35,619 Topics
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| | Hi, I have an application with one JFrame and two modeless JDialogs. When I mimimize the JFrame, the dialogs are still there, not minimized. So i need to hide them. I can hide them with WindowDeactivated event which runs one time when the JFrame is minimized but when I want …  |
| | Hello guys! Sorry newbie here. I get an error in Netbeans while trying to add an Icon to a J label. The error is: Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException: Cannot invoke "java.net.URL.toExternalForm()" because "location" is null After importing all of the images I used for my project. I still get … |
 | Hi to All! I have a POS Software which I have developed in Java, NetBeans IDE. I am deploying this software on a variety of Windows Computers / Laptops for 5 years. I have used JFormattedTextFields for double data type in the whole Software. And I have set Format of … |
 | How do I track the source of each user signup for B2B SaaS product? In other words, how do I check from which source the user landed on my website? I need to track for each individual user. |
| | I developed a Java Application to run on Mac BigSur. I used Java Derby as database for this application. The Application gives an Exception: java.lang.ClassNotFoundException:org.apache.derby.jdbc.EmbeddedDriver The interesting fact is that When I run this application on my MacBigSur(Which I have installed on Virtual Box) then the application runs perfectly. But … |
| | I need help with a java project as soon as possible. Please help if absolutely necessary. Please, please   |
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 | I am really thankful to become a member of this community. I am a developer, learning new programming languages to push my professional growth. I have 2 years of experience as a Java developer. Now I am learning new technologies like Python and Ruby on Rails. I will help community …  |
| | I am not quite sure why I am getting this error package tile; import java.awt.Graphics2D; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import javax.imageio.ImageIO; import main.GamePanel; import main.UtilityTool; public class TileManager { GamePanel gp; public Tile[] tile; public int mapTileNum[][]; public TileManager(GamePanel gp) { this.gp = gp; tile = … |
 | Create three classes the Calculation class, Conversion class and Menu Class. The Conversion class should have the following methods. double KMToMiles(double distance) double MilesToKM(double distance) double FeetToMetres(double distance) double MetresToFeet(double distance) double KgToPounds(double weight) double PoundsToKg(double weight) double CelciusToFahrenheit(double temperature) double FahrenheightToCelcius(double temperature) The Calculation class should have the following … |
| | Create three classes the Calculation class, Conversion class and Menu Class. The Conversion class should have the following methods. double KMToMiles(double distance) double MilesToKM(double distance) double FeetToMetres(double distance) double MetresToFeet(double distance) double KgToPounds(double weight) double PoundsToKg(double weight) double CelciusToFahrenheit(double temperature) double FahrenheightToCelcius(double temperature) The Calculation class should have the following … |
| | I'm working on a class project where I am supposed to determine how long it will take for someone to be fully vested in their pension. I have to take the time they started working as a string mm/yyyy and then calculate the date they will be fully vested. The …  |
| | Hi ! I have developed a Java application using Derby Database. The application jar file is successfully running on Windows but on Mac it gives and exception as following: ClassNotFoundException: org.apache.derby.jdbc.EmbeddedDriver I am pasting code for database Connection which I wrote. String dbdriver = "org.apache.derby.jdbc.EmbeddedDriver"; Class.forName(dbdriver).newInstance(); con = DriverManager.getConnection("jdbc:derby:C:\\4DSOFTECHDB; create … |
 | Grading Sheet With Passed and Failed Using If Else Statement FOLLOWING INPUT: FOR REMARKS: -FULLNAME -75 UPTO 100(PASSED) -SECTION -74 DOWN TO 65(FAILED) -SUBJECT DESCRIPTION -OTHER GRADES(INVALID GRADE EX.105) -SUBJECT CODE -1ST MONTHLY EXAM -1ST PRELIM EXAM -2ND PRELIM EXAM -MIDTERM -PRE-FINALS -FINALS  |
 | I am on the latest version of Windows 10, running with SWI-Prolog 7.6.4, and trying to get JPL (Java <->Prolog) running for a school project. I've not had to deal with path issues much but I have done my best to understand the problem. I've added the necessary import statements … |
| | Pseudocode that read elements of array in column wise arrangement |
| | How would you write this into pseudo code #include<cstdio> #include<cstdlib> #include<iostream> using namespace std; int main(int nNumberofArgs, char* pszArgs[]) //variables string var, var1; float cm, mile, kilometer, inch, meter, AU, fahrenheit, celsius, foot, quit, i; //program i = 1; while (i <= 1000000000) cout << "Enter the starting unit. For … |
| | Hello there, I am trying to calculate the shot, the value, and the score in my Archery Target Program. But I have no such luck. Would anyone be able to help me? |
| | Jackson does not provide a tool for generating Jackson classes from XSD or JSON, as JAXB does for a specific XSD. The JAXB class generator was used to generate a set of classes for the specified XSD schema. For polymorphic types, for example, JAXB provides the following annotation to identify … |
 | Give me suggestions are welcome  |
| | This questions contains probability and I dont know how to work with it in Java import numpy import random def cup_game(): cashprice = [0.5, 1.0 , 2.0 , 5.0] n_turn = numpy.random.randint(5,11) n_mult = numpy.random.randint(3,6) cups = list(range(0,15)) x = numpy.random.choice(cashprice, 15, p=[0.3, 0.4, 0.2, 0.1]) x = list(x) turn … |
| | and was trying to find a way to make bubble sorting short as it is wayyy to long? so can anyone show me a code to do that? |
| | Hi, I am new to Java but familiar with python, I need to convert my code from python to Java can anyone help me? Much appreciated! import random suits = ['C', 'S', 'H', 'D'] val = list(range(1,14)) class Card: def __init__(self, suits, val): self.suit = suits self.value = val def … |
| | hello, I am currently struggling so bad in understanding Java and how to implement the codes. I have to implement two subclasses for Canadian and US postal code in Java. For Canadian Postal code, a valid postal postal code has the rule: positions at 0,2,5 are letters. Positions at 1,4,6 … |
| | **Introduction** You know that being effective is the key to success in any business domain. However, you may be wondering how to improve employee performance. In order to do this, it’s important to have tools at hand that will help you measure and track employee performance in real-time and act …  |
| | Hi. So I want to open a application from Java code and open a new terminal for that application also through Java code. We can open the new terminal manually by entering ctrl+alt+t. But I need to do this via code without entering any keys. Can anyone suggest something? |
 | Hello All, We have designed our system and integrate lots of opensource code into a single use system. All the inter connectivity are through APIs. Problem is, it's getting messy each day. We have been looking into Kong and Apigee. Anyone has experienced into situation like such? We have over … |
 | ## Introduction ## In the last tutorial, we learned [how to set up our own RabbitMQ exchanges and queues](https://www.daniweb.com/programming/web-development/tutorials/538620/how-to-create-exchanges-and-queues-in-rabbitmq-server). In this tutorial, we will learn how to send messages to our custom **daniweb-exchange**. ## Goals ## At the end of the tutorial, you would have learned: 1. How to send … |
| | I have a question about encryption. So I have a code sample that has a key size being chosen, something like 32 bits or something, and I am basically either filling the key size buffer with the password and then zeroes, or null bytes, or a word repeated over and …  |
| | HI GUYS I'M DEEPLY DESPERATE TO KNOW HOW TO CONVERT THE CODE FROM PHYTON TO JAVA, MY TASK IS DUE TOMORROW PLEASE HELP MEEEEE T_T |
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