36,051 Topics
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| | The code is here: https://medium.com/swlh/balancing-chemical-equations-with-python-837518c9075b  |
| | Hello. Can anyone please answer and explain the question from the image here. Thank you!  |
 | ## Introduction ## If you are a Java developer coming to Kotlin, you might have wondered how to use a language construct that is similar to the try-with-resource statement in Java to automatically close Autocloseable/Closeable resources for you. Luckily, Kotlin provides the inline extension function `use()` that provides similar functionality … |
| | ## Introduction ## In Java, a common way to express a type that is a combination of two or more types is to just create an interface that extends the other types. The problem with this approach is that your code might be littered with interface declarations, polluting your code … |
| | ## Introduction ## In this tutorial, we will look at the RxJava `mergeWith()` and `concatWith()` operators. Amongst others, they are used to combine Observables together. All of the RxJava operators have ambiguous names, and behave differently, so let us take a look at 2 operators, `mergeWith()` and `concatWith()`, to see … |
| | ## Introduction ## RxJava 3 includes 5 core classes: 1. Flowable, 2. Observable, 3. Single, 4. Completable, 5. Maybe. This tutorial aims to teach the basic concepts behind Observable, which serves as a foundation for understanding the other 4 classes. ## Goals ## At the end of the tutorial, you … |
| | A shop owner has 2 outlets namely a High Street Branch and Mall Branch, before Covid19 lockdown the respective shops recorded sales as follows: High Street Branch Quarter Sales Q1 42,000 48,000 50,000 Q2 52,000 58,000 60,000 Q3 46,000 49,000 58,000 Q4 50,000 51,000 61,000 Mall Branch Quarter Sales Q1 …  |
 | I am a Data Science Enthusiast, Currently Exploring Different Types of Programming Languages.  |
| | how can we use math .pi without using impot java.lang.Math*; PROGRAMING LANG:- JAVA |
| | ## Introduction ## The `java.nio.file.Files` class includes many convenient methods to read file attributes, but sometimes these convenient methods just are not enough to meet our needs. In this tutorial, we will go over 5 ways to use the `Files` class to read file attributes so you can choose the … |
| | I was recently started to learn Java (3 months back started), It's going well, learned a lot. I am reffering this [website](https://www.scaler.com/topics/stack-class-in-java/) to undersatand about **Java Stack Class**. Can someone tell me which method is best to implement stack class? Happy Coding! |
| | ## Introduction ## When working with an application with a global user base, there is usually a need to display text, numbers, currency, date, and time in multiple localized formats. For example, the **en-US** (*English-USA*) version of the date September 22, 2021 is written as 22 сентября 2021 г. when … |
| | ## Introduction ## Although not included in the headlines, the release of JDK 17 also added 3 sets of new methods to the class `java.lang.Process`: 1. `inputReader()` to read from stdout. 2. `inputWriter()` to write to stdin. 3. `errorReader()` to read from stderr. In this tutorial, we are going to … |
| | can anyone help me to make an app |
| | I need an end user license agreement for code shared amongst my home projects with other developers. The EULA needs to include a "pay to the order of x" clause, and also needs to include the ability for me to utilze the code at multiple companies that I could participate …  |
| | ## Introduction ## In Java 8, `@Repeatable` was introduced and this is the recommended way to create repeating annotations. We still have to create a holder Annotation(*annotation that holds an array of other annotations*), but we no longer have to declare the holder Annotation at the callsite. This tutorial aims … |
| | import requests endPoint = 'https://api.mnotify.com/api/template' apiKey = 'YOUR_API_KEY' url = endPoint + '?key=' + apiKey response = requests.get(url) data = response.json(); |
| | I'm having trouble in my assignment Assignment :: TwoLargestElements Complete the following program so that it computes and writes out the two largest elements in the array. It always display "12" on both largest and largest2 import java.io.* ; public class TwoLargest { public static void main ( String[] args … |
| | ## Introduction ## Java 15 introduced Text Blocks. The main reason behind Text Blocks is that programmers can write multiline strings without having to specify escapes for the most common scenarios. ## Goals ## At the end of this tutorial, you would have learned: 1. How to store multiline String …  |
| | ## Introduction ## Before Java 8, methods had to throw an exception or return `null`, with neither of which approaches were perfect. Optional, OptionalInt, OptionalLong, and OptionalDouble were introduced in Java 8 to represent values that might possibly be `null`. Optionals have two internal states, **empty** or **present**. An Optional … |
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 | Hi All, Good Day. Is there any sample code in JAVA for generating encrypted block PIN in the similar fashion as the Hardware Security Module Regards, Sagar |
| | Hi guys I can't seem to get a new line in a [CODE]JOptionPane.showMessageDialog(null, " ");[/CODE] statement. I try the /n command, but it still doesn't seem to work. Is there any way I can get a paragraph in a dialog box like this? Thanks. |
 | I'm supposed to make a menu with choices, the choices being different kinds of java syntax. import java.util.*; public class Start { public void menu() { System.out.println("[1] If\n[2] If else\n[3] For loop\n[4] Switch Statement\n[5] One dimension"); System.out.print("Select program: "); } public void backend() { System.out.println("[9] Menu\n[0] Quit"); Scanner q = … |
| | ## Introduction ## There are many ways to design secure Java objects. In this tutorial, we are going to learn how to create secure Java objects by understanding **Accessibility**, **Extensibility**, and **Immutability**. ## Goals ## At the end of this tutorial, you would have learned: 1. Understand how and why … |
| | Hi Everyone, Is there a java code to convert SWIFT MT103 message to pacs 008 ISO20022 format? Thank you. Regards, Sagar |
| | ## Introduction ## In this tutorial, we will focus on how to manage IO permissions to read, write, and delete local files using the `SecurityManager` class. ## Goals ## At the end of this tutorial, you would have learned: 1. What policy files are and how to use them. 2. … |
| | Hello, I need help to make this code to run please. this is just a part of the code. I have the imports below, but hsa.Console is not imported, I have tried to download de jar files for it but cannot find it. Is there a way I could make … |
| | // The "FriedmanRPSgame" class. import java.awt.*; import hsa.Console; public class FriedmanRPSgame { static Console c; // The output console public static void main (String[] args) { c = new Console (); // VARIABLES int rock; int paper; int scissors; // INPUT c.println (" Choose 1 for rock, 2 for paper, … |
| | Hi, I am new to this forum and also new to android programming using Android Studio and am stuck on a coding problem so i am not sure this is the right forum but any help is much appreciated: I am trying to get some some code via the processing-core … |
| | Been programming more than half my life and been in industry for over a decade. |
| | #include <iostream> using std::cin; using std::cout; using std::endl; using std::ios; #include <iomanip> using std::fixed; using std::setw; using std::setprecision; using std::showpoint; int main() { const int PEOPLE = 5; const int PRODUCTS = 6; int sales[5][6]={{1},{2},{3},{4}}; double value; double totalSales; double productSales[ PRODUCTS ] = { 0.0 }; int salesPerson; int … |
| | ## Introduction ## Java 14 was released with a new type of expression called Switch Expression. Its syntax is similar to that of the Switch Statement, with a few differences. In this tutorial, we will walk through concepts related to the Switch Expression and learn how to use it. ## … |
| | ## Introduction ## In this tutorial, we are going to learn how to create a Java module by hand. ## Goals ## At the end of this tutorial, you would have learned: 1. What a `module-info.java` file is. 2. How to compile a module. 3. Describing a module. ## Prerequisite … |
| | ## Introduction ## This tutorial introduces the `CyclicBarrier` class and teaches you how to use it. ## Goals ## At the end of this tutorial, you would have learned: 1. How to use `CyclicBarrier` to synchronize tasks across multiple threads. ## Prerequisite Knowledge ## 1. Intermediate Java. 2. Basic knowledge … |
| | ## Introduction ## `partitioningBy()` collects a `Stream` into a `Map`. In this tutorial, we will compare the two different `partitioningBy` methods and learn how to use them. ## Goals ## At the end of this tutorial, you would have learned: 1. What `Collectors.partitioningBy` does and how to use it. ## … |
| | ## Introduction ## Based on the 2020 Java Ecosystem survey from Jetbrains, 75% of Java developers are still using JDK 8. JDK 11 introduces `HttpClient`, which replaces the legacy `HttpURLConnection` API. For this tutorial, we will build a `HttpClient` that consumes the free Cat Facts API. ## Goals ## At … |
| | I am in trouble. I need to convert a signed 16-bit Hexadecimal no to short. Say I have a string s = "f2f7" Which is a negative number and lies in the range -32768 to 32767 so is the range of type short. But when I do short num ; … |
 | I am attaching my complete code. I am not able to get why doesn't my KeyListener work. None of the KeyListener events are fires on pressing the keyboard. Please have a look and tell me the flaws in my code package swing; //First Class (separated class) import javax.swing.JFrame; public class … |
| | ## Introduction ## This tutorial teaches you how to create a Spring Boot application that provides RESTful API Endpoints. These endpoints are best consumed by other applications or for integrating with a SPA (Single Page Application) frontend such as Angular. For the purpose of this tutorial, we will create a … |
 | Hello I am currently learning Android app development, and using Android Studio 4.1.3. I have noticed that when I run any project, even like a simple "Hello World", the Gradle build takes more than 10 minutes to complete. I have a laptop which is a Core i5 7th Gen, with …  |
| | ``` if (credits >= 30) { pnlSuccess.setVisible(true); pnlpass.setVisible(false); busdocRef.update("onbus", FieldValue.arrayUnion(txtRFID.getText())); busdocRef.update("passengers", FieldValue.increment(1)); docRef.update("travelling", Data.busid); docRef.update("slat", slat); docRef.update("slon", slon); txtRFID.setText(""); Thread.sleep(2000); pnlSuccess.setVisible(false); pnlpass.setVisible(true); txtRFID.requestFocus(); } ``` This si the code But the pass pnl do not hide and the success panel do not show up |
 | I've been writing one/two projects but I not using them. I'm not sure in which scenario I should use them. Is this consider bad programming style? |
 | /*******************************************************************************************************************| | Assignment 2 | | Program is meant to extract a record from each file and create a new file for each record | | Programs creates a new directory and uses the directory for each new file | | | | written by Raymond Chappel | | | … |
| | I built a Web server myself, want to achieve the entire browser minimization,except "JAVA" and "JSP", what method can achieve this effect. There are a lot of examples of browser minimization using "JS" on the internet, but none of them worked for me. Some people mentioned that it might be … |
| | I work in IT as a UNIX Systems engineer and I am studying towards a BSc IT degree. |
| | HI!! How can I create an automatic numerical progression from 0 to 500,000 in html? The code I was given is this: <p><span style="font-family: Calibri, sans-serif;"><span style="text-shadow: rgba(255, 255, 255, 0.8) 0px 3px 2px;"><sup>437</sup></span></span></p> how can i make the code progressive and automatic every three minutes? The progression I have … |
| | Task is to create a basic calculator using double value and sentinel. I cannot figure out how to get the array to avoid counting the sentinel. To me, it looks like I've put in safeguards such as only looping if the value is >=0, but it still counts, lists, and … |
 | How to find the first non repeated character of a given String?  |
| | how to create 2 array matrix in dart programming  |
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