Adapter Design Pattern Example

Duck.java

package com.art.head_first.turkeyadapter;

public interface Duck {

  public void quack();
  public void fly();

}

DuckTestDrive.java

package com.art.head_first.turkeyadapter;

import org.junit.Test;

public class DuckTestDrive {

  @Test
  public void testTurkeyAdapter(){

    MallardDuck duck = new MallardDuck();
    WildTurkey turkey = new WildTurkey();

    System.out.println("**************************************************");
    System.out.println("Turkey Says: ");
    turkey.gobble();
    turkey.fly();

    System.out.println("**************************************************");
    System.out.println("Duck Says");
    performDuckActions(duck);


    System.out.println("**************************************************");
    System.out.println("Turkey Adapter Says: ");
    Duck turkeyAdapter = new TurkeyAdapter(turkey);

    performDuckActions(turkeyAdapter);
  }

  private void performDuckActions(Duck duck){
    duck.quack();
    duck.fly();
  }

}

MallardDuck.java

package com.art.head_first.turkeyadapter;

public class MallardDuck implements Duck{

  @Override
  public void quack() {
    System.out.println("Quack");
  }

  @Override
  public void fly() {
    System.out.println("I'm Flying");

  }
}

Turkey.java

package com.art.head_first.turkeyadapter;

public interface Turkey {

  public void gobble();
  public void fly();

}

TurkeyAdapter.java

package com.art.head_first.turkeyadapter;

public class TurkeyAdapter implements Duck {

  Turkey turkey;

  public TurkeyAdapter(Turkey turkey) {
    this.turkey = turkey;
  }

  @Override
  public void quack() {
    turkey.gobble();

  }

  @Override
  public void fly() {
    for (int i=0; i<5; i++){
      turkey.fly();
    }

  }
}

WildTurkey.java

package com.art.head_first.turkeyadapter;

public class WildTurkey implements Turkey{

  @Override
  public void gobble() {
    System.out.println("Gobble Gobble");
  }

  @Override
  public void fly() {
    System.out.println("I'm flying short distance");

  }
}