5

Inventory.java

             || items[i].getName().equals("Backstage passes to a TAFKAL80ETC concert")) {
                 //level 2 - quality
                 if (items[i].getQuality() < 50) {
-                    updateQuality(items[i], 1);
+                    increaseQualityBy1(items[i]);
                     //level 3 - item type
                     if (items[i].getName() == "Backstage passes to a TAFKAL80ETC concert") {
                         //level 4 - sell in date
                         if (items[i].getSellIn() < 11) {
                             //level 5 - quality
                             if (items[i].getQuality() < 50) {
-                                updateQuality(items[i], 1);
+                                increaseQualityBy1(items[i]);
                             }
                         }
                         //level 4 - sell in date
                         if (items[i].getSellIn() < 6) {
                             //level 5 - quality
                             if (items[i].getQuality() < 50) {
-                                updateQuality(items[i], 1);
+                                increaseQualityBy1(items[i]);
                             }
                         }
                     }
                 if (items[i].getQuality() > 0) {
                     //level 3 - item type
                     if (!items[i].getName().equals("Sulfuras, Hand of Ragnaros")) {
-                        updateQuality(items[i], -1);
+                        reduceQualityBy1(items[i]);
                     }
                 }
             }
 
             //level 1 - item type
             if (!items[i].getName().equals("Sulfuras, Hand of Ragnaros")) {
-                updateSellIn(items[i]);
+                reduceSellInBy1(items[i]);
             }
 
             //level 1 - sell in date
                 if (items[i].getName().equals("Aged Brie")) {
                     //level 3 - quality
                     if (items[i].getQuality() < 50) {
-                        updateQuality(items[i], 1);
+                        increaseQualityBy1(items[i]);
                     }
                     //level 2 - item type
                 } else if (items[i].getName().equals("Backstage passes to a TAFKAL80ETC concert")){
-                    //level 3 - item type
-
-                    updateQuality(items[i], -items[i].getQuality());
+                    setQualityTo0(items[i]);
                     //level 3 - item type
                 } else {
                     //level 4 - quality
                     if (items[i].getQuality() > 0) {
                         //level 5 - item type
                         if (!items[i].getName().equals("Sulfuras, Hand of Ragnaros")) {
-                            updateQuality(items[i], -1);
+                            reduceQualityBy1(items[i]);
                         }
                     }
                 }
         }
     }
 
-    public void updateQuality(Item item, int amount){
-        item.setQuality(item.getQuality() + amount);
+    public void reduceQualityBy1(Item item){
+        item.setQuality(item.getQuality() -1);
+    }
+    
+    public void increaseQualityBy1(Item item){
+        item.setQuality(item.getQuality() + 1);
+    }
+    
+    public void setQualityTo0(Item item){
+        item.setQuality(item.getQuality() - item.getQuality());
     }
 
-    public void updateSellIn(Item item){
+    public void reduceSellInBy1(Item item){
         item.setSellIn(item.getSellIn() - 1);
     }
 }