assignment 4

src/assn04/EmptyBST.java

@@ -0,0 +1,55 @@
+package assn04;
+
+public class EmptyBST<T extends Comparable<T>> implements BST<T> {
+
+	@Override
+	public BST<T> insert(T element) {
+		return new NonEmptyBST<T>(element);
+	}
+
+	@Override
+	public BST<T> remove(T element) {
+		return this;
+	}
+
+	@Override
+	public int getHeight() {
+		return -1;
+	}
+
+	@Override
+	public void printPreOrderTraversal() {
+		return;
+	}
+
+	@Override
+	public T findMin() {
+		throw new UnsupportedOperationException();
+	}
+
+	@Override
+	public void printPostOrderTraversal() {
+		return;
+	}
+
+	@Override
+	public BST<T> getLeft() {
+		throw new UnsupportedOperationException();
+	}
+
+	@Override
+	public BST<T> getRight() {
+		throw new UnsupportedOperationException();
+	}
+
+	@Override
+	public T getElement() {
+		throw new UnsupportedOperationException();
+	}
+
+	@Override
+	public boolean isEmpty() {
+		return true;
+	}
+
+}