Anonymous

	public int getTreeHeight() {		if(root != null) {			return 1+Math.max(getTreeHeight(root.right),getTreeHeight(root.left));		} else {			return 0;		}	}		private int getTreeHeight(Node currentNode) {		if(currentNode == null) {			return 0;		} else {			return 1+Math.max(getTreeHeight(currentNode.left),getTreeHeight(currentNode.right));		}	}