public abstract class AbstractTree implements Tree {
@Override /** Inorder traversal from the root*/
public void inorder() {
}
@Override /** Postorder traversal from the root */
public void postorder() {
}
@Override /** Preorder traversal from the root */
public void preorder() {
}
@Override /** Return true if the tree is empty */
public boolean isEmpty() {
return getSize() == 0;
}
//
// @Override /** Return an iterator for the tree */
// public java.util.Iterator iterator() {
// return null;
// }
}