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TreeToDLL.java
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TreeToDLL.java
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package main.java.linkedlist;
/**
*
* Code to covert Tree to Doubly Linked List.
* @author mohitjai
*
*/
public class TreeToDLL {
static LinkedListNode head = null;
LinkedListNode prev = null;
static class LinkedListNode {
int value;
LinkedListNode next;
LinkedListNode prev;
LinkedListNode(int value){
this.value = value;
this.next = null;
this.prev = null;
}
}
static class TreeNode {
int value;
TreeNode left;
TreeNode right;
TreeNode(int value){
this.value = value;
this.left = null;
this.right = null;
}
}
private void ConvertTreetoLinkedList(TreeNode root){
if(root == null){
return;
}
ConvertTreetoLinkedList(root.left);
LinkedListNode new_node = new LinkedListNode(root.value);
if(head == null){
head = new_node;
prev = head;
} else {
prev.next = new_node;
new_node.prev = prev;
prev = new_node;
}
ConvertTreetoLinkedList(root.right);
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
TreeNode root = new TreeNode(10);
root.left = new TreeNode(20);
root.right = new TreeNode(30);
root.left.left = new TreeNode(40);
root.left.right = new TreeNode(50);
TreeToDLL treeToDll = new TreeToDLL();
treeToDll.ConvertTreetoLinkedList(root);
while (head != null){
System.out.print(head.value);
if(head.next != null){
System.out.print("->");
}
head = head.next;
}
}
}