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Java Articles
Page 221 of 450
Difference between Inheritance and Interface in Java
Inheritance is a Method to create a hierarchy between multiple classes by replicating some properties from others. There are various types of inheritance present in Java, such as single inheritance, multiple inheritance, multilevel inheritance, hybrid inheritance, and hierarchical inheritance. Interface is the blueprint of a particular class which consists of the constant and abstract class. The interface class allows a machine to apply some specific properties on an object or a class. It is totally an abstract method which helps to perform the Java abstraction on a collection by specifying the behavior of a class. Now the task ...
Read MoreHow to Iterate LinkedList in Java?
The LinkedHashMap Class is similar to HashMap. But it has an additional feature in comparison to HashMap. The LinkedList class belongs to the java.util package. A doubly linked list is how LinkedList stores its elements. Given that our operations typically include insertion and deletion, LinkedList is the best option. The java.util package contains the LinkedList collection framework. It acts as an implementation of the non-contiguous LinkedList data structure, which saves elements in memory. Methods Used There are five main methods that you can use for iterating HashMap − Using the for loop Making use of a while loop Using ...
Read MoreHow to Iterate the Vector Elements in the Reverse Order in Java?
The Vector class has been a part of the Java collection system since Java version 1.2. Vectors are sometimes known as Dynamic Arrays because, unlike ordinary arrays, they can expand and contract in size. Ensuring thread-safety, Vectors are synchronized. While there exists a third approach that involves using Apache Commons to iterate through the vector in reverse, this method necessitates the downloading of additional jar files and packages, which is not widely supported by most systems. Essentially, there are only two primary methods to traverse through vector elements in reverse order. Methods Used There are two methods used here − ...
Read MoreHow to iterate over a 2D list (list of lists) in Java?
A data structure known as a 2D list or list of lists can be utilised for saving a collection of data in a two-dimensional format. A row in the 2D list is represented by each inner list in this list of lists. A 2D list could be utilised, for instance, to store the data for a chessboard, where every component in the list corresponds to a single square on the board. Methods Used A 2D list can be iterated in one of the two methods that follow − Using Loops Using iterator Method 1: Employing Loops There are ...
Read MoreHow to Iterate LinkedHashMap in Reverse Order in Java?
The LinkedHashMap serves the purpose of maintaining the precise order of element addition. It elucidates the method for accessing elements in the sequence they were inserted. In addition to storing values based on their keys, the LinkedHashMap class expands upon the functionalities of the Hash Map class and implements the Map interface. It exclusively accommodates unique elements or mappings. It affords us the flexibility to utilize various data types, such as text, float, integer, etc., for assigning keys and values. By initially reversing the elements, we can alter the order of elements in the linked hash map. Subsequently, we can ...
Read MoreDigits whose alphabetic representations are jumbled in a given string
In today's article, we will dive deep into a unique problem related to string manipulation in C++. The problem is "Digits whose alphabetic representations are jumbled in a given string." This problem can serve as an excellent exercise for enhancing your string manipulation and data structure skills in C++. Problem Statement Given a string, the task is to identify the digits whose alphabetic representations are jumbled within the string. For instance, if the input string is "oentow", it has a jumbled representation of the digit two (t, w, o) and one (o, n, e). C++ Solution Approach To solve this ...
Read MoreCustom Jumble Word Game
In this article, we will explore the concept of creating a custom Jumble Word Game in C++. Word puzzles are not only entertaining but also a great way to improve vocabulary and cognitive skills. We will walk you through the process of designing and implementing the game using C++ and provide a test case example to illustrate how the game works. Custom Jumble Word Game The objective of the Jumble Word Game is to unscramble a given set of letters to form a valid word. Players are given a jumbled word, and they have to rearrange the letters to form ...
Read MoreCount ways to select three indices from Binary String with different adjacent digits
In this problem, we will find the number of pairs of 3 indices so that any adjacent indices don’t have the same value in the pair. We can get the output by checking each pair of 3 indexes, but it can be more time-consuming. Another approach to solving the problem is to take the current index and also take the index from left and right, which doesn’t contain a similar value to the current index's value. This way, we can count the total number of pairs each index can form and sum them to get the output. Problem statement − ...
Read MoreCount ways to place all the characters of two given strings alternately
In this article, we will examine the concept of counting the ways to place all characters of two given strings alternately. This problem can appear in programming challenges and interviews, and mastering the solution will help you improve your string manipulation and algorithm skills. We will explain the problem statement, discuss the algorithm used, present the C++ implementation, and provide a test case example to illustrate the solution. Problem Statement Given two strings s1 and s2, find the number of ways to place all the characters of both strings alternately, such that the characters from s1 and s2 are placed ...
Read MoreCount substrings made up of a single distinct character
In this article, we'll discuss the problem of counting the number of substrings in a given string that consist of a single distinct character. We'll explore an efficient algorithm for solving this problem and provide C++ code to implement it. Problem Statement Given a string S, the task is to count the number of substrings that are made up of a single distinct character. For example, if the input string is "aaaaa", then the output should be 15, because there are 15 substrings that consist of a single distinct character. The substrings are "a", "a", "a", "a", "a", "aa", "aa", ...
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