Sign in Subscribe

Topic

Java

A collection of 57 issues

Web Development with Java: An Introduction to Spring Boot

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 applications, and even embedded systems. In recent years, Java has become a popular choice for web development due

Spring Boot: Simplifying Java Web Development with Annotations

Spring Boot: Simplifying Java Web Development with Annotations

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 simplify the development process and make it easier for developers to create web applications: Spring Boot. Spring Boot is

Hackerrank Covariant Return Types Solution

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 existing superclass method and specify a return type that is some subclass of

Hackerrank Java Singleton Pattern Solution

"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 Pattern Complete the Singleton class in your editor which contains the following components: 1. A

Hackerrank Java Factory Pattern Solution

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 and Cake which implement the Food interface, and they both contain a

Hackerrank Java Exception Handling Solution

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 finds . If either or is negative, then the method must throw an exception

Hackerrank Java Exception Handling (Try-catch) Solution

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 execution. (Wikipedia) Java has built-in mechanism to handle exceptions. Using the try statement we can test a block of code for errors.

Hackerrank Java Iterator Solution

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 ArrayList(); mylist.add("Hello"); mylist.add("Java"); mylist.add("4"); Iterator it = mylist.iterator(); while(it.

Hackerrank Java Instanceof keyword Solution

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 main method, we populated an ArrayList with several instances of these