36,869 Topics
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 | **Is it true that a java website faces much more page speed and core web vitals issues as compared to a wordpress website? ** I have seen many wordpress websites doing nothing on technical seo issues but having very good page speed whereas my website is a java website and … |
 | Before ChatGPT or DeepSeek existed, successfully completing a coding task was a very fulfilling experience, even if it took a long time. Now that things can be done quickly, the sense of accomplishment feels diminished.  |
| | Since this is a discussion forum, I dare use it to announce a new release of the best (IMO) Java open source discussion software, JForum. There isn't much new in terms of functionality or bug fixes, but it now runs natively on JakartaEE 10 - meaning you need Tomcat 10.1 …  |
| | I used to be a long-time moderator and administrator on JavaRanch/CodeRanch, where I got to know Tim and Ron who recently introduced themselves here. Over there I was heavily involved in moving the Ranch from UBB to [JForum](https://sourceforge.net/projects/jforum2/); I'm a committer to the open source version to this day. The … |
| | Like Ron McLeod, [who we met yesterday](https://www.daniweb.com/community-center/say-hello/threads/543368/hi-everyone-i-m-ron-mcleod), I'm a moderator and administrator over at the CodeRanch.com forums. I'm a Software Engineer, currently working as a Software Architect for a medical technology company in Belfast, Northern Ireland. We use Java, JavaScript, TypeScript, Python, we have used many of the related tooling … |
| | I'm a moderator and forum software developer at CodeRanch. In my day job, I work in the telecom sector, working on core network and related solutions for mostly 4G and 5G cellular networks. I am currently spending a lot of time working with distributed microservice based solutions, often using a … |
| | What model of Android phone would you start with for testing a Java app? Is there one phone of which you can say, "Well, it works fine on here. There’s a good chance it’ll work on 75% of other Android phones and tablets"? |
| | 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 … |
| | My Java application crashes with a NullPointerException when trying to access an object property. Here's the problematic code: public class Test { public static void main(String[] args) { String text = null; System.out.println(text.length()); // NullPointerException here } } How can I properly handle this scenario? |
| | My name is Ray Brad. I am a learner in Salesforce development and administration, and I also have knowledge of Java concepts. If anyone has questions related to these topics, feel free to comment, and I will do my best to answer them. |
| | This project is a cross-platform Kafka GUI client. A star would be appreciated to support the open-source effort by the author. Thank you! # Features of Kafka-King * View the list of cluster nodes, dynamically configure broker and topic settings. * Support for consumer clients to consume messages from specified … |
| | I'm hosting a Minecraft server on a PC with 4GB RAM and an Intel Core i3, but it's lagging with 3+ players. How can I optimize it? Should I adjust Java arguments, tweak server.properties, or switch to PaperMC? Any tips to reduce mob/entity lag?  |
| | Hello everyone, I’m working on a project to develop an educational software aimed at teaching programming logic to beginners. The app will focus on short questions and mini-games to make learning engaging and interactive. It’s targeted at university students in their first semesters and will primarily use Java as the … |
| | i am using bluej and this code compiles but doesnt save the input and unique file extension to the same document. I am new so this may seem elementary but any help would be appreciated. thank you // File with a timestamp in the filename import java.io.IOException; import java.nio.file.Files; import …  |
| | I need opinions or advice on an application that I want to program in Java to learn programming logic through short questions. |
 | Recently I started to rewrite the core of a web app in Java (not including the Admin part). I have discussed ideas with colleagues and friends and one thing that seemed to be an agreement was that it is time to stop keeping the same image in two formats jpg … |
 | I have seen many people struggling with Reading files and writing files in java, also a great problem is how to edit a file too. So in this code snippet I have put all these problems into one small program in hopes to help others. So this code snippet will … |
 | Is there any method in java to generate random number (integer, byte or float) ? Please tell me if any i need it in my program. If possible please give full example. Thanks!  |
| | Hello, i've cleared my java certification exam and got the job interview. The interview will be held in the next month on 22 September 2024. I want to prepare for each every questions because i believe it would be the toughest round with BlackRock. This is my best call and …  |
 | Reflect on your experience with object-oriented programming (OOP) in Java. Discuss how concepts like inheritance, polymorphism, and abstraction have helped you in your projects. Share examples and personal insights. |
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| | Hello !! "I want to learn Java data structures and algorithms (DSA). I have recently learned Java object-oriented programming (OOP). Suggest me best tutorials for learning. |
 | Hello, I have simple problem for professionalist (that i think ) but i asked all available AI about it and none was able to help and solve problem. so nothing is able to help me in this. I have simple app that show 3 colored axes and camera that move … |
 | Hi everyone, I'm Karen and I'm a newbie who is learning java 😊 |
| | Hello, I have a program which creates multiple balls and bounces them off when they collide. This works fine. import java.awt.Rectangle; public class Ball{ private int x = 0; private int y = 0; private int radius; private int panelwidth = 500; private int panelheight = 500; private int xDx …  |
| | if i provide you with my project OOP java can you transform him for me to GUI |
 | I have not been active on the site for sometime now. That is because I ended my previous project and didn't have another ready to go. Now I do have a new project and that is Java so I will be around more often. |
| | Hello friends, I am stuck at a point in downloading multiple files as a single zip such that - the generated zip by my code for user download seems to be not a properly formed one. While trying to open the generated zip, I get an error as - "Cannot … |
| | Need help with JTable header group : Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: javax.swing.table.JTableHeader cannot be cast to id.co.aal.common.GroupableTableHeader this is the part of table drawing ..... if(tabledraw) { tabledraw=false; for (int k = 0; k < m_data.getColumnCount(); k++) { TableCellRenderer renderer; if (k==Kehadirantable.COL_ALOKASI) renderer = new CheckCellRenderer(); else { DefaultTableCellRenderer … |
 | Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException: Cannot invoke "java.net.URL.toExternalForm()" because "location" is null. The error is from this line of code: home.addItem(new ModelItem(ID++, "Original Nuggets Meal", "", 90, "KFC", new ImageIcon(getClass().getResource("icon/img2.png")))); i use the correct folder as it is in a package in the same source of the file. please help! |
| | Dear All, In my Application i am downloading a file. on button click using servlet. after clicking the button servlet called and download dialog box opens with open / save and cancel button. i want to trace these button events. on open or save i want to update status 'true' … |
| | I get the following exception Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException: Cannot invoke "java.net.URL.toExternalForm()" because "location" is null My code is java.net.URL auth = getClass().getResource("auth.jpg"); Icon auth1 = new ImageIcon(auth); java.net.URL alert = getClass().getResource("alert.jpg"); Icon alert1 = new ImageIcon(alert); java.net.URL insuf = getClass().getResource("insuf.jpg"); Icon insuf1 = new ImageIcon(insuf); java.net.URL inva = … |
| | Is it OK to have if statement in the constructor Thanks [CODE] public class CTime { private int start_hour; private int end_hour; private int start_minute; private int end_minute; public CTime(int h1,int m1,int h2,int m2){ if(h1>=7 && h2<17 && h2*60+m2>h1*60+m1){ setStartHour(h1); setStartMinute(m1); setEndHour(h2); setEndMinute(m2); } }[/CODE] |
| | If any of you have hands-on experience in developing texting platforms or have insights into the considerations involved, I would greatly appreciate your input. Factors such as real-time capabilities, scalability, integration with messaging protocols, and compatibility across devices are of utmost importance. |
| | Hello, I am a programmer, but I stopped a long time ago due to the situation in our country, and I want to work again. Please help me with some money to buy your brother’s laptop from Syria. |
| | Hi guys, what are the different types of java applications  |
| | Hey guys!~ the code below is generating this error message "Type mismatch: cannot convert from int to ResultSet" there is no integer types in the database i have made sure they are all strings. I tried making a JavaBean and then just calling it frmo the JSP but when compiling … |
| | I am trying to import a list from a txt file, but the reader skips the first line and also adds the last "null" line that the file writer adds. I fixed the null part but I can't seem to be able to add the first line in the list. …  |
| | Hi everyone I'm new here .I'm majoring on c++, I like python and Java too .but for now I'm busy with c++ programmingthanx for having me here.Regsrds...  |
| | I have two projects (one project Referenced in the form of a jar package.jar project can be referenced by multiple projects). mybatis interface code is written in the jar project(common project). datebase properties at war project. In the beginning, all the actual operations of the database were called in the … |
| | package Main2; import java.awt.Color; import java.awt.Dimension; import java.awt.Graphics; import java.awt.Graphics2D; import javax.swing.JPanel; public class GamePanel extends JPanel implements Runnable{ final int originalTileSize = 16; //16x16 tile final int scale = 3; final int tileSize = originalTileSize * scale; // 48x48 final int maxScreenCol = 16; final int maxScreenRow = 12; … |
| | 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 … |
| | I have been doing web development with PHP for the last few years, and like a lot of people, I have a strong dislike for PHP. I also have done lots of Java development, but never web development. Having a good knowledge of Java, I decided I would try web …  |
| | I'm trying to create a neural network of two hidden layers on Java. The data would be separated into two sets, training set and testing set. Both sets has 75 set of 4 data each row, and each class has their desired output (target). In terms of calculation, it will … |
| | 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 … |
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