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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 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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How to apply theme and color in wpf Metro window application

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In this example i am using Prism,unity and MahApps make sure you are also using same otherwise you will not get PrismApplication,BindableBase and MetroWindow .   MainWindow.xaml  <metro:MetroWindow x:Class="WpfApplication.Views.MainWindow"              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"              xmlns:local="clr-namespace:WpfApplication"              mc:Ignorable="d"              xmlns:metro="http://metro.mahapps.com/winfx/xaml/controls"       ...
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Print preview with Print in wpf using MVVM, Prism

  MainWindow.xaml  <Window x:Class="WpfDemo.Views.MainWindow"              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"              xmlns:local="clr-namespace:WpfDemo"              mc:Ignorable="d" Title="MainWindow">      <StackPanel Orientation="Vertical" HorizontalAlignment="Center">          <TextBlock Text="This is Print Preview demo"/>          <Button Content="Open file dialog" Command="{Binding ClickCommand}"  Margin...
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How to Enable/Disable Button on Validation using DelegateCommand of Prism

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  MainWindow.xaml  <Window x:Class="Wpf.Views.MainWindow"              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"              xmlns:local="clr-namespace:Wpf"              mc:Ignorable="d">      <Window.Resources>          <ControlTemplate  x:Key="TextBoxErrorStyle">              <StackPanel Orientation="Horizontal">                  <AdornedElementPlaceholde...
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