added flyweight sample

flyweight/src/main/java/com/iluwatar/AlchemistShop.java

@@ -0,0 +1,49 @@
+package com.iluwatar;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class AlchemistShop {
+
+	List<Potion> topShelf;
+	List<Potion> bottomShelf;
+	
+	public AlchemistShop() {
+		topShelf = new ArrayList<>();
+		bottomShelf = new ArrayList<>();
+		fillShelves();
+	}
+
+	private void fillShelves() {
+		topShelf.add(new InvisibilityPotion());
+		topShelf.add(new InvisibilityPotion());
+		topShelf.add(new StrengthPotion());
+		topShelf.add(new HealingPotion());
+		topShelf.add(new InvisibilityPotion());
+		topShelf.add(new StrengthPotion());
+		topShelf.add(new HealingPotion());
+		topShelf.add(new HealingPotion());
+		
+		bottomShelf.add(new PoisonPotion());
+		bottomShelf.add(new PoisonPotion());
+		bottomShelf.add(new PoisonPotion());
+		bottomShelf.add(new HolyWaterPotion());
+		bottomShelf.add(new HolyWaterPotion());
+	}
+	
+	public void enumerate() {
+
+		System.out.println("Enumerating top shelf potions\n");
+		
+		for (Potion p: topShelf) {
+			p.drink();
+		}
+		
+		System.out.println("\nEnumerating bottom shelf potions\n");
+		
+		for (Potion p: bottomShelf) {
+			p.drink();
+		}
+		
+	}
+}