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Java 17 for Absolute Beginners: A Complete Guide to Get Started with Java Programming

Want to start learning Java programming ? This guide is just for you. We’ll cover the basics of Java 17 in simple language— no experience needed! ✅ What You’ll Learn: What is Java? Java 17 Features ( for beginners) Basic Syntax Data Types Operators Conditionals Loops Functions ( Methods) Object- Oriented Programming ( OOP) New Java 17 features ( Text blocks, Records) Practice Program 📌 What is Java? Java is: ✅ A popular and easy- to- learn language ✅ Platform- independent ( write once, run anywhere) ✅ Object- oriented ( based on real- world objects) ✅ Used for apps, websites, games, and more Java 17 is the latest Long- Term Support ( LTS) version, released in 2021. 1. Java 17 Basic Syntax Every Java program has a class and a main() method. public class HelloJava {     public static void main(String[] args) {         System.out.println("Hello, Java 17!");     } } 🔹 Notes: public cla...
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How to create Expandable TextBox in Wpf

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Step 1: Right click on project Step 2: Click on Add and select New Item Step 3: Search for Custom Control Step 4: Select Custom Control(WPF) Step 5: Write ExpandableTextBox in Name and click on Add It will create one class with the Name ExpandableTextBox with following code: namespace CustomControl.Controls { public class ExpandableTextBox : Control { static ExpandableTextBox() { DefaultStyleKeyProperty.OverrideMetadata(typeof(ExpandableTextBox), new FrameworkPropertyMetadata(typeof(ExpandableTextBox))); } } } It will also create a folder called Themes inside this folder it will create ResourceDictionary with the Name Generic with folowing code: Generic.xaml <ResourceDictionary xmlns:local="clr-namespace:Wpf" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"> <Style TargetType="{x:Type local:ExpandableTextBox...
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How to Import/Export data of DataGrid from/to CSV file in wpf using MVVM

In this post i will explain how to Import/Export data of DataGrid from/to CSV file in wpf using MVVM To Import CSV to DataGrid i have created method called LoadCSV() which will load CSV data and update the DataGrid  private void LoadCSV()         {             LstEmployees.AddRange(File.ReadAllLines("csvFilePath")                                          .Skip(1)                                          .Select(v => CsvToEmployees(v))                                          .ToList());         }          In LoadCSV() method i am first reading the CSV using File cla...
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Multiple ways to handle Checked/Unchecked event in wpf using MVVM

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In this post i am trying to explain multiple way to handle Checked/Unchecked event in wpf using MVVM First let's create a view which contains multiple CheckBox.  All CheckBox will handle the Checked/Unchecked event differently.  CheckBoxEx.xaml <Window x:Class="PrismApp.Views.CheckBoxEx"              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"              xmlns:prism="http://prismlibrary.com/"              prism:ViewModelLocator.AutoWireViewModel="True">     <StackPanel >         <CheckBox Content="Bind Command by passing CheckBox as CommandParameter but set command parameter type is object" HorizontalAlignment="Left" VerticalAlignment="Center"  Name="chkObj"            ...
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How to save data from datagrid to database in C# WPF?

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DataGridEx.xaml <Window x:Class="PrismApp.Views.DataGridEx"              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"              xmlns:prism="http://prismlibrary.com/"              prism:ViewModelLocator.AutoWireViewModel="True">     <Grid>         <DataGrid ItemsSource="{Binding LstEmployees}"                   AutoGenerateColumns="False" CanUserAddRows="False" >             <DataGrid.Columns>                 <DataGridTextColumn Header="Employee Id" Binding="{Binding EmpId}" IsReadOnly="True"/>                 <DataGridTextColumn Header="Emp...
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How to print Hello World on console using reflection in C#?

using System; namespace ConsoleProject {     class Program     {         static void Main(string[] args)         {             //get the method by method name and with string argument types             //Here GetMethod() will return the info of WriteLine(string value)             //and invoke() will call WriteLine method by passing the string "Hello World"             //this line equivalent to Console.WriteLine("Hello World");             typeof(Console).GetMethod("WriteLine", new Type[] { typeof(string) }).Invoke(default, new object[] { "Hello World" });             Console.ReadLine();         }     } }
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