Template Design pattern or Template Method Design pattern - Implementation [Coffee]

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Template Design pattern or Template Method Design pattern - Implementation [Coffee]

Template Design pattern or Template Method Design pattern - Implementation [Coffee] - Class Diagram

CoffeeTemplate.java

public abstract class CoffeeTemplate

{

/*

 *  prepareCoffee method is a template method,this method is final,so

 *  subclasses cannot override.

 */

public final void prepareCoffee()

{

boilWater();

addMilk();

addSugar();

addCoffeePowder();

System.out.println("Hot coffee ready.....");

}

public abstract void boilWater();

public abstract void addMilk();

public abstract void addSugar();

public abstract void addCoffeePowder();

}

BruCoffee.java

public class BruCoffee extends CoffeeTemplate

{

@Override

public void boilWater()

{

System.out.println("100 ml water boiled");

}

@Override

public void addMilk()

{

System.out.println("100 ml milk Added");

}

@Override

public void addSugar()

{

System.out.println("100 grams sugar Added");

}

@Override

public void addCoffeePowder()

{

System.out.println("10 grams Bru coffee powder Added");

}

}

NescafeCoffee.java

public class NescafeCoffee extends CoffeeTemplate

{

@Override

public void boilWater()

{

System.out.println("200 ml water boiled");

}

@Override

public void addMilk()

{

System.out.println("200 ml milk Added");

}

@Override

public void addSugar()

{

System.out.println("200 grams sugar Added");

}

@Override

public void addCoffeePowder()

{

System.out.println("20 grams Nescafe coffee powder Added");

}

}

CoffeeClient.java

public class CoffeeClient

{

public static void main( String[] args )

{

System.out.println("Bru coffee preparation\n");

CoffeeTemplate bruCoffee = new BruCoffee();

bruCoffee.prepareCoffee();

System.out.println("*******************************************");

System.out.println("Nescafe coffee preparation\n");

CoffeeTemplate NescafeCoffee = new NescafeCoffee();

NescafeCoffee.prepareCoffee();

}

}

Output

Bru coffee preparation

100 ml water boiled

100 ml milk Added

100 grams sugar Added

10 grams Bru coffee powder Added

Hot coffee ready.....

*******************************************

Nescafe coffee preparation

200 ml water boiled

200 ml milk Added

200 grams sugar Added

20 grams Nescafe coffee powder Added

Hot coffee ready.....

See also:

Template Design pattern or Template Method Design pattern - Introduction

Template Design pattern or Template Method Design pattern - Real Time Example [Coffee]

Template Design pattern or Template Method Design pattern - Real Time Example [Car]

Template Design pattern or Template Method Design pattern - Class Diagram

Template Design pattern or Template Method Design pattern - Implementation [Building a House]

Template Design pattern or Template Method Design pattern - KeyPoints

All Design Patterns Links