update,

it114105/itp4510/Lab03/Lab3.2/LinkedStack.java

@@ -0,0 +1,39 @@
+public class LinkedStack implements Stack {
+    private LinkedList sll = new LinkedList();
+
+    @Override
+    public int size() {
+        return sll.getCount();
+    }
+
+    @Override
+    public boolean isEmpty() {
+        return sll.isEmpty();
+    }
+
+    @Override
+    public void push(Object item) throws StackFullException {
+        sll.addToHead(item);
+    }
+
+    @Override
+    public Object pop() throws StackEmptyException {
+        try {
+            Object item = sll.removeFromHead();
+            return item;
+        } catch (EmptyListException e) {
+            throw new StackEmptyException();
+        }
+    }
+
+    @Override
+    public Object top() throws StackEmptyException {
+        try {
+            Object item = sll.removeFromHead();
+            sll.addToHead(item);
+            return item;
+        } catch (EmptyListException e) {
+            throw new StackEmptyException();
+        }
+    }
+}