Basic Hash Table Implementation in Java
Aditya Bhuyan This document provides a simple implementation of a hash table in Java. A hash table is a data structure that offers a way to efficiently store and retrieve data using…
Hashing
Count Frequencies of Elements in an Array Using Hashing in Java
Java Program import java.util.HashMap; import java.util.Map; public class FrequencyCounter { /** * Counts the frequency of each element in the given array. * * @param array the array of integers…
Two Sum Problem Solution in Java
The Two Sum problem is a common algorithmic challenge that requires finding two numbers in an array that add up to a specific target value. This solution uses a hash…
Find Subarray with Given Sum in Java
Program Overview This Java program finds a contiguous subarray within a one-dimensional array of integers that sums to a specified value. It utilizes a hash map to store the cumulative…
Java Program to Group Anagrams
Program Code import java.util.*; public class AnagramGrouper { /** * Groups anagrams from a list of strings. * * @param strs List of strings to group into anagrams. * @return…
Java Program to Find the Longest Consecutive Sequence
Program import java.util.HashSet; public class LongestConsecutiveSequence { /** * Finds the length of the longest consecutive elements sequence. * * @param nums an array of integers * @return the length…
Check if a Subarray with a Sum of Zero Exists in Java
Java Program import java.util.HashSet; public class SubarrayZeroSum { /** * Checks if there exists a subarray with a sum of zero. * * @param arr The input array of integers.…
Union and Intersection of Two Arrays using Hashing in Java
This document contains a Java program to find the union and intersection of two arrays using hashing techniques. We will use a HashSet to store elements and achieve efficient lookups.…
Finding Duplicate Subtrees in a Binary Tree in Java
This document presents a Java program that identifies duplicate subtrees in a binary tree using hashing. The approach leverages a serialization technique combined with a hash map to efficiently track…
Count Distinct Elements in Every Window of Size k in Java
This Java program counts the number of distinct elements in every sliding window of size k in a given array. It utilizes a hash map (or dictionary) to track the…
