templat

Templat ialah salah satu corak reka bentuk tingkah laku, kelas abstrak mentakrifkan satu set cara/templat untuk melaksanakan kaedahnya.

Subkelasnya boleh mengatasi/melaksanakan kaedah ini tetapi seruannya hendaklah dengan cara yang sama seperti yang ditakrifkan oleh kelas abstrak

Mari kita fahami ini dengan contoh:

Konsep utama
Templat: Kelas abstrak yang mentakrifkan struktur/cara/templat algoritma
Pelaksanaan Konkrit: Pelaksanaan Konkrit Templat
Pelanggan: Pelanggan yang akan menggunakan Templat ini

public abstract class Gametemplat{
    //these below methods can be overridden based on the type of game
    public abstract void initialize();
    public abstract void startPlay();
    public abstract void  endPlay();

    //All the subclasses must use this same method to play the game i.e. following the same template present in this method,
    //Hence it is declared as final.
    public final void play(){
        initialize();
        startPlay();
        endPlay();
    }
}

public class Cricket extends Gametemplat{


    @Override
    public void initialize(){
        System.out.println("Cricket has been initialized");
    }
    @Override
    public void startPlay(){
        System.out.println("Cricket game has been started");
    }
    @Override
    public void endPlay(){
        System.out.println("Cricket game has ended");
    }

}

public class Football extends Gametemplat{

    @Override
    public void initialize(){
        System.out.println("Football has been initialized");
    }
    @Override
    public void startPlay(){
        System.out.println("Football game has been started");
    }
    @Override
    public void endPlay(){
        System.out.println("Football game has ended");
    }

}

public class Main{
    public static void main(String args[]){

        //Create a football game object 
        Gametemplat football = new Football();
        football.play();// play() will strictly follow the sequence of method execution defined in the final play() method

        Gametemplat cricket = new Cricket();
        cricket.play();
    }
}

Output:

Football has been initialized
Football game has been started
Football game has ended
Cricket has been initialized
Cricket game has been started
Cricket game has ended

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