diff --git a/java/BinaryTree/BinNode.java b/java/BinaryTree/BinNode.java
new file mode 100644
index 0000000..0c865c3
--- /dev/null
+++ b/java/BinaryTree/BinNode.java
@@ -0,0 +1,17 @@
+
+/** ADT for binary tree nodes */
+
+public interface BinNode<E> {
+	/** Get and set the element value */
+	public E element();
+	public void setElement(E v);
+
+	/** @return The left child */
+	public BinNode<E> left();
+
+	/** @return The right child */
+	public BinNode<E> right();
+
+	/** @return True if a leaf node, false otherwise */
+	public boolean isLeaf();
+}