#4.3 Java Tutorial | Constructor Example

Whenever you see round brackets in Java, it simply means that it is a method. Constructor: A constructor is a block of codes similar to the method. It is called when an instance of the class is created. It is a special type of method that is used to initialize the object. -Whenever you create an object by saying new calc that calc and bracket is a constructor. Constructor is very important when you create an object. To call the constructor, we follow the syntax: Calc obj= new Calc(); By default, java gives you one constructor for the class with no parameters as it gives for Calc. The constructor with Java allocates the memory, thus it is used for allocating the memory. Java calls a default constructor if there is no constructor available in the class. We can also define our own constructors. We can also have two constructors in the same class provided they have a different signature. While creating an object if you pass a value, it will call that particular constructor which takes a value of its data type and it will assign that value to the constructor. You have to match the parameters as the number of values you are passing. The syntax for defining constructor: public Calc() { } Point to remember about constructor: Constructor has the same name as a class name. Constructor does not return anything, so we do not specify the return type in a constructor. We do not need to call the constructor, it will be called automatically when the object is created. Types of Constructors: A constructor with parameters is known as a Parameterized constructor. A contructor with no parameters that are given by Java is known as a Default constructor. In this video we will see : What is constructor Example of Constructor How to create constructor Default constructor Characteristics of Constructor Assigning value through constructor Parameterized Constructor Constructor overloading Check out our courses: AI Powered DevOps with AWS - Live Course :- https://go.telusko.com/AIDevOps-AWS Coupon: TELUSKO10 (10% Discount) Complete Java Developer Course Batch-4: https://go.telusko.com/Complete4 Coupon: TELUSKO10 (10% Discount) Master Java Spring Development : https://go.telusko.com/masterjava Coupon: TELUSKO20 (20% Discount) Instagram :   / navinreddyofficial   Linkedin :   / navinreddy20   Discord :   / discord   More Learning : Java - https://bit.ly/3xleOA2 Python :- https://bit.ly/3H0DYHx Django :- https://bit.ly/3awMaD8 Spring Boot :- https://bit.ly/3aucCgB Spring Framework :- https://bit.ly/3GRfxwe Servlet & JSP :- https://bit.ly/3mh5CGz Hibernate Tutorial :- https://bit.ly/3NWAKah Rest API | Web Service Tutorial :- https://bit.ly/38RJCiy Git :- https://bit.ly/3NUHB3V JavaScript :- https://bit.ly/3mkcFys Kotlin :- https://bit.ly/3GR2DOG Donation: PayPal Id : navinreddy20 Patreon : navinreddy20 http://www.telusko.com/contactus