How does a default constructor work in Java?

In both Java and C#, a “default constructor” refers to a nullary constructor that is automatically generated by the compiler if no constructors have been defined for the class. The default constructor implicitly calls the superclass’s nullary constructor, then executes an empty body .

When a class has only the default constructor, the class’s instance variables are initialized to their default values . In Section 8.5, you’ll learn that classes can have multiple constructors.

What is a default constructor? A default constructor is a constructor created by the compiler if we do not define any constructor(s) for a class. Here is an example: public class Student { String firstName; String lastName; int age; public static void main(String args[]) { Student myStudent = new Student(); myStudent .13 Oca 2022

7 Answers. Implicitly defined (by the compiler) default constructor of a class does not initialize members of built-in types . However, you have to keep in mind that in some cases the initialization of a instance of the class can be performed by other means.

Here, we haven’t created any constructors. Hence, the Java compiler automatically creates the default constructor. The default constructor initializes any uninitialized instance variables with default values. … Example 5: Default Constructor. TypeDefault ValueobjectReference nullJava Constructors (With Examples) – Programiz www.programiz.com › java-programming › constructors