create polymorphism for objects

Java/README.md

@@ -29,4 +29,5 @@
 
 ## Refactoring actions
 -[x] extract hardcoded variables
+-[x] create polymorphism for items
 

Java/src/main/java/com/gildedrose/GildedRose.java

@@ -1,11 +1,12 @@
 package com.gildedrose;
 
+import com.gildedrose.item.Item;
+
 class GildedRose {
     Item[] items;
 
     String BRIE = "Aged Brie";
     String BACKSTAGE = "Backstage passes to a TAFKAL80ETC concert";
-
     String SULFURAS = "Sulfuras, Hand of Ragnaros";
 
     public GildedRose(Item[] items) {

Java/src/main/java/com/gildedrose/item/Backstage.java

@@ -0,0 +1,7 @@
+package com.gildedrose.item;
+
+public class Backstage extends Item {
+    public Backstage(String name, int sellIn, int quality) {
+        super(name, sellIn, quality);
+    }
+}

Java/src/main/java/com/gildedrose/item/Brie.java

@@ -0,0 +1,7 @@
+package com.gildedrose.item;
+
+public class Brie extends Item {
+    public Brie(String name, int sellIn, int quality) {
+        super(name, sellIn, quality);
+    }
+}

Java/src/main/java/com/gildedrose/item/Item.java

@@ -1,4 +1,4 @@
-package com.gildedrose;
+package com.gildedrose.item;
 
 public class Item {
 

Java/src/main/java/com/gildedrose/item/Sulfuras.java

@@ -0,0 +1,7 @@
+package com.gildedrose.item;
+
+public class Sulfuras extends Item {
+    public Sulfuras(String name, int sellIn, int quality) {
+        super(name, sellIn, quality);
+    }
+}

Java/src/test/java/com/gildedrose/GildedRoseTest.java

@@ -2,6 +2,7 @@ package com.gildedrose;
 
 import static org.junit.jupiter.api.Assertions.*;
 
+import com.gildedrose.item.Item;
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Nested;
 import org.junit.jupiter.api.Test;

Java/src/test/java/com/gildedrose/TestHelper.java

@@ -1,5 +1,7 @@
 package com.gildedrose;
 
+import com.gildedrose.item.Item;
+
 public class TestHelper {
 
     static Item getItem(String name, Integer sellIn, Integer quality){

Java/src/test/java/com/gildedrose/TexttestFixture.java

@@ -1,5 +1,7 @@
 package com.gildedrose;
 
+import com.gildedrose.item.Item;
+
 public class TexttestFixture {
     public static void main(String[] args) {
         System.out.println("OMGHAI!");