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ShanukaPrabodhaShanukaPrabodha
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Implementing strategy design pattern
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‎Basics/Design Pattern contd/strategy/Duck.java‎

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package design.pattern.stratergy;
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public abstract class Duck {
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IFlyBehaviour flyBehaviour;
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IQuackBehaviour quackBehaviour;
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public abstract void display();
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public void performFly(){
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flyBehaviour.fly();
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}
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public void performQuack(){
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quackBehaviour.quack();
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}
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public void swim(){
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System.out.println("All ducks float even Decoy");
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}
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public void setFlyBehaviour(IFlyBehaviour flyBehaviour) {
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this.flyBehaviour = flyBehaviour;
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}
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public void setQuackBehaviour(IQuackBehaviour quackBehaviour) {
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this.quackBehaviour = quackBehaviour;
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}
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}

‎Basics/Design Pattern contd/strategy/FlyNoWay.java‎

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package design.pattern.stratergy;
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public class FlyNoWay implements IFlyBehaviour{
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@Override
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public void fly() {
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System.out.println("I can't fly");
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}
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}
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‎Basics/Design Pattern contd/strategy/FlyRocketPower.java‎

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package design.pattern.stratergy;
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public class FlyRocketPower implements IFlyBehaviour{
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@Override
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public void fly() {
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System.out.println("I am flying with a rocket");
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}
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}
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‎Basics/Design Pattern contd/strategy/FlyWithWings.java‎

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package design.pattern.stratergy;
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public class FlyWithWings implements IFlyBehaviour{
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@Override
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public void fly() {
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System.out.println("I am flying with wings");
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}
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}

‎Basics/Design Pattern contd/strategy/IFlyBehaviour.java‎

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package design.pattern.stratergy;
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public interface IFlyBehaviour {
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public void fly();
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}
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‎Basics/Design Pattern contd/strategy/IQuackBehaviour.java‎

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package design.pattern.stratergy;
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public interface IQuackBehaviour {
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public void quack();
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}
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‎Basics/Design Pattern contd/strategy/ModelDuck.java‎

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package design.pattern.stratergy;
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public class ModelDuck extends Duck{
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public ModelDuck() {
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quackBehaviour = new Quack();
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flyBehaviour = new FlyNoWay();
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}
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@Override
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public void display() {
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System.out.println("I am a model Duck");
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}
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}

‎Basics/Design Pattern contd/strategy/ModelQuack.java‎

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package design.pattern.stratergy;
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public class ModelQuack implements IQuackBehaviour{
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@Override
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public void quack() {
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System.out.println("Quack Model duck");
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}
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}

‎Basics/Design Pattern contd/strategy/MollardDuck.java‎

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package design.pattern.stratergy;
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public class MollardDuck extends Duck{
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public MollardDuck() {
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quackBehaviour = new Quack();
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flyBehaviour = new FlyWithWings();
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}
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@Override
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public void display() {
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System.out.println("I am a real Mollard Duck.");
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}
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}

‎Basics/Design Pattern contd/strategy/Quack.java‎

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package design.pattern.stratergy;
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public class Quack implements IQuackBehaviour{
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@Override
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public void quack() {
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System.out.println("Quack..Quack...");
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}
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}
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