35,619 Topics
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| | I have a variable that contains the name of another variable. I intend to read the contents of the variable name. how? |
| | hello can you help me when i click the add button it will not add to the database.it will generate an error..can you help me please hoping for your positive responds...here's my code,please see my attachment.... [CODE] import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.event.*; import javax.swing.JPanel.*; import java.sql.*; public … |
| | rectangle r1=new rectangle(); rectangle r2=r1; whats the working of second line here |
| | a print procedure is a good candidate for a dynamically bound method. why? |
| | I have three classes in the program. This is a part of my assignment. I am doing it for the first time; so you might find something stupid in there.. as i have just tried to get the output my way or based on the assignment requirements. I have one … |
| | i hv written code of seraching specific folder on user choice with threading implemented. but im getting nullpointer exception at l.statsWith() in thread class two and not with normal searching [CODE]public class onlyfolder { static String z,l,w,e; static String y; static File f; static JFrame frame; static JPanel panel; static … |
| | Hey guys. I have a tic tac toe game that plots random X's and O's on a 2d matrix array called theBoard[row][col]. I want to check to see if one X is placed on 1 spot, and if another point is plotted in the same spot, to check if it … |
 | I'm pretty lost on this. I have no idea how to get my program to work. Basically, when an option is selected a price should show up in the text box automatically. Thank you all for your help. Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: javax.swing.JComboBox cannot be cast to javax.swing.JTextField at … |
| | Morning People I seem to be having a pretty big issue with a buffer I have that is reading a text file and acting upon the results of the file, As of now, the buffer reads each token in the file, and stores each token into a variable, this is … |
| | I have to create a program that makes a lottery like game. My teacher wants me to use the constructor to initialize all the fields but I can't seem to get it to do that. Everytime I put the fields in the constructor initialized, I get compile errors. So right … |
| | Hello! I am having a bit of difficulty calling a function in my class Image. The point of the class is to generate a 2D array of Color instances, then do various things with it. Within my test code, my editor simply will not allow me to call any methods … |
| | I have: [CODE]JButton b1 = new JButton(); b1.setForeground(Color.BLUE); the button labelled b1 turns blue and all is working, However is it possible to use some function like: String ButtonColor = "BLUE"; b1.setForeground(Color.(ButtonColor.getText()));[/CODE] I ask this because i want to get the colour from a different class.. Any help appreciated thanks!  |
| | I am writing here, asking you for a little help. I have assignment in Java for my class in programming. I should create Java Applet and make animation. The animation should consist of several bouncing figures (balls, triangles, squares etc.) and when clicking on them different events should happen. One …  |
| | The group has now been divided, my problem scenario is the following: There are 2 packing machines, which can pack any type of food, however this needs to be done one at a time. Each food type takes 10 secs to pack. The packing machines get the food from the … |
 | Hi I have a problem with my first program using JSP and am hoping that someone could help me? In my servlet I am using a vector to create my JavaBeans and insert the values from my database: [CODE] rs = stmt.executeQuery(); Vector collection = new Vector(); while (rs.next()) { … |
| | Hi I am new to java and I am stuck on an assignemnt and im looking for some suggestions basically i have 8 buttons delcared as an array and i would like to double a number enetered in a textfield when clicking a certian button ..... i want each button …  |
| | Need Help Solving this problem... How do I start my for loop to display the 7 district aestricks  |
| | The group button in my form is set to "unack". The Spring HwController receive the correct group "unack" when the "apply" button is clicked. However, the HwController receive the null group when the cursor is moved to the text box and press the <Enter> key. Only the data from the … |
| | Hi just wondering could anyone help me with this tic tac toe game i am developing it must be a GUI and include AI for the computer i originally made this tic tac toe game without the GUI but i am just having problems converting it to a GUI as … |
| | Hello guys......Cindy here I am trying to get my program working and I am getting really frustrated. I am writing this program to familiarise myself with arrays, methods & loops so i can improve my Java skills. Im not lazy guys and have tried searching yahoo ,answers, forums and google …  |
| | Can someone help me with this please. [CODE]import java.util.Scanner; import java.text.NumberFormat; public class ChargeAccount { private int additional_charges; public int balance; private double min_payment; private int interest; private double new_balance; //initialise Charge Account public ChargeAccount(int previous_balance, int add_charges); { balance = previous_balance; additional_charges = add_charges; Scanner scan = new Scanner … |
| | Hi Guys, I've noted that when using Netbeans, .jar file is created when you build your application. if i want executable jar file of my application, can i just take the same generated jar file, or should i create my own .jar via the command prompt. I mean whats the … |
| | I am new to this place and have a lot of questions to discuss with all here. Starting with a problem that i am currently stuck in..:) I have a small project for which i am using net beans and want to generate the graph as I am having values … |
| | i had stuck with this question cz i'm newbie for java programming. i hope ur helping... The Vote class has the data field count to count votes, and the methods [I]getCount(), setCount(), clear(), increment(), and decrement()[/I] for reading and handling the votes, as shown in class diagram below. The [I]increment … |
| | [CODE]void age() { boolean isValid = false; Calendar user = null; while (!isValid) { System.out.print("Enter Date (mm/dd/yyyy): "); DateFormat df = new SimpleDateFormat("MM/dd/yy"); String s = In.in(); Date date = null; try { date = df.parse(s); } catch (ParseException e) { System.out.println("Date error"); } user = Calendar.getInstance(); user.setTime(date); if (user.getTime().getTime() … |
| | I'm desperately trying to do some coursework and its not going well. I've been searching for example code for registering a new user to a database. I have a database connection and data access servlets but its riddled with errors. Its building but throwing up apache errors of all types. … |
| | I have to work on a method called extract feature which has to check for the pattern i pass to the method in the matrix I pass This is an example pattern = {{0,100,0},{255,255,255},{0,100,0}}; Though I pass any different pattern it has to check for that pattern in the matrix … |
| | Hello, i'm new to java and i need to read a file of strings into an array and then sort them but i can't figure out how to do either. i can do it with ints and doubles but i can't with strings. if anyone could help me i'd be … |
| | Hello Experts pls i want get all the form data for id card along with the passport image when correct id corresponding to the database row is inputed. the code only retrieves other form data but can't get the image. --------------recovery.jsp--------- [CODE=jsp]<HTML> <HEAD> <TITLE>Database Lookup</TITLE> </HEAD> <BODY> <FORM ACTION="recover1.jsp" METHOD="POST"><fieldset><legend> … |
| | [CODE]import java.io.*; import java.util.*; import java.io.FileWriter; import java.io.IOException; public class Dirtrav { public static void main(String args[]) { // String rootDir="C:\\Projects\\PerfBVT'\\W6_TopicVsQueue_8.2.0.0.74_040110\\"; File directory = new File("C:\\Projects\\PerfBVT'\\W6_TopicVsQueue_8.2.0.0.74_040110"); identifydir(directory); } //File directory = new File("C:\\Projects\\PerfBVT'\\W6_TopicVsQueue_8.2.0.0.74_040110\\"); public static void identifydir(File di) { File[] files = di.listFiles(); if (! di.exists()) { System.out.println("Invalid path"); return; … |
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