35,619 Topics
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 | ## Introduction ## While **Functional Interfaces** and **Function Types** are used to declare the types of a function, **Function Literals** create the actual implementations of these types. In this tutorial, we will learn what Kotlin **Function Literals** are and how to create them. ## Goals ## At the end of …  |
| | ## Introduction ## Whenever I want to express method parameters, return type or variables as a *method* in Java, I often find myself having to do a bit of work: 1. If I cannot remember which pre-made **functional interface** to use, then I will have to look up the list … |
| | ## Introduction ## When working on Java applications, it is very likely that you will run into JDBC at some point. While you are unlikely to have to work directly with JDBC when using frameworks, it is still important to know how the connection is established and how queries are … |
| | You must write a small application in JAVA for items and their prices. Your program must: 1. Create an array of item names. Use the following item names: Bread, Milk, Butter, Chips, Honey, Soap, Towel, Carrots, Beans, Samp, Dress, Pants, Shoes, Socks. 2. Create an array of item prices. Use …  |
| | User interface (UI) design is a process used by designers to create interfaces in software, such as computer devices, that focus on appearance or style. Designers want the interfaces to be easy to use and user-friendly. User interface design covers graphical user interfaces and other forms - such as voice-controlled … |
| | I don't want to pass ssh key through a file. I want to pass it along with the ssh command only along with user@ip. Can I modify that ssh command? Can anyone provide me the command to pass rsa key along with user?  |
| | ## Introduction ## When following tutorials on Daniweb, you might have run into one that requires knowledge about **Dependency Injection** as a prerequisite. People might also sometimes use the term **Inversion of Control** interchangeably with DI. These terms are related to one another, but they are not the same. In … |
| | ## Introduction ## Java annotations are often used to provide extra information for compilers, IDEs, and build tools. The extra information is often used to enhance the development cycle, such as reducing boilerplate, eliminating repetitive code, or warning against unsafe usage or mistakes. This tutorial aims to teach you the … |
| | So I have a method which takes upto 4 hours to execute. I need to stop this method within the first 30 mins of execution and have the available results upto that 30 mins of time only. Can someone help me with this? I have tried many things to terminate …  |
 | Jaluh is making a room inventory in the Hostel where she is working. They have 16 rooms labelled as A-P. She is doing this manually that it will consume more time. Make a program that will automatically be identified if the room is taken or not. An array code.. ANYONE …  |
| | You must write a small application in JAVA for items and their prices. Your program must: 1. Create an array of item names. Use the following item names: Bread, Milk, Butter, Chips, Honey, Soap, Towel, Carrots, Beans, Samp, Dress, Pants, Shoes, Socks. 2. Create an array of item prices. Use … |
| | Write a program that converts temperature from degrees Fahrenheit to degrees Celsius .The formula is C = (5.0/9.0) (F-32) |
| | Which declaration of the main method below would allow a class to be started as a standalone program. Select the one correct answer. public static int main(char args[]) public static void main(String args[]) public static void MAIN(String args[]) public static void main(String args) public static void main(char args[]) WHAT IS … |
| | I was working on an infix to postfix program (using stacks), but something went wrong somewhere. Please check whether my intopost technique is right because I am getting the output as infix without conversion. //stack class also containing the intopostfix method import java.util.*; public class Stack { int i,j; char … |
| | Write a program that prompts the user to input a four - digit positive integer.The program then outputs the digits of the number one digit per line |
 | Yes I finally decided to continue on with my programming efforts. I would like to be able to refer to myself as a master programmer, but I may not have that much time, after all I am almost 80 years old. Right now I'm delving into C++ and finding it …  |
| | Hello, I am developing android java filemanager app.. I used checkbox to check 1/file.mp4 2/folder(files+sub folders) . How can i add copy paste feature for checked 1, 2 file folder fully at same time ?like -google filemanager app.. Advance Thanks |
| | public class Clock { private int newHour; private int newMinutes; private int newSeconds; public Clock () { } public Clock (int newHour, int newMinutes, int newSeconds) { this.newHour = newHour; this.newMinutes = newMinutes; this.newSeconds = newSeconds; } public int getNewHour(int newHour){ return this.newHour; } public int getNewMinutes (int newMinutes){ return … |
| | ArrayList<MArry> databas = new ArrayList<MArry>(); //Add data into the databas databas.add(new MArry("Timothy", "SS1")); databas.add(new MArry("Olayemi", "SS2")); System.out.println("Student\tClass\n"); for (MArry myarry: databas) { System.out.printf("%s \n", myarry); } /*Please I need someone to check this out. Each time I run the code the output I'm getting is the memory address of the … |
 | Hello All, I am working on a project which based on python and java both and I am good at java. I want to know which programming language support high database connectivity? According to this [source](https://www.interviewbit.com/blog/java-vs-python/), Java provides stable connectivity but not an idea about python? Can anyone tell me … |
| | Can anyone help me on how can I fetch data of only current login user using Retrofit? For web development I do it like this "SELECT * FROM job_register WHERE job_assign ='{$_SESSION['username']}' AND job_status = '' " How can I implement this using Retrofit in Android? |
| | Hello, May I know why the frame pops up double when I call it? Thank You! Login.java (line 63); import java.awt.Font; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.io.BufferedReader; import java.io.FileReader; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JTextField; public class Login{ JFrame frame = new JFrame(); JButton loginButton = … |
| | I want to open JFrame (created from NetBeans) using the java class, but the JFrame is not showing up. I run the code from Eclipse. Here my class: (line 67) import java.awt.Font; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.io.BufferedReader; import java.io.File; import java.io.FileNotFoundException; import java.io.FileReader; import java.io.FileWriter; import java.util.Scanner; import javax.swing.JButton; … |
| | I'm trying to get a text at the customer.txt to validate if the customer has already registered Here is my code: import java.awt.Font; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.io.BufferedReader; import java.io.File; import java.io.FileNotFoundException; import java.io.FileReader; import java.io.FileWriter; import java.util.Scanner; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JPasswordField; import … |
| | Hello, I search many days about this problem. I'm curious if in a text file it's possible to sort words in a language in alphabetical order and in another language to ignore them using ArrayList?  |
 | Hi DW. Anyone who knows how can I achieve this? `List<String> dynamic[i];` The reason why I need this is that I'm creating a dynamic list with nested lists so there's no fixed number of data the list can be, this is inside the `for` statement which receive the json data … |
| | I don't get what's the problem with this Dictionary created using Arraylist and Socket . I get SocketException error I don't know why also I tried to created a method to read.... ClientCode: import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.PrintWriter; import java.net.Socket; import java.util.Scanner; import java.net.SocketException; public class Client … |
 | I'm trying to create two car objects, that move across the frame, in opposite directions, at different heights so they don't collide. This type of programming is new to me, and after following the only example I'm provided with, I still can't get this to work. All the code I … |
 | Hey guys is there a way to intercept shut down to make the user enter password if the state is in the locked state? Its just that I am engineering an anti-theft app and would to disable shut down from lock screen while the device is in the locked state. … |
| | import net.proteanit.sql.DbUtils; import javax.swing.*; import javax.xml.transform.Result; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.sql.*; public class EmployeeRegistriation { private JPanel Main; private JTextField txtName; private JTextField txtSalary; private JTextField txtMobile; private JButton saveButton; private JTable table1; private JButton updateButton; private JButton deleteButton; private JButton searchButton; private JTextField txtId; private JScrollPane tabla_1; public … |
| | If someone with a mechanical engineering BSc degree wants to have a job in cloud computing, would his mechanical engineering background benefit him in the high-tech filed ? |
| | trainSet = [[2, 2, 2, 'a'], [4, 4, 4, 'b'], [6, 6 , 6, 'b'] testInstance = [5, 5, 5] Similarity: Calculate the Euclidian distances between the testInstance and all point of trainSet (Three points) In our case: Three distances between [5, 5, 5] and [2, 2, 2], [4, 4, … |
| | I am new to coding and want some insights how can I find the duplicate in a text file and that duplicate will be store it to another text file. |
| | Hello, I have project and user writes date(using scanner etc.) which saves to an ArrayList and I need to sort the dates. (There is the code (its in Czech) den = day, mesic = month, rok = year, datum = date) public class Ukoly { protected String predmet; protected String … |
| | iOS app development has to main part of development in the new era  |
| | I'm trying to manage Splunk with Chef and ran across a problem when using Chef to programmatically start/stop/restart the Splunkforwarder service: The request did not respond to the start or control request in a timely fashion. - ControlService: The service did not respond to the start or control request in … |
| | 1. Methods to search for a book If the user chooses that option he should be asked of he wants to search for it using the book’s title (or part of it) or using the name of one of the authors (or part of the name) Depending on that search … |
 | I have a very complex java program written with net beans 7.1. It consists of 1 .java file that has a main(), and over 25 supporting .java files (most used for routines inside of tabs). In addition there are 15 different databases (embedded) associated with it. The program is virtually …  |
| | I am writing a program that makes hands of five cards, and tests them against poker combinations. Wikipedia says you have a 1/254 chance in getting a straight, but I get an abysmally small mount of straights in each run. (around 50 in one million hands). Can anyone tell me … |
| | I'm looking for help on CloudFormation Template for Glue Jobs orchestration for below scenario: Suppose I have 10 AWS Glue Jobs, 4 jobs should be executed parallel and 6 jobs should be executed sequentially. If any job failure, send Workflow "Failure" notification along with the failed Glue Jobname. Job1 Job2----job5-->job6-->job7 … |
 | Thank you for your help! My code was: package com.Main.tile; import com.Main.GamePanel; import com.Main.UtilityTool; import javax.imageio.ImageIO; import java.awt.*; import java.awt.image.BufferedImage; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; public class TileManager { GamePanel gp; public Tile[] tile; public int mapTileNum[] []; public TileManager(GamePanel gp){ this.gp = gp; tile = new … |
| | Here is my code: package com.Main.tile; import com.Main.GamePanel; import com.Main.UtilityTool; import javax.imageio.ImageIO; import java.awt.*; import java.awt.image.BufferedImage; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; public class TileManager { GamePanel gp; public Tile[] tile; public int mapTileNum[] []; public TileManager(GamePanel gp){ this.gp = gp; tile = new Tile[10]; mapTileNum = new …  |
| | Good day all, am new here, probably don't know if am doing it right. My import.java.util.Scanner is not working on my intelliJ IDEA, thanks in advance!!   |
| | I need help "error: file not found: C:\Program Files\Java\jdk-18\JCreatorV4\MyProjects\main.java Usage: javac <options> <source files>" this and this-"Error: Could not find or load main class main Caused by: java.lang.ClassNotFoundException: main" keep popping up the code I'm using is the simple hello world for java the name is main.java public class main … |
| | Is there a way to print out numbers for pre-order, post-order and in-order traversals of trees using just recursion and a number. The trees are binary and n is the number of nodes from the parent to al children. Can anyone help me write the function to print the numbers … |
| | I am using intellij for the java coursework which is related to clients and databases. I am receiving the following error Exception in thread "main" java.lang.NullPointerException: Cannot invoke "java.net.URL.toExternalForm()" because "location" is null at java.desktop/javax.swing.ImageIcon.<init>(ImageIcon.java:232) at client.Interface.$$$setupUI$$$(Interface.java) at client.Interface.<init>(Interface.java:54) at client.Application.main(Application.java:317) This is the code: ` ` package client; //region … |
| | [SIZE=4][FONT=Arial]Hi, I'm creating an application that makes use of the GridBagLayout as it is the most useful layout manager for what I need. I made a JPanel and added it to the frame. The result I'm currently getting during run-time is a JFrame with a JPanel placed in the center. … |
| | I want to create a java pane with a canvas on the left and column of other components on the right. I did this long ago but lost that code. Can anyone point me in the right direction to do this? |
| | I'm broadcasting an intent in my app and receiving it with a broadcast receiver. I can handle the broadcasting and receiving. No problem with that. However, I want to register the receiver completely programmatically instead of doing it in the manifest file. Notice, that in the manifest file, there are … |
| | I have a problem with a DnD program, so when I add 2 or more images and apply a filter to one of the images (using a right click), it only appears on the last image added. I think i have to store the image in an Array while waiting … |
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