Update Strategy patten source code

java/strategy/.classpath

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
+	<classpathentry kind="src" path=""/>
+	<classpathentry kind="output" path=""/>
+</classpath>

java/strategy/.gitignore

@@ -0,0 +1,13 @@
+/Duck.class
+/FlyBehavior.class
+/FlyNoWay.class
+/FlyRocketPowered.class
+/FlyWithWings.class
+/MallardDuck.class
+/MiniDuckSimulator.class
+/ModelDuck.class
+/MuteQuack.class
+/Quack.class
+/QuackBehavior.class
+/Squeak.class
+/DuckSimulator.class

java/strategy/.project

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>strategy</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>

java/strategy/DuckSimulator.java

@@ -0,0 +1,25 @@
+public class DuckSimulator {
+  public static void main(String[] args) {  
+    Duck mallard = new MallardDuck(); // A duck object
+
+    mallard.setFlyBehavior(new FlyWithWings()); // Set an Algorithm(Fly): FlyWithWings
+    mallard.performFly(); // Fly based on Algorithm FlyWithWings
+
+    // So I can change the algorithm in future with the help of Set method where I do not need to change existing code
+    // and inject the updated or new algorithm
+
+    mallard.setQuackBehavior(new Squeak()); // Set an Algorithm(Quack): Squeak
+    mallard.performQuack(); // Quack based on Algorithm Squeak
+
+    Duck model = new ModelDuck(); // Another duck object
+    model.setFlyBehavior(new FlyRocketPowered());  //Set a Algorithm(Fly): FlyRocketPowered
+    model.performFly(); // Fly based on Algorithm FlyRocketPowered
+
+    // Suppose this kind of duck can not quack so create an algorithm (no quack ability) and inject it
+    model.setQuackBehavior(new MuteQuack());
+    model.performQuack();
+  }
+
+  //Note: We can also set the algorithms inside the duck object Class: MallardDuck or ModelDuck
+  //But we may need to change the algorithm in future which violates open close principle
+}

java/strategy/MallardDuck.java

@@ -1,7 +1,9 @@
 public class MallardDuck extends Duck {
   public MallardDuck() {
-    quackBehavior = new Quack();
-    flyBehavior = new FlyWithWings();
+    //We also can set manually the algorithms from the class itself: like below code
+
+	//quackBehavior = new Quack();
+    //flyBehavior = new FlyWithWings();
   }
 
   public void display() {

java/strategy/ModelDuck.java

@@ -1,7 +1,9 @@
 public class ModelDuck extends Duck {
   public ModelDuck(){
-    flyBehavior = new FlyNoWay();
-    quackBehavior = new Quack();
+    //We also can set manually the algorithms from the class itself: like below code
+
+	//quackBehavior = new Quack();
+    //flyBehavior = new FlyWithWings();
   }
 
   public void display() {