update,

_resources/it114105/itp4510/Lab03/Lab3.3/LinkedQueue.java

@@ -0,0 +1,42 @@
+public class LinkedQueue {
+    LinkedList qll;
+
+    public LinkedQueue() {
+        qll = new LinkedList();
+    }
+
+    public int size() {
+        return qll.getCount();
+    }
+
+    public boolean isEmpty() {
+        return qll.isEmpty();
+    }
+
+    public void enqueue(Object item) throws QueueFullException {
+        qll.addToTail(item);
+    }
+
+    public Object dequeue() throws QueueEmptyException {
+        try {
+            Object item = qll.removeFromHead();
+            return item;
+        } catch (EmptyListException e) {
+            throw new QueueEmptyException();
+        }
+    }
+
+    public String toString() {
+        return qll.toString();
+    }
+
+    public Object front() throws QueueEmptyException {
+        try {
+            Object item = qll.removeFromHead();
+            qll.addToHead(item);
+            return item;
+        } catch (EmptyListException e) {
+            throw new QueueEmptyException();
+        }
+    }
+}