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Java-HashMap

159+ posts

Count the unique type of nodes present in Binary tree

Last Updated: 30 November 2023

According to the property of a Binary tree, a node can have at most two children so there are three cases where a node can have two children, one child, or no child, the t...read more

Minimizing Operations to Prevent Palindrome Formation

Last Updated: 27 November 2023

Given a string S of length N (N = 2). You can choose any index and replace the character at that index with any other character of your choice any number of times, then th...read more

Geeks Premier League 2023

Length after removing Invalid K-Length Substrings

Last Updated: 07 November 2023

Given a string 'S' of length N which consists of both Uppercase and Lowercase English alphabets and a positive integer K (1 = K = N), the task is to return the length of t...read more

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Check if encrypted information remains confidential during its Validity Period

Last Updated: 09 November 2023

Given an array key of size n, instruction count representing the number of keys a hijacker can test per second, during a total validity period which is the average time to...read more

Java Program to Check Strings Anagram Using HashMap

Last Updated: 30 December 2023

Java Program to check whether two given strings are anagrams of each other or not using HashMap.What is an Anagram?A string is an anagram of another string if it contains ...read more

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Minimum number of operations required to vanish all elements

Last Updated: 24 November 2023

Given an array A[] length N along with an integer K. Select a subarray of size K and replace all elements with X (Cross), which has a minimum value in that subarray. Then ...read more

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Maximum Balanced Subsequence Score

Last Updated: 23 July 2024

Given a stock's prices for the past n days in the array stockPrice. Choose a subsequence (an ordered subset of an array's elements) of stock prices, called chosenDays, suc...read more

Python dictionary-programs

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Check if it is possible to make all strings of A[] equal to B[] using given operations

Last Updated: 11 January 2024

Consider two arrays, A[] and B[], each containing N strings. These strings are composed solely of digits ranging from 0 to 9. Then your task is to output YES or NO, by fol...read more

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Converting Integer-String HashMap to String-Array-Integer HashMap in Java

Last Updated: 29 December 2023

Efficient Conversion of a HashMapInteger, String into another HashMapString, Integer[] involves organizing integer keys based on their corresponding string values. Here's ...read more

Java-Class and Object

Java-HashMap

How does HashMap forEach() Method Work in Java 8?

Last Updated: 14 February 2024

The HashMap is a part of collections in the java.util package. The HashMap in Java stores the data in the form of a key-value pair. The HashMap takes the generic parameter...read more

Create Thread-safe HashMap Without Using Collections.synchronizedMap in Java

Last Updated: 31 January 2024

The HashMap class in Java is a commonly used data structure for storing key-value pairs. While HashMap provides fast and efficient operations, it is not inherently thread-...read more

How to Implement a Custom Hash function for Keys in a HashMap in Java?

Last Updated: 29 February 2024

In Java, HashMap is the data structure that implements the Map interface. This is used to save the data in the form of key-value pairs. In this article, we will learn how ...read more

How to Retrieve a Specific Value From a HashMap Using Key?

Last Updated: 09 February 2024

A HashMap is a data structure that implements a map interface in Java. It stores key-value pairs. On the key object's hashcode, it uses a hashing function for computing an...read more

Java Collection Exercise

Last Updated: 12 March 2024

The Java Collection framework is a fundamental part of the Java programming language, It covers a major part of Java and acts as a prerequisite for many Advanced Java Topi...read more

Java-Collection-Programs

How does HashMap handle resizing when it reaches its capacity in Java?

Last Updated: 12 March 2024

The capacity of a HashMap simply doubles when it reaches a certain threshold. The threshold depends on the initial capacity and the load factor of the HashMap. Consider Ca...read more

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