moved specific logic in objects

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

@@ -1,9 +1,6 @@
 package com.gildedrose;
 
-import com.gildedrose.item.Backstage;
-import com.gildedrose.item.Brie;
 import com.gildedrose.item.Item;
-import com.gildedrose.item.Sulfuras;
 
 class GildedRose {
     Item[] items;
@@ -16,56 +13,7 @@ class GildedRose {
         for (int i = 0; i < items.length; i++) {
             final Item item = items[i];
             item.updateSellIn();
-            if(item.name.equals(Brie.BRIE)){
+            item.updateQuality();
-                updateBrieQuality(item);
-            }else if (item.name.equals(Backstage.BACKSTAGE)){
-                updateBackstageQuality(item);
-            }else if (!item.name.equals(Sulfuras.SULFURAS)){
-                updateItemQuality(item);
-            }
-        }
-    }
-
-    private void updateItemQuality(Item item) {
-        if (!item.name.equals(Backstage.BACKSTAGE)) {
-            if (item.quality > 0 ) {
-                item.decreaseQuality();
-            }
-        }
-        else {
-            if (item.quality < 50) {
-                item.increaseQuality();
-            }
-        }
-
-        if (item.sellIn < 0) {
-            if (!item.name.equals(Backstage.BACKSTAGE)) {
-                if ( item.quality > 0) {
-                    item.decreaseQuality();
-                }
-            } else {
-                item.quality = 0;
-            }
-        }
-    }
-
-    private void updateBackstageQuality(Item item) {
-        if (item.quality < 50) {
-            item.increaseQuality();
-        }
-        if (item.sellIn < 0) {
-            item.quality = 0;
-        }
-    }
-
-    private void updateBrieQuality(Item item) {
-        if (item.quality < 50) {
-            item.increaseQuality();
-        }
-        if (item.sellIn < 0) {
-            if (item.quality < 50) {
-                item.increaseQuality();
-            }
         }
     }
 

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

@@ -11,13 +11,21 @@ public class Backstage extends Item {
     @Override
     public void increaseQuality() {
         super.increaseQuality();
-
         if (this.sellIn < 11 && this.quality < 50) {
             super.increaseQuality();
         }
-
         if (this.sellIn < 6 && this.quality < 50) {
             super.increaseQuality();
         }
     }
+
+    @Override
+    public void updateQuality() {
+        if (this.quality < 50) {
+            this.increaseQuality();
+        }
+        if (this.sellIn < 0) {
+            this.quality = 0;
+        }
+    }
 }

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

@@ -14,4 +14,16 @@ public class Brie extends Item {
             super.increaseQuality();
         }
     }
+
+    @Override
+    public void updateQuality(){
+        if (this.quality < 50) {
+            this.increaseQuality();
+        }
+        if (this.sellIn < 0) {
+            if (this.quality < 50) {
+                this.increaseQuality();
+            }
+        }
+    }
 }

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

@@ -27,6 +27,17 @@ public class Item {
         this.quality = this.quality + 1;
     }
 
+    public void updateQuality(){
+        if (this.quality > 0) {
+            this.decreaseQuality();
+        }
+
+        if (this.sellIn < 0) {
+            if (this.quality > 0) {
+                this.decreaseQuality();
+            }
+        }
+    }
     public void updateSellIn() {
         this.sellIn = this.sellIn - 1;
     }

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

@@ -12,4 +12,9 @@ public class Sulfuras extends Item {
     public void updateSellIn() {
         //NO-OP
     }
+
+    @Override
+    public void updateQuality() {
+        //NO-OP
+    }
 }