Implementato Binary Tree. Bisogbna testarlo. da implementare il tostring

binarytree/BTPosition.java

@@ -0,0 +1,14 @@
+package binarytree;
+
+
+import position.Position;
+
+public interface BTPosition<E> extends Position<E> { 	// inherits element()
+  public void setElement(E o);
+  public BTPosition<E> getLeft(); 
+  public void setLeft(BTPosition<E> v); 
+  public BTPosition<E> getRight(); 
+  public void setRight(BTPosition<E> v); 
+  public BTPosition<E> getParent(); 
+  public void setParent(BTPosition<E> v);
+}