Adapter Pattern implementation in java

               It is a structural pattern which organizes the classes and objects. Adapter Pattern is one of its types. This pattern makes the different interfaces to run together.

Java implementation:

              It connects the incompatible interfaces to work together. Let us create two interfaces.

• One is MPlayer (A media player). It has a play () method.
• Another interface is AMediaPlayer. It also has playMP4() method.
• A class (MP3Player) is created for MPlayer interface.
• ‘play()’ method is used to play Mp3 file.
• In the same way, another class(MP4Player) is created for AMediaPlayer interface.
• The ‘playMP4()’ definition is written.
• Adapter class is created with method. It connects both of the interfaces.
• A public class ‘MPPlay’ is developed with main() class.
• Objects are newly created for both classes. ‘play()’ and ‘playMP4()’ functions are called to display the result.

Program:

// interface 1

interface MPlayer {

    void play(String fname);

}

//class1 with method1

class MP3Player implements MPlayer {

    public void play(String fname) {

        System.out.println("Playing MP3 file: " + fname);

    }

}

//interface 2

interface AMediaPlayer {

    void playMP4(String fname);

}

//class 2 with method2

class MP4Player implements AMediaPlayer {

    public void playMP4(String fname) {

        System.out.println("Playing MP4 file: " + fname);

    }

}

//Adapter class definition

class MAdapter implements MPlayer {

    private AMediaPlayer aMediaPlayer;

    MAdapter(String format) {

        if (format.equalsIgnoreCase("mp4")) {

            aMediaPlayer = new MP4Player();

        }

    }

    public void play(String fname) {

        aMediaPlayer.playMP4(fname);

    }

}

//main() function

public class MPPlay {

    public static void main(String[] args) {

        MPlayer player1 = new MP3Player();

        player1.play("Manos Mars - The Tunning.mp3");

        MPlayer player2 = new MAdapter("mp4");

        player2.play("j1.mp4");

    }

}

The program is developed.

Output:

Compile and run the program to get the output.

C:\raji\blog>javac MPPlay.java

C:\raji\blog>java MPPlay

Playing MP3 file: Manos Mars - The Tunning.mp3

Playing MP4 file: j1.mp4

This is the java implementation of Adapter pattern. Hope, this code will helpful to you. Keep Coding!!!