Stack e Queue completati, compreso il toString. Versione sia array che lista.

queue/NodeQueue.java

@@ -64,10 +64,7 @@ public class NodeQueue<E> implements Queue<E> {
         }
     }
 
-    @Override
-    public boolean isFull() {
-        return false;
-    }
+
 
     @Override
     public int size() {
@@ -78,8 +75,7 @@ public class NodeQueue<E> implements Queue<E> {
     @Override
     public String toString() {
         Node<E> temp;
-        String to_return = "";
-        if (!isEmpty()){
+        String to_return = "[";
             for (temp = front;temp != null;temp = temp.getNext()){
                 to_return+=temp.getElement();
                 if (temp.getNext() != null){
@@ -87,8 +83,8 @@ public class NodeQueue<E> implements Queue<E> {
                 }
 
             }
+       to_return += "]";
 
-        }
         return to_return;
 
     }