36,051 Topics
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| | First question, is there any difference between binary search and recursive binary search??? I looked through google and everything but couldnt find any useful info. I did find irritative and recursive but that was it. and second question: Given a desired search value of 98 and an array with the …  |
 | Hi everyone this is my first code snippet so be gentle.. I have written a basic client/server chat program that uses multithreading for listening and sending. I welcome any improvements or discussion... Thanks James |
| | public class Vegetable { private int calories; public Fruit (int calories){ this.calories = calories; } } public class Onion extends Vegetable { private String color; public Onion (int calories, String color) { super(calories); color = color; } } Why doesn’t Onion constructor method properly set the color? A. The Vegetable … |
| | Once i press scan button,i enter info into the fields and after pressing the add info goes to the set.Once i press display all i can see info in JPaneShowMessageDialog ,so all scanned info after added pressed. But how to display info in the same textfields , by pressing the …  |
| | I'm looking to get back in to help desk support and have been out of the loop for five years. Is there some place out there that I can find a community to help me get back in the swing of things? TIA  |
 | Hello I try to learn the String.charCodeAt(index) method Here is a snippet that demonstrate that the first index is allways 48 independentely of the character. How work's it (I was expecting that each letter has her unicode-number equivalent. function unicoding(str) { for (i = 0; i < str.length; i ++) …  |
 | i want link of plugin for web development for netbeans IDE 8.0.2 so that i can download it.  |
| | This is the program in java which is an interface to stanford postagger. I have attached a copy of it. I am using netbeans 6.7.1 . I have placed the model file which is "left3words-wsj-0-18.tagger" in the bin folder of jdk and also placed the stanford-postagger.jar in that folder. I … |
| | Hello, I am trying to build a basic unit framework. I have got this method in a class called KUnit3 public static void checkEquals(double value1,double value2) { if(value1 == value2) { addToReport(String.format(" %f == %f", value1, value2)); passedChecks++; } else { addToReport(String.format("* %f == %f", value1, value2)); failedChecks++; } } …  |
| | I am trying to write a generic class with at type parameter T, and add a method that takes an ArrayList of type T and returns a standard deviation as type double. My program is compiling with no errors, however the standard deviation is incorrect. It is outputting the standard … |
| | I am trying to make a Java program that uses a tree to collect folder and file information about a directory and display it to the user. Essentially a java version of the tree DOS command. The user inputs a path to a folder and the command window will spit … |
| | So, my teacher gave me this assignment to write a program to enter a four digit number Andries each digit of the number in a separate line. For example, if a user inputs 1234, the output should be: 1 2 3 4 I'm stuck. Please help ASAP. We have learnt …  |
| | hiya all i am doing a program here on switch case, have a fair idea on switch case but the lecturer now decides to teach us it the program goes like this. have to find the retail price, commission and enter the employee id num but i having some problems …  |
| | this all (especially j) but anyone can make their input it is me again, me and my games and them, i am currently trying to build this game but this one is a counting numbers game. am sure you all must have come across it at some point time. i … |
| | I have in my program an object of a class. When I try to print it out I am getting "Address@33909752" - guessing it is a hash code. I also tried to override toString method, but still didnt help Address address = new Address(city, country, houseNo, street, postCode); Is there … |
| | I am having trouble getting value from getter. I am trying to access the getter method from another class but it returns null. In my Registration Class I have a constructor and getters. In my Client Class I have set the values using Scanner. I would like to create Report … |
| | I have a jbutton ,which once clicked ,counts the clicks: int clicked ; private void jButtonScanActionPerformed(java.awt.event.ActionEvent evt) { clicked++; } My question is how to attach this click output(once the button is clicked ) to jtext field to see the click count? private void jTextFieldParcelIDActionPerformed(java.awt.event.ActionEvent evt) { } |
 | Hi guys, I'm now looking at what seems to be a nice exercise on my java book. Basically, the exercise asks me to build a virtual keyboard GUI - see screenshot - and when you press each key on your real keyboard the key you've pressed will change its background … |
| | I am trying to create a method entitled rolledOneOnlyOnce that takes in two integers as parameters and returns a Boolean. This method must be public and static. In this method, the integer parameters represent the values currently on each of the Game’s die (die1,die2 respectively). Here, you will want to … |
| | Minimal Submitted Files You are required, but not limited, to turn in the following source files: Assignment8.java(More code need to be added) Food.java (given by the instructor, it needs to be modified for this assignment) IdComparator.java (Need to be completed) CategAndNameComparator.java (Need to be completed) Sorts.java (Need to be completed) … |
 | pls i need help in creating a traffic control system .for my project  |
 | I was wondering if it would be more efficient to render a single BufferedImage instead of rendering a bunch of BufferedImages in a double for loop? I have an idea of how to do it, I just don't know what methods in BufferedImage you would use to create the bigger … |
| | I am trying to assign a method to a varibale called from a constructor, but it returns null when I am calling it. public class ProjectManager { Calculation a = new Calculation(); private Scanner in = new Scanner(System.in); private Scanner price = new Scanner(System.in); private Scanner duration = new Scanner(System.in); … |
| | hi all (james) i have another question: if yuh want to use the random numbers, it goes like dis: random generator = new random() or it have the math.random right my questions are how do u get to generate the 2, 3, 4- times table, |
| | public class NaveenSingleton { private String name; private String [] names; private static NaveenSingleton uniqueInstance; private NaveenSingleton() { } public static NaveenSingleton getInstance() { if(uniqueInstance == null) { uniqueInstance = new NaveenSingleton(); } return uniqueInstance; } public void setName(String n) { name = n; //Search for duplicate name here, before … |
| | Hello there, In my program I have an object of a class with some values, and I am trying to create another object, populate it to array and add it to my object. class AdvertisementType { public String getWebAdvert() { return webAdvert; } public String getEmailAdvert() { return emailAdvert; } … |
 | Hello everyone! I am writing a GA, and I am trying to implement elitism. My problem is an interesting one. I cannot release too much code because it is an ongoing assignment. I have asked the TA, and he is unable to find the solution as of this moment. The … |
| | How can I learn GUI java? I've been having some problems with places to learn. Can anybody reccomend a source? |
| | I'm used to using AWT's Canvas and BufferedImage and things like that. I've switched from using Canvas for drawing, to using a JPanel and I'm blown away by the efficiency. I intend on fully using Swing for all of my GUI. My question is, what is Swing's equivalent of BufferedImage? |
| | Hello. My question is very basic but I can not find/understand the answer anywhere. How check if the name-value "name": value in an object. I know that with Object.keys() method we can checking the names of the properties. I know too that with Object.name or Object["name"] we can see the … |
| | I have done a socket programming using bonecp as the database pooling for mysql. Suddenly I notice a lot of socket connection made but then after a few hours I got too many open files. I have set the timeout but somehow it did not timeout I don't know why. … |
| | We have homework due tomorrow, and it's a three person group. I don't understand the slightest bit about arrays, but I've been trying - now the code just looks messy. Just with the things that say ------------------Tierra------------------, can you all help me? The book is useless and I'm just frustrated … |
| | Hi guys, with event handlings it seems that there are 2 approaches: 1)using an anonymous inner class 2)using a normal inner class. From what I can see if you have more than one component that is generating an event, say you have 3 buttons, if you go down the route … |
| | Hello, I am having a problem with my application. I have designed a class - DisplayClientRequest which has a constructor and some setters and getter. Apart from this i built very simple JavaFX GUI application. For instance if I create a method in my DisplayClientRequest with paramteres, how would I … |
| | Hello. My question is very basic but I can not find/understand the answer anywhere. How check if the name-value "name": value in an object. I know that with Object.keys() method we can checking the names of the properties. I know too that with Object.name or Object["name"] we can see the … |
| | Hello I have a rest web service which implement oauth2.0 . Now I have my web application with a login which currently using spring security. I want to use the same login to authenticate with the rest web service using oauth2. My question is: Does this tutorial is suitable for … |
 | Hi, I was having problems with the pet store java code. The class pet has private attributes, but i cannot use the extender class. Can help me? import java.util.*; public class Pet { // Private fields private String species; // Species name private int ageInWeeks; // Pet's age in weeks … |
| | HI guys, as I'm gettng into Java GUI again after a long time, I'm trying hard to remember things, but not everything is that clear anymore. I'm in the process of building a very simple GUI application with a few buttons. First question is about the JFrame and JPanel. From … |
| | Hello, I need help with android programming. The problem is that I can't make this portion of my codes to work the way I want to. I want to simply: - Delete a record inside the SQL lite database - Delete the record also inside the AlertDialog Single Choice Item … |
| | Help me :) I want to display the text file in JTextArea but how ? and i want to attach this is searching button. |
| | Does android support other language than java?  |
| | Hello all, I am trying to implement memento design pattern in my project to add and remove products from cart. I have abstract product class and sub classes like Book, Software, Phones etc.. I googled and found some examples using three classes : 1) Memento 2) Originator 3) Caretaker I … |
| | I am trying to get an object to move along a sin path in JavaFX. I found a few ways of generating the sin graph, but each of these used extra features and just ended up creating a window separate from the one the ball object generates in. I thought …  |
 | I'm wanting to make a voice controlled program, But when I type: 'import javax.speech' into NetBeans it says that 'javax.speech' doesn't exist. I then downloaded Free TTS, copied the speech.properties like I was supposed to. It still is showing the error. I did some more research and found a place … |
 | Hi. I have a MVC project with a form and a submit button. The values are passed to the controller. One method will fetch data from the dataset according to the parameters passed. Then some VB functions will work with the data retrieved. Currently I have the whole dataset being …  |
| | Hi, Im new to Java so Im trying out some excersises. The question asks to input IC number then get the digits for birthdate then display the complete birthdate. The output of this IC number : 900208-08-5386 ,should be something like this : 08 February 1990. I probably have to … |
 | I am trying to build a web application that can also run on mobile phones. Is the html code generated by imgmap_desktop can be run on both web and mobile? or rather web responsive type? |
| | Hello. I want to submit a code stuff with an explanation. It is not a valid code. Someone can help me to find error? <code> ** ** I'm trying to build a program that change numbers writen in decimal notation. If we consider each ranges of numbers: unities, 10-es, 100-es … |
 | I have deployed an application in wildfly localhost server through jboss but the application is failing to deploy. when I delete the web.xml page the app deploys but shows error 404. what might be the problem?? |
| | I know you're not supposed to use Lightweight Components like JFrame with non-Lightweight Components like JFrame, so my question is, what do you use with a Canvas? Is there also some example code for it? Thanks! |
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