32,204 Topics
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 | Hello there. I have a working method here, called rotateRight() that takes an array and shifts all the elements to the right, except the last one that is placed at the start I have debugged the method, and the method works fine. However the changes are not being reflected in … |
 | Hello Guys, I'm trying to learn how to use the GridBagLayout manager... but when I write it like the following: [B]JPanel panel = new JPanel(new GridBagLayout());[/B], Java tells me the following: [U]cannot find symbol symbol: constructor JPanel(gridbaglayout.GridBagLayout) location: class.javax.swing.JPanel.[/U] When this didn't work, I tried type casting [B]JPanel panel = … |
| | Hello All , i urgently need to know how to store Arabic data in database , when i create a DB create database system; create table customer( name varchar(100)); i can't store the name in Arabic what can i do..? thanks alot |
| | sir i have little bit confusion about multilevel&multiple inheritance and why doesn't support multiple inheritance |
| | Ok I have everything working for the most part. I think. Here is what I am trying to do. I am to allow the user to enter the name of an employee, hours worked over 5 days, and pay rate. I have done that. I am then supposed to generate … |
| | My code [code]public class BattleSystem { public static void main (String[] args) { String choice; System.out.print("What would you like to do? "); Scanner input = new Scanner(System.in); choice = input.nextLine(); System.out.println(choice); if(choice == "1"){ createChar g = new createChar(); g.charCreateHandler(); g.charStatsHandler(); g.closeFile(); } else{ System.out.println("More choices coming soon!"); } } … |
| | Hello, does anybody know a simple way to strip the leading zeros out of a string? I have tried [CODE]userName.replaceFirst("^0+(?!$)", "");[/CODE] but cant seem to make it work, any ideas? Thanks. correction, this work.. [CODE]userName = userName.replace("0", "");[/CODE]  |
 | In my program when i close the save file chooser it opens another one ??? heres the code [CODE] import javax.swing.*; import javax.swing.filechooser.FileNameExtensionFilter; import java.awt.*; import java.awt.event.*; import java.io.*; public class JB extends JPanel implements ActionListener{ protected JTextArea textArea; public JB() { setLayout(new BorderLayout()); JTextArea textArea = new JTextArea(); textArea.setFont(new … |
| | I am currently using eclipse but thinking of NetBeans because of gui. I don't want to download it yet because i dont want to have unused programs on my computer. so should i download it for gui? |
| | Can you help me on my OS project is the fixed partition project that can enter a job sizes and and its memory size. it is a gui type of project... that when I start now to run a message will come up that requested to have how many jobs … |
| | Hi, im fairly new to Java, learning as I go on. I have gotten to the stage that I need to read specific lines from a text file that has already been created. Lets say my text document has 30 lines, and I only want to read what is in … |
| | i need to access the current text of a JTextField from another method but i get an error here is the code [CODE]public Calc(){ JTextField textBox1, textBox2; setLayout(new FlowLayout()); textBox1 = new JTextField(" Time "); textBox2 = new JTextField(" Exp "); JLabel lRate = new JLabel("Rate"); JButton calc = new … |
| | Right now, with the manifest file, I am able to create my runnable jar to work with: folder structure: [CODE]libs/thirdpartylib1.jar libs/thirdpartylib2.jar myJar.jar[/CODE] using this manifest: [CODE]Class-Path: libs/thirdpartylib1.jar libs/thirdpartylib2.jar Main-Class: myPackage.myClass[/CODE] Is there any way I can package these jar files into my runnable jar so that I do not need … |
| | Hi all, i have been given an assignment asking me to: "The CashRegister class has an unfortunate limitation: It is closely tied to the coin system in the United States and Canada. Research the system used in most of Europe. Your goal is to produce a cash register that works … |
| | I tried to make a simple program, draw a 4 sided polygon with 4 mouse clicks. This is the code: [CODE]import acm.graphics.*; import acm.program.*; import java.awt.event.*; public class Pravougaonik extends GraphicsProgram { public void run() { addMouseListeners(); } public void mouseClicked(MouseEvent e) { GPolygon cetvorougao = new GPolygon(); cetvorougao.addVertex(e.getX(),e.getY()); cetvorougao.addVertex(e.getX(),e.getY()); … |
| | I wanted to know if its possible to change the text of a JTextArea or JTextPanel from another method and if so how? |
| | Hey guys! So I recently started exploring the InetAddress object, and came across 2 methods which confused me: [ICODE]getHostName()[/ICODE] and [ICODE]getCanonicalHostName()[/ICODE]. I don't fully understand the difference between a canonical host name (fqdn) and a general host name, so if someone could explain the distinction to me in detail that … |
| | Hello there, I'm trying on Gui exercises. One of them requires a simple GUI class for Vehicle. The GUI should have buttons for creating new SportsCar and new Van objects. and then should display the values of the instance variables of these variables. The GUI should also calculate and display … |
| | Hi Everybody, I want to send Free sms in java without using any modem please help me out,i have been doing this since one week. Any help will be deeply appreciated. Thanks in advance Arpita :) |
| | i have to make a screen output final with variable which will set the height of atree.a the while loop has to be used.im kinda stuck to figuring this all out. the tree has to look like this * *** ***** ******* ********* *** so far all i have is … |
| | I ran across this site while trying to Google search for help. I noticed this site showed up a lot of times and answered the questions I had, so I decided to join. I'm writing a program from class but I'm having some trouble. I would like to loop this … |
| | I'm very new to Java 4 1/2 weeks into my intro to java, I have to write a program that asks user for an integer, the program will then add up all integers from 1 to N and display output message the sum of integers from 1 through (integer input … |
| | I have been searching online for a program that will: -reads in number of times a user wants a coin flipped -flip the coin that many times, printing out result of each coin flip -print out the total number of heads flipped and total number of tails flipped the application … |
 | Here's an easy one for you experts :P What is casting and parsing? How exactly are they different? After explaining, could anyone possibly tell me how to cast/parse the various types from and to each other? (the types being: int, double, char and String) Also, in which situations would I … |
| | I'd like to load an audio clip and play it multiple times in response to a button press events. Application is a piano simulator, with 88 sampled .wav files bundled in a resource. Using JMF, I can easily load the audio file and play it once, it doesn't play the … |
| | I'm a newbie to Java, so I'm sorry if this is a silly question. I'll post the code first, then explain my problem. [CODE]import java.util.Scanner; class CharacterOperations{ public void run(){ System.out.println("1. toUpper"); System.out.println("2. toLower"); System.out.println("3. Alphabet"); System.out.println("4. Quit"); int input; Scanner sc = new Scanner(System.in); input = sc.nextInt(); while (input … |
 | I'm suppose to use Command-Line Arguments to take user input and than use an enhanced for loop to sum. [COLOR="Red"]This is the error: Exception in thread "main" java.lang.Error: Unresolved compilation problem: Type mismatch: cannot convert from double to int[/COLOR] [CODE] public class EnhanceForLoop { public static void main(String[] args) { … |
| | Hi I was looking help with a null pointer error I get everytime I use my newgame button or start the newgame method. What the game should do is guess 1-1000 then change the screen when the user's guess is too low , too high, and correct. Once the user … |
| | I am following a series of programming challenges for beginners, this challenge requires interactive commandline input which is a pain in java. Therefore I've made a small class in another file to handle the user input. When I try to compile the main class ('external' class compiles without problems) I … |
| | Hello DaniWeb, i`m a new member here, so greeting to you. As the topic title says i`m in bit of a problem, so a little help would be appreciated, I am as newbie as it get`s when talking about JAVA, so here it is. I`m trying to figuere out a … |
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