35,617 Topics
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| | 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? |
| | I'm facing a database connection error in my MySQL-based application. The credentials are correct, but I keep getting: ERROR 1045 (28000): Access denied for user 'admin'@'localhost' Is it a privilege issue, host misconfiguration, or MySQL version mismatch? Seeking expert developers in the USA to resolve and optimize the database connection.  |
| | 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 … |
| | Hii I am a developer working on a blockchain MVP development. I want to add MVP features to the app, but I am not sure where to start. Can anyone provide some guidance? Thank You  |
| | 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 … |
 | Hi I am thrilled to join the the dev community. I think, i will contribute to this community by asking & responding your questions and queries |
| | 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. |
 | 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 … |
 | Hi DW, I've faced an issue with my project, it has been working these years till I think last year or the other year. When I sync it fails saying unable to resolve dependency no matter which version I try I get similar error differs with version number.  |
 | 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. |
 | hey friends could you please tell me that how many types are there  |
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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 |
| | Hi, Goodday everyone, I'm new to web development, please if I had questions, could I ask on her for a help reply? |
| | 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 … |
 | So here, I am gonna to ask developers around which is the most popular language is used to develop a game for students or professionals. |
| | 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 … |
 | How this concept is related to JavaScript's asynchronous nature? |
 | 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' … |
| | Describe prototypal inheritance in JavaScript. How does it differ from classical inheritance in other programming languages? |
| | 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] |
| | I've just finished reading Eric Matthes' Python Crash Course. A book which I found great to learn Python within a short time. The learning process wasn't really hard for me as I was already familiar with programming in other languages. Now I'm done with it and I've just started learning … |
| | 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. |
| | heyy guys.. m implementing PEER TO PEER FILE TRANSFER.. What protocol should I use? TCP or UDP? And why? |
| | 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. |
| | It is to make some changes to an existing app, does anyone know how to use this tool? :) |
| | Hi guyz, What is the main purpose of alpha and beta testing? From your own personal experience. Why is Beta Testing is very much important in mobile app development?  |
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| | What are the best platforms that you would prefer for mobile app development?  |
| | Hi guyz, What are elements in web design?  |
| | Hi guyz, Is AI is more efficient in understanding the nature language in the space of software development? |
| | Hi guys, what are the different types of java applications |
| | Hi guyz, What are the APIs you guys using to build an SEO softwares? |
| | Hi guyz, What are the 2 main types of software? not specifically, in general. |
| | 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 … |
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| | Hello everyone, i am in some kind of testing stage where i want to test some security flaws on websites/browsers with the cookies. I want to generate google cookies with a different time period. (older than 2 months). Firstly I will try to integrate into the browser via JS Secondly …  |
| | Hi guys, What pages does an ecommerce website need?  |
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