Implement Singly Linked List detectLoop in Java.
It would check whether the linked list contains a loop, return true if there exist a loop, false if not.
// Java program to detect a loop in a linked list
import java.util.*;
public class LinkedList {
static Node head; // head of list
/* Linked list Node*/
static class Node {
int data;
Node next;
Node(int d)
{
data = d;
next = null;
}
}
/* Inserts a new Node at front of the list. */
static public void push(int new_data)
{
/* 1 & 2: Allocate the Node &
Put in the data*/
Node new_node = new Node(new_data);
/* 3. Make next of new Node as head */
new_node.next = head;
/* 4. Move the head to point to new Node */
head = new_node;
}
// Returns true if there is a loop in linked
// list else returns false.
static boolean detectLoop(Node h)
{
HashSet<Node> s = new HashSet<Node>();
while (h != null) {
// If we have already has this node
// in hashmap it means their is a cycle
// (Because you we encountering the
// node second time).
if (s.contains(h))
return true;
// If we are seeing the node for
// the first time, insert it in hash
s.add(h);
h = h.next;
}
return false;
}
/* Driver program to test above function */
public static void main(String[] args)
{
LinkedList llist = new LinkedList();
llist.push(20);
llist.push(4);
llist.push(15);
llist.push(10);
/*Create loop for testing */
llist.head.next.next.next.next = llist.head;
if (detectLoop(head))
System.out.println("Loop found");
else
System.out.println("No Loop");
}
}
Implement Singly Linked List detectLoop in Java. It would check whether the linked list contains a...
iImplement a Singly Linked List detectLoop in Java, it would check whether the linked list contains a loop. Print true if yes, false if not. Test by using the following code: LL<Integer> L = new LL<>(); for (int i = 1000; i > 0; i-=3) sl.add(i); try { L.insert(122, L.getNode(70), L.getNode(21)); if (L.detectLoop()) System.out.println("True"); else System.out.println("False."); } catch(Exception e){ e.printStackTrace(); } class Linkedlist<E>{ private static class Node<E>{ private E element; private Node<E> next; public Node(E e, Node<E> n){ element =...
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