What is a Constructor in Java? In Java, a constructor is a special type of method that is used to initialize objects. When you create an object of a class, the constructor is called automatically. Its main job is to set the initial values of the object’s properties or perform any setup that the object needs before it can be used. Why Do We Need Constructors? You need constructors because: Initialization : Constructors are responsible for initializing an object when it is created. Automatic Execution : A constructor is automatically called when an object is created, so you don’t have to manually initialize every property. Simplifying Object Creation : It simplifies object creation by providing default values or custom initialization. Where Do Constructors Fit in Java? Constructors fit within a class. They are used whenever a new object of that class is created, and they allow the object to be initialized. Constructors must have the same name as the class, and they don't have a re...
The instanceof operator in Java is used to test whether an object is an instance of a particular class, interface, or a subclass/interface of a given type. It returns a boolean value indicating whether the object on the left-hand side is an instance of the specified type. Syntax: object instanceof type object: The object to be tested. type: The class or interface to check against. Example: class Animal {} class Dog extends Animal {} class Cat extends Animal {} public class InstanceOfExample { public static void main(String[] args) { Animal myDog = new Dog(); Animal myCat = new Cat(); // Using instanceof to check object types System.out.println("Is myDog a Dog? " + (myDog instanceof Dog)); // true System.out.println("Is myDog a Cat? " + (myDog instanceof Cat)); // false System.out.println("Is myCat a Do...