Web Development with Java: An Introduction to Spring Boot Java is a popular programming language that is used for creating powerful web applications. It is also used for developing mobile applications, desktop…
Spring Boot: Simplifying Java Web Development with Annotations When it comes to developing web-based applications with Java, the process can often be overwhelming and time-consuming. Fortunately, there is a way to…
Java allows for Covariant Return Types, which means you can vary your return type as long you are returning a subclass of your specified return type. Method Overriding allows a subclass to override the behavior of an…
"The singleton pattern is a design pattern that restricts the instantiation of a class to one object. This is useful when exactly one object is needed to coordinate actions across the system." - Wikipedia: Singleton…
According to Wikipedia, a factory is simply an object that returns another object from some other method call, which is assumed to be "new". In this problem, you are given an interface Food. There are two classes Pizza…
You are required to compute the power of a number by implementing a calculator. Create a class MyCalculator which consists of a single method long power(int, int). This method takes two integers, and , as parameters and…
Exception handling is the process of responding to the occurrence, during computation, of exceptions – anomalous or exceptional conditions requiring special processing – often changing the normal flow of program…
Java Iterator class can help you to iterate through every element in a collection. Here is a simple example:import java.util.*;public class Example{ public static void main(String []args){ ArrayList mylist = new…
The Java instanceof operator is used to test if the object or instance is an instanceof the specified type. In this problem we have given you three classes in the editor: Student class Rockstar class Hacker class In the…
When a method in a subclass overrides a method in superclass, it is still possible to call the overridden method using super keyword. If you write super.func() to call the function func(), it will call the method that…
When a subclass inherits from a superclass, it also inherits its methods; however, it can also override the superclass methods (as well as declare and implement new ones). Consider the following Sports class:class…
A Java interface can only contain method signatures and fields. The interface can be used to achieve polymorphism. In this problem, you will practice your knowledge on interfaces. You are given an interface…
A Java abstract class is a class that can't be instantiated. That means you cannot create new instances of an abstract class. It works as a base for subclasses. You should learn about Java Inheritance before attempting…
Write the following code in your editor below: A class named Arithmetic with a method named add that takes integers as parameters and returns an integer denoting their sum. A class named Adder that inherits from a…
Using inheritance, one class can acquire the properties of others. Consider the following Animal class:class Animal{ void walk(){ System.out.println("I am walking"); }} This class has only one method, walk. Next, we…
Java's BitSet class implements a vector of bit values (i.e.: () or ()) that grows as needed, allowing us to easily manipulate bits while optimizing space (when compared to other collections). Any element having a bit…
You are given a list of student information: ID, FirstName, and CGPA. Your task is to rearrange them according to their CGPA in decreasing order. If two student have the same CGPA, then arrange them according to their…
In computer science, a set is an abstract data type that can store certain values, without any particular order, and no repeated values(Wikipedia). is an example of a set, but is not a set. Today you will learn how to…
For this problem, we have types of queries you can perform on a List: Insert at index : Insert x y Delete the element at index : Delete x Given a list, , of integers, perform queries on the list. Once all queries are…
Sometimes it's better to use dynamic size arrays. Java's Arraylist can provide you this feature. Try to solve this problem using Arraylist. You are given lines. In each line there are zero or more integers. You need to…
