player 2 thread This is the … |
| | Hi guys, i dont think im using the boolean and break correctly i need it to see the tutormin>=240 and then throw the error and stop without exiting the program. can someone take a look and help me edit it import java.awt.*; //imports all Java.awt import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import … |
| | Using java, I need to parse a json text file that will contain data according to the layout shown below. The number of email addresses per store will vary. The point is to get a list of stores & corresponding email addresses, then send emails to the addresses. I have … |
| | Hi, I am really struggling with a bufferedReader method i am trying to implement. I have to read text from a file like this : Poland Franciszek,Smuda,63,2009 1,GK,Wojciech,Szczesny,22,11,0 2,DF,Sebastian,Boenisch,25,9,0 3,DF,Grzegorz,Wojtkowiak,28,19,0 4,DF,Marcin,Kaminski,20,3,0 5,MF,Dariusz,Dudka,28,65,2 6,MF,Adam,Matuszczyk,23,20,1 and store it in an array of objects (mine being an array of Player objects which stores … |
| | Hi everyone, I've been trying to turn one of my programs into an executable application, but every time I click the jar file or open it using the command prompt nothing happens. I was wondering if I shouldn't be using "System.out.println" and Scanners to take input/display output. I am using … |
 | Hey Friends, Developing an Online Shopping System. Firstly had posted a code regarding MD5 Encryption and it was solved very quickly. Require the same help again. While registering an image selected by the User should be inserted into the Database. Posting a Code which follows the DAO Pattern but i … |
| | I keep getting a .class expected error in the if statement. help please. private int[] hand; private int[] play; public PokerHand(){ this.hand = new int[5]; } public boolean haveCard(int card){ if (play[] == card) return true; } public void displayCards(){ System.out.println(hand); } public void dealCards(){  |
 | Does a Java applet have to contain a "main" method or does it run from the "init()" method. I have written a small game in java following and example in a book however it does not tell you how to run the damn thing. Code has no erros from what … |
| | Hi everyone, We all face dificullity in coding recursivly, maybe most of new codders and CS students. However, **my question today is related to How many number of execution been made by the recursive method.** Which I think a bit tidious. I'll be updaing this article with new questions any … |
| | Hi, I have been asked to create a method to store information on the football players for the polish team. I have stored each player in an array of Players[]. My task is to output any players which match the search string. So the method I have to create is … |
| | I'm probably doing this wrong, because there has to be a way to do this. Here is my current code: import javax.sound.sampled.*; public class soundHandler{ soundHandler() { } public void newSound(String sound) { new soundThread(sound).start(); } } class soundThread extends Thread { String soundName; Clip clip = null; soundThread(String i_soundName) … |
| | I am trying to create a checker program(for a sudoku puzzle) that will read a completed board and then go to determine if it obeys the constraints. If it does, it just says so, if it doesn't it reports the conflict. Where should I start? Thanks. |
| | Hi, I'm working on an assignment where I have to convert military time to standard time. I think I mostly have it solved except for when the minutes are between 0 and 10. For example, 909 should read 9:09 am, but it prints 9:9 am. I'm not sure how to … |
| | Hi, Can anyone tell me what is wrong with this code? It seems to be throwing me some error: **non-static method getName() cannot be referenced from a static context.** public void printOrders() { for(Order filename: Orders) { System.out.println("Name: " + Order.getName()); System.out.println("Quantity: " + Order.getQuantity()); } } |
| | Hi, not too sure if Web Development is the right place for this but anyway: I've never done any web development and I have never created a Firefox extension either but here's the thing: I am making a project for myself, a Java (not JavaScript!!!) program that can add, change … |
 | Is it possible to remove an Icon or ImageIcon once it is set to a JButton or JLabel? When a specific action in my program has taken place, the picture in no more appropriate and I want to remove it from a JLabel. |
| | **This program is supposed to read data in from a file into an array list and everything compiles correctly so far but when i go to run the applet ProcessNovels it shows a blank window saying "Start: applet not initialized? Im not sure where the problem actually is i am … |
| | Hallo, I have a Java book from before Oracle took over Sun. In the chapter about pictures for buttons etc., the writer suggest to download a free to use icon set from java.sun.com/developer/techDocs/hi/repository Ofcourse this place does not exits anymore and the Oracle site is not clear to me where … |
| | String query = "create table emails " + "(ID int, " + "To varchar(20), " + "From varchar(20), " + "Message varchar(50))"; this java statment looks right. but getting a syntax error. |
| | i already have xammp set up on localhost. and i also added a "mysql-connector-java-5.1.22-bin" file to m exlipse under "JRE SYSTEM LIBRARY" information on xammp: user name: "root" password: "" database: "a_upload" table: "user" in eclipse iam just testing my connection. but i get a error: SQLException: No suitable driver … |
 | This is a continuation of the last thread. I insert 3 files: Two bins (path and a number) and either a jpg or a bmp This does the following. 1: Connects to FTP and changes to C:/ (/) 2: It checks if a webfolder exists. If it is, goes to … |
| | So let's take "banana", what happens when the program gets to if (ch <= 'd')? My understanding is the 'b' is < 'd' so it moves to the else. Am I wrong or right? If I'm right, then what happens at return 1 + g(s, index + 1); public class … |
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