Update IPriorityQueue.java

src/edu/caltech/cs2/interfaces/IPriorityQueue.java

@@ -15,10 +15,12 @@ public interface IPriorityQueue<E> extends IQueue<IPriorityQueue.PQElement<E>> {
             this.priority = priority;
         }
 
+        @Override
         public int hashCode() {
             return this.data.hashCode();
         }
 
+        @Override
         public boolean equals(Object o) {
             if (!(o instanceof PQElement)) {
                 return false;
@@ -26,7 +28,7 @@ public interface IPriorityQueue<E> extends IQueue<IPriorityQueue.PQElement<E>> {
             return this.data.equals(((PQElement)o).data);
         }
 
-
+        @Override
         public String toString() {
             return "(" + this.data + ", " + this.priority + ")";
         }