Hi whenever I Run my code I get a ClassCastException Error of the following kind:

Exception in thread "main" java.lang.ClassCastException: LeafNode cannot be cast to InternalNode at twothree.print_range(Solution.java:38) at twothree.print_range(Solution.java:56) at Solution.main(Solution.java:27)

Can anyone help me identify and fix the error? As far as I can see, I am not declaring any LeafNodes as InternalNodes. I have marked the lines where the error occurs with $. My code is as follows:

public class Solution public static void main (String[] args) /*Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Sol TwoThreeTree main new TwoThreeTree(); Scanner scannew Scanner(System.in); int insert_numscan.nextInt(); for (inti-0; i 0)( twothree.print_range (end, start, main1.root); else f twothree.print_range (start, end, main1.root); $$$$ class twothree static void print range(String start,String end, Node n) String guide- n.guide; Interna!Node n1 = (Interna!Node) n; Node c1 = n1.child@ Node c2 n1.child1; Node c3 = n1, child2 LeafNode 11 = (LeafNode) n1.child@; LeafNode 12 (LeafNode) n1. child1; LeafNode 13 (LeafNode) n1.child2; $$$$ //tree not within range if (guide.compareTo (start) 0)( twothree.print_range (end, start, main1.root); else f twothree.print_range (start, end, main1.root); $$$$ class twothree static void print range(String start,String end, Node n) String guide- n.guide; Interna!Node n1 = (Interna!Node) n; Node c1 = n1.child@ Node c2 n1.child1; Node c3 = n1, child2 LeafNode 11 = (LeafNode) n1.child@; LeafNode 12 (LeafNode) n1. child1; LeafNode 13 (LeafNode) n1.child2; $$$$ //tree not within range if (guide.compareTo (start)