36,051 Topics
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 | I have a problem with creating UML diagrams. This is the first time. Here is the question below:  And here is my answer:  Please check if there is anything wrong.  |
| | hello everyone. i have been attempting to make an if statement that calculates overtime hours for quite some time now and i cant seem to get it to work correctly. Is it possible to make this statement with 1 line? or am i missing somthing? this is what i thought … |
| | I need code in java for creating b+ tree whose nodes contain file for implementing insertion,deletion and searching. please help me out |
| | I want to make a pothole detection app for my final year degree project. Can i get the code from somewhere?? |
| | I have two jPanel one contain three textField and the 2nd JPanel have doThis when I click the doButton the data grom the textField should be displaied I tired this but it didn't worked I made the three textField public static and then from the 2nd JPanle I did this … |
| | I am trying to havea program give me the averages from the tests. If the number is over 100 it is to give me an excpetion code this is what i have thus far... having issues on line 36-38 and 40. any help would greatly appreciated. import java.lang.IllegalArgumentException; //declare and …  |
| | Hi! I'd like to create a simple table game by Swing. I have a JFrame and a JPanel variable. I want to add JButtons to this JPanel, but I'd like to create an own class. I made a class that extends JButton (inheritence): public class GameField extends JButton {...} So …  |
| | I am writing a java webservice which has two functions. One has to receive and save two string data and the other has to provide these two data.Suggest me what is the best to achieve this without using a db. I tried the below solution: I had a excel sheet … |
| | Heya all, I'm working on a small 'file browser', where the list of files is printed in a console (for now), but where the user inserts the file's path in a GUI. My gui is rather simple: one frame and one panel containing a JTextField and a JButton. I want … |
 | Ran across a blind spot in trying to figure this out. I want to pad a string with n characters to the left (at the beginning) of the String. This is the code I have come up with padRight and padLeft but when I go run the program it doesn't … |
 | I've noticed when watching videos, usually people import everything. Such as `import javax.swing.*;`. So my question is, is it better to Import everything? Or only the things you need indiviually? I've heard it slows down your program if you import alot of things, is this true?  |
| | Hello, I am working on a project in Wireless sensor networks. I need to simulation output in Javis using JNS. This is done by creating a trace file in java under JNS then running it on JAVIS...but the thing is I am having the JNS folder downloaded from which i … |
| | Hello, I am working on a project in Wireless sensor networks. I need simulation output in Javis using JNS. This is done by creating a trace file in java under JNS then running it on JAVIS...but the thing is I am having the JNS folder downloaded from which i extracted … |
| | Hi Team, This is my first Spring Code . I just followed the code provided in the book and tried to run the class , but it throws the below error. Please throw light on it. package spring.hello; import org.springframework.beans.factory.BeanFactory; import org.springframework.beans.factory.xml.XmlBeanFactory; import org.springframework.core.io.FileSystemResource; public class Main{ public static void … |
| | Hi guys, I need to create a web application in my job using Java, so i started using Netbeans 7.4, and started a new project. Im trying to develop a web application that will be hosted in a server, so i selected Web Application from the Java Web folder. Is … |
| | Hi All, I have just completed studying Core Java and started to learn Spring Framework. I think its a silly question but still Im confused about this. Can i build a Dyanamic webpage / website using Spring Framework ? |
| | i have intalled jdk 7 update 51 and netbeans 7.0 .for the first time it works fine but later IDE netbeans does not start at all and dialogue box comes that JVM creation failed...kindly help |
| | Hello Everyone. My application is installed on tomcat it works fine, but after 48 hours it give error below. if we restart the server everything works fine again Can anybody tell me what's wrong here with the bottom error? Thanks a lot........... [code] HTTP Status 500 - type Exception report … |
| | How to call server code from javascript code in asp.net using C#  |
 | if (cmd[0].equals("sz")) { if (player.isLocked() || player.getControlerManager().getControler() != null) { player.getPackets().sendGameMessage("You cannot tele anywhere from here."); return true;} { player.setNextWorldTile(new WorldTile(2667, 10396, 0)); return true;} } } } my error is closing the file. thats my problem i always get the error when i try to end the statement and … |
| | Hello, Thank you for the time! a) I have a Ball Object which implements the Runnable interface and traces the various positions of a ball. b) I then have a Ball_Bounce JPanel inside a JFrame which creates two instances of the Ball object and then paints them to the JPanel. … |
| | I would like to know what means Java Web UI with html5 knowledge,flex,javascript,css? Do you have to use plain jsp jsf servlet and then use a MVC pattern? If so the views are made with html5 flex? If anyone knows more about this please explain it to me because I … |
| | To integrate our data base with other site, I've got a xml coding (given below) but they require a JSP output steps and tips to achive that would be appriciated. TIA. <?php include('db_connect.php');?> <?php $query=mysql_query("select * from tbl_seat")or die(mysql_error()); $xml="<libraray>\n\t\t"; while($data=mysql_fetch_array($query)) { $xml .= "<From>".$data['fromloc']."</From>\n\t\t"; $xml .= "<To>".$data['toloc']."</To>\n\t\t"; $xml .= … |
 | i want to change the colour of output text field when i check the check box. its working fine if instead of output i use inputext field but not working with out put text field. this is the code snipt of jsp page <af:panelFormLayout id="pfl3"> <af:selectBooleanCheckbox label="Noun " id="sbc1" selected="true"/> …  |
 | If anyone needs any help with the projects in the BluePelicanJava book. I am available to help with coding issues. |
| | I have figured out how to do this. All that is needed is the .useDelimeter error. help? `import java.io.*;` `import java.util.*;` `public class AddEmUp `{` `public static void main(String args[]) `{` `Scanner sc = new Scanner(System.in); `System.out.print("Enter something like 8 + 33 + 1,345 - 137 : "); `String s … |
| | So I'm trying to figure out why my get method doesn't pass its test. This is my attempt at the get method: public Value get(Object key) { //Returns the value to which the specified key is mapped, or null if this map contains no mapping for the key. for (Pair<Key,Value> … |
| | could anyone please tell me what's the difference between getApplicationContext() and MyActivity.this.."MyActivity" being a class that extends Activity class..somethimes getApplicationContext() doesn't work and I need to use MyActivity.this when the constructur asks for a context... for example, if i use `ProgressDialog p=new ProgressDialog(getApplicationContext());` it gives an error however, if i … |
| | Dear All, In Java Swing, for all components there is a setSize method which takes int height and width as arguments. And we will pass parameters like 600,500 & 400,300 etc... My doubt is what is the unit of these height and width . I mean on what unit, the … |
| | I've created new JPanel from Swing GUI form called myNewPanel and I have one button in my JFrame it called btnClickMe when the button is clicked I want the panel in the Jframe to be removed and replaced by myNewPanel I've tried my code but it not working for me … |
| | Hi I just started learning on making gui on Java. I watched some youtube videos and i realise one of the them uses DefaultTableModel. At first i thought it was to allow access to the function of the table but i realise i can directly write and get value from … |
| | I having major issues trying to make a GUI for this program. How do I connect my program to my GUI? I don't get it?Can someone help me with this? I also can't get result to read on my GUI.  /* * To change this license header, choose … |
| | Hi, I have been trying to get my program to run for a few days now. I have gotten it almost completed I think, but keep getting "error: variable checkFee might not have been initialized" on line 37. import java.util.Scanner; // scanner class public class PROB3_CHAL15 { public static void …  |
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| | I'm trying to connect mysql database through API, and I'm using the following coding. I could't get the proper access to the database. Do I need to create a JDBC to the database or is there any other options available? <%@page import="java.sql.DriverManager"%> <%@page import="java.sql.ResultSet"%> <%@page import="java.sql.Statement"%> <%@page import="java.sql.Connection"%> <% String … |
| | I'm packaging my java program as a jar..it includes mysql-connector.jar..it runs fine when i run it in eclipse..now i need to distriute the jar file..I packaged the jar file and when I run it through command line using java -jar myprogram.jar, it throws ClassNotFoundException: com.mysql.jdbc.Driver could anyone please tell me … |
 | Hello, I need to build the following GUI  and as usual I was hoping to have some advice before I start building it. In particular, I wonder if you guys think I should have any JPanel at all or if it is better to attach everything to the … |
| | Hello. I want to be able to create a listener for a cell in my JTable. Whenever write a number in a JTable (every key release) I want the value on the other column to decrease something like this: Quantity|Borrow 10 | 0 8 | 2 i use window builder … |
| | So I just finished up a way to solve Standard Form Quadratic Equations, Now I want to code a way to automatically Convert a given Standard Form equation to Vertex Form, or Vertex to Standard. Is it possible due to the fact that you have to get a perfect square … |
 | Hello good afternoon. I have successfully serialized data in the past, however it seems as if I don;t fully understand the process. I have a class called ProgramState which stores a variable (called lastCreated) with custom class LinesProject and an ArrayList variable(called recentProjects) of this custom class. The purpose of … |
| | Needing some help with a small problem. I have this program that is not compiling correctly. The instructions are simple which are: The PairTest should prompt the user for the two values, create a Pair object with the values and then print the average, distance, maximum, and minimum of the … |
| | How do i post my codes on here? I did it once by accident and don't remember how i did it. |
| | This is just a simple program that acts as a calculator for school age children. My professor requested that I add a declarations section. If possible could someone help me which parts of my code I need to add. |
| | I am a #rd yr. B.Tech student & want to do projects on C & Linux Shell Programming.It will be of great help if I can be supplied with some project titles for freshers with industry relevence. Thanking you, Supra |
 | import java.util.*; public class n00883428 { public static void main(String[] args) { Scanner in = new Scanner(System.in); { int i; int j; int numPeople; int numCount; int upTo = 0; long memory; long startTime; long endTime; System.out.print("How many people are in the circle?"); numPeople = in.nextInt(); System.out.print("Enter number to count … |
| | Hello, new to Java and I've been doing some coding for a few weeks. Right now I am stumped. I've been trying to make a program that would display how many days are in the month when the user inputs a month number, but it keeps saying that DaysInMonth.java:64: error: … |
| | Hi Team, I have two java Files 1. Print (Package A) 2. Apple (Package B.C) (Jave file is inside C:\Z\A\B\C\ I have compiled and kept Print.class file inside C:\Z\A\B\A\ Now i have made a Jar file of Print.class named MyJar.jar and kept it in Z\A\ When i try to compile … |
| | I'm not sure how to normalize the values to get the output that I want. I created a method called normalize. The values come from my txt file. The output I want is - Quizzes: 66% Labs: 88% Lab attendance: 81% Midterms: 91% import java.io.*; import java.util.*; public class FindGrade … |
| | Hi Team, I am almost going to finish learning core Java and my employers said openings are available for Hibernate/Spring/Struts. I am just wondering whether can i directly start studying one of these frameworks after Core Java. Some people said these Frameworks contains JSP,servlets and important J2EE concepts so that … |
| | I am trying to finsih this coding and something is missing and teacher has asked me to init the doubles. I am struggling with the finishing touches of this program. import java.awt.*; import java.awt.event.*; import javax.swing.*; /** * The MenuWindow class demonstrates a menu system. */ public class CellPhonePackage extends … |
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