//জাভা (Java)
interface Playable {
    void play();
    void stop();
}
// Define a new interface called Downloadable
interface Downloadable {
    void download();
}
class VlcPlayer implements Playable {
    public void play() {
        System.out.println(“Vlc player is playing video.”);
    }
    public void stop() {
        System.out.println(“Vlc player is paused.”);
    }
}
// multiple interface implementation example
class SpotifyPlayer implements Playable, Downloadable {
    public void play() {
        System.out.println(“Spotify player is playing music.”);
    }
    public void stop() {
        System.out.println(“Spotify player is paused.”);
    }
    public void download() {
        System.out.println(“Spotify player is downloading music.”);
    }
}
public class HelloWorld {
    public static void testPlayable(Playable p) {
        p.play();
        p.stop();
    }
    public static void testDownloadable(Downloadable d) {
        d.download();
    }
    public static void main(String []args) {
        VlcPlayer vlc = new VlcPlayer();
        SpotifyPlayer spotify = new SpotifyPlayer();
        System.out.println(“Vlc Player Test!”);
        testPlayable(vlc);
        System.out.println(“Spotify Player Test!”);
        testPlayable(spotify);
        testDownloadable(spotify);
    }
}

//Output – আউটপুট
Vlc Player Test!
Vlc player is playing video.
Vlc player is paused.
Spotify Player Test!
Spotify player is playing music.
Spotify player is paused.
Spotify player is downloading music.

using System;
namespace App
{
	internal interface IPlayable
	{
		void Play();
		void Stop();
	}
	// Define a new interface called IDownloadable
	internal interface IDownloadable
	{
		void Download();
	}
	class VlcPlayer : IPlayable
	{
		public void Play()
		{
			Console.WriteLine(“Vlc player is playing video.”);
		}
		public void Stop()
		{
			Console.WriteLine(“Vlc player is paused.”);
		}
	}
	class SpotifyPlayer : IPlayable, IDownloadable
	{
		public void Play()
		{
			Console.WriteLine(“Spotify player is playing music.”);
		}
		public void Stop()
		{
			Console.WriteLine(“Spotify player is paused.”);
		}
		public void Download()
		{
			Console.WriteLine(“Spotify player is downloading music.”);
		}
	}
	class HelloWorld
	{
		// Use a common name, such as value or item, rather than repeating the type name
		public static void TestPlayable(IPlayable item)
		{
			item.Play();
			item.Stop();
		}
		public static void TestDownloadable(IDownloadable downloadable)
		{
			downloadable.Download();
		}
		public static void Main(string[] args)
		{
			VlcPlayer vlc = new VlcPlayer();
			SpotifyPlayer spotify = new SpotifyPlayer();
			Console.WriteLine(“Vlc Player Test!”);
			TestPlayable(vlc);
			Console.WriteLine(“Spotify Player Test!”);
			TestPlayable(spotify);
			TestDownloadable(spotify);
		}
	}
}

//Output – আউটপুট
Vlc Player Test!
Vlc player is playing video.
Vlc player is paused.
Spotify Player Test!
Spotify player is playing music.
Spotify player is paused.
Spotify player is downloading music.