Iterator and ListIterator are interfaces in Java that allow us to iterate over a collection of objects. However, there are some differences between them: The Iterator interface can be used…
In Java, both HashMap and TreeMap are used for key-value pair storage. However, there are some differences between them: Ordering: HashMap does not maintain any order for the elements, while…
In Java, both LinkedHashMap and HashMap are used for key-value pair storage. However, there are some differences between them: Ordering: HashMap does not maintain any order for the elements, while…
In this tutorial, we will see java program to remove a loop in linked list In this code,If a loop is detected, we use another pointer to find the starting…
In this tutorial, we will see Java program to detect a cycle in a linked list The LinkedList class defines a Node inner class that represents a node in the…
In this tutorial, we will see Java program to implement a stack using a linked list class Stack { static class Node { int data; Node next; Node(int d) {…
In this, we will see java code to remove duplicates from linked list Java Code: class LinkedList { static class Node { int data; Node next; Node(int d) { data…
In this post, we will see Valid Parenthesis with stack. This solution uses a counter to keep track of the balance of parentheses. Whenever an opening parenthesis is encountered, the…
ConcurrentHashMap and Hashtable are both classes in Java that provide thread-safe implementations of the Map interface. However, there are some key differences between the two: Synchronization: Hashtable is synchronized, meaning…
Problem: Given array of size ‘n’ and left rotate k times Input : [1,2,3,4,5,6,7], K=3 Left Rotate 1: 2,3,4,5,6,7,1 Left Rotate 2: 3,4,5,6,7,1,2 Left Rotate 3: 4,5,6,7,1,2,3 Solution: Reverse the…
