code clean up changes.

src/main/java/com/zipcodewilmington/gildedrose/Inventory.java

 
 
 public class Inventory {
-    private Item[] items;
+    private static Item[] items;
 
     public Inventory(Item[] items) {
+
         super();
         this.items = items;
     }
 
 
-    public void updateQuality() {
+    public static void updateQuality() {
+
         for (int i = 0; i < items.length; i++) {
+
             if (!items[i].getName().equals("Aged Brie")
                     && !items[i].getName().equals("Backstage passes to a TAFKAL80ETC concert")) {
+
                 if (items[i].getQuality() > 0) {
+
                     if (!items[i].getName().equals("Sulfuras, Hand of Ragnaros")) {
                         items[i].setQuality(items[i].getQuality() - 1);
                     }
                 }
             } else {
+
                 if (items[i].getQuality() < 50) {
                     items[i].setQuality(items[i].getQuality() + 1);
 
                     if (items[i].getName() == "Backstage passes to a TAFKAL80ETC concert") {
+
                         if (items[i].getSellIn() < 11) {
+
                             if (items[i].getQuality() < 50) {
                                 items[i].setQuality(items[i].getQuality() + 1);
                             }
                         }
 
                         if (items[i].getSellIn() < 6) {
+
                             if (items[i].getQuality() < 50) {
                                 items[i].setQuality(items[i].getQuality() + 1);
                             }
             }
 
             if (items[i].getSellIn() < 0) {
+
                 if (!items[i].getName().equals("Aged Brie")) {
+
                     if (!items[i].getName().equals("Backstage passes to a TAFKAL80ETC concert")) {
+
                         if (items[i].getQuality() > 0) {
+
                             if (!items[i].getName().equals("Sulfuras, Hand of Ragnaros")) {
                                 items[i].setQuality(items[i].getQuality() - 1);
                             }
                         }
                     } else {
-                        items[i].setQuality(items[i].getQuality()
-                                - items[i].getQuality());
+
+                        items[i].setQuality(0);
                     }
                 } else {
+
                     if (items[i].getQuality() < 50) {
                         items[i].setQuality(items[i].getQuality() + 1);
                     }