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...
Method Overloading in Java Method Overloading is a feature in Java that allows a class to have multiple methods with the same name but different parameter lists. The methods can have a different number or types of parameters. The decision on which method to invoke is made by the compiler based on the arguments provided during the method call. Example: public class Calculator { // Method to add two integers public int add(int a, int b) { return a + b; } // Method to add three integers public int add(int a, int b, int c) { return a + b + c; } // Method to add two doubles public double add(double a, double b) { return a + b; } // Method to concatenate two strings public String concatenate(String str1, String str2) { ...
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