Author: Akshay Kulkarni

Spring Boot Spring Boot is a project built on top of the Spring Framework. We can easily create standalone, production-grade Spring-based applications using Spring Boot. It provides a simpler and faster way to set up, configure, and run simple and web-based applications. It provides multiple production-ready features such as health checks and metrics that help to monitor and manage your application. Problems with Spring It is a vast framework, so sometimes it’s challenging to start application development. We must follow many setup steps to configure Spring applications and other resources like databases. We have to follow multiple steps to build…

Introduction If you’re just starting with Java, you’ve probably come across the term String. It’s one of the most used classes in the language, yet many beginners find it a bit confusing at first. In this blog, you’ll find the Java String class explained in the simplest possible way—through real-life stories, easy code examples, and a friendly Q&A format. Whether you’re preparing for interviews or building your basics, this guide will make String handling in Java feel effortless. What is the String class in Java? The String class is declared inside the java.lang package. It is a non-primitive data type…

Introduction An array is a linear data structure. In a linear data structure, data is stored in a specific manner. It is a finite and homogeneous collection of elements. We cannot change the size of an array once it is declared, making it finite. It is homogeneous because it stores the same type of elements. In Java, programmers use arrays to store multiple elements into a single variable. How does an Array in Java work?We understand that arrays store homogeneous information in a single variable. Let’s illustrate this with an example. java//storing data using variable int data1=23; int data2=15; int…

What are control statements? Java programs mainly use control statements to govern the execution flow. Every programming language supports the concept of control statements. Control statements play an important role in logical programming. In Java, two main categories classify control statements. Decision making Looping statements Decision Making statements Decision-making statements apply conditions or restrictions to program data; they serve as the control statements in this context. It is possible to control the execution flow of a program by applying different conditions or restrictions. Following statements come under decision making category if-else switch enhanced switch if…else statement It is a type…

Introduction In Java, we declare everything in terms of classes and objects. An object is an entity that possesses its own state and behavior. State represents characteristics of an object whereas, Behavior represents functionality of an object. In terms of java, object is a copy of non static members. Non-static data members represent state of an object  whereas non-static function member represents behavior of an object. Class acts as a container for object  state and behavior. We also refer to an object as an instance of the class. in java. javapublic class TV { String company=”SONY”; double price=35000.50; boolean isSmartTv=true;…

Introduction to Java Constructors Java constructors initialize the state of an object and serve as special members of the class. Since constructor is a special member of the class, its name and class name should be the same. Constructor does not have any return type The compiler or the user must declare a constructor for every Java class. If the compiler declares the constructor, we refer to it as a default constructor. The compiler will define the constructor only if a user-defined constructor is absent and it can define only zero parameterized constructor. If the programmer defines the constructor then…

What is Framework? A framework is a platform for developing software applications. It provides a foundation on which software developers can build programs. In other words, the framework is a collection of classes and libraries. What is Spring? Spring is an open-source application framework for the Java platform. It is a popular framework for building enterprise Java applications. Spring framework is used to wire different components together. Spring provides modular and flexible architecture which helps developers scalable and maintainable applications. Spring framework plays an important role in the development of large-scale and complex applications. Explain the important features of the…

What is Spring Dependency Injection(DI)? It is the fundamental aspect of the spring framework through which the spring container injects the properties of one object into another object. Every object will have its dependencies or basic requirements. Dependency injection also ensures loose coupling between classes. Advantages of Dependency Injection Loose Coupling: Dependency Injection reduces coupling between components(Objects). Classes are not directly responsible for creating their dependencies. Increased Testability: DI makes it easier to test individual components in isolation. Code Reusability: After injecting dependencies, classes become more modular and can be reused in different contexts. Easy Debugging: Since dependencies are injected…

Java operator are used to perform different operations on program data. In other words we can manipulate data with the help of operators. Following are the different categories of operator. Arithmetic Operators + operator It can be used for addition as well as concatenation. Example: a + b – operator It can be used for subtraction purposes. Example: a – b * operator It can be used for multiplication purposes. Example: a * b / operator It can be used for the division of numbers. Example: a / b % operator It can be used to get the remainder after…

What are Blocks in Java? Blocks are the special type of containers in java language. It acts as a container for executable java statements. Blocks mainly perform special type of operations. e.g. Database connectivity, Server Configuration etc. Blocks are mainly classified into two types: Static Block Non static Block Static Blocks We have to declare static blocks by using static keywords. We use static block mainly to develop business logic where outcome of the logic is same for all the users and it executes only once in a application lifecycle. If java class contains static block and main method then…