added iterator sample

iterator/src/main/java/com/iluwatar/TreasureChest.java

@@ -0,0 +1,34 @@
+package com.iluwatar;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class TreasureChest {
+
+	private List<Item> items;
+	
+	public TreasureChest() {
+		items = new ArrayList<>();
+		items.add(new Item(ItemType.POTION, "Potion of courage"));
+		items.add(new Item(ItemType.RING, "Ring of shadows"));
+		items.add(new Item(ItemType.POTION, "Potion of wisdom"));
+		items.add(new Item(ItemType.POTION, "Potion of blood"));
+		items.add(new Item(ItemType.WEAPON, "Sword of silver +1"));
+		items.add(new Item(ItemType.POTION, "Potion of rust"));
+		items.add(new Item(ItemType.POTION, "Potion of healing"));
+		items.add(new Item(ItemType.RING, "Ring of armor"));
+		items.add(new Item(ItemType.WEAPON, "Steel halberd"));
+		items.add(new Item(ItemType.WEAPON, "Dagger of poison"));
+	}
+	
+	ItemIterator Iterator(ItemType type) {
+		return new TreasureChestItemIterator(this, type);
+	}
+
+	public List<Item> getItems() {
+		ArrayList<Item> list = new ArrayList<>();
+		list.addAll(items);
+		return list;
+	}
+	
+}