using compareTo in Binary Search Tree program
- by Scott Rogener
I've been working on this program for a few days now and I've implemented a few of the primary methods in my BinarySearchTree class such as insert and delete. Insert seemed to be working fine, but once I try to delete I kept getting errors. So after playing around with the code I wanted to test my compareTo methods. I created two new nodes and tried to compare them and I get this error:
Exception in thread "main" java.lang.ClassCastException: TreeNode cannot be cast to java.lang.Integer
at java.lang.Integer.compareTo(Unknown Source)
at TreeNode.compareTo(TreeNode.java:16)
at BinarySearchTree.myComparision(BinarySearchTree.java:177)
at main.main(main.java:14)
Here is my class for creating the nodes:
public class TreeNode<T> implements Comparable
{
protected TreeNode<T> left, right;
protected Object element;
public TreeNode(Object obj)
{
element=obj;
left=null;
right=null;
}
public int compareTo(Object node)
{
return ((Comparable) this.element).compareTo(node);
}
}
Am I doing the compareTo method all wrong? I would like to create trees that can handle integers and strings (seperatly of course)
