What are constructors in Java?

Question

Accepted Answer

Constructors are special methods in Java that are used to initialize objects when they are created. A constructor is automatically invoked when an object is instantiated and helps assign initial values to object properties.

Key Points:
• A constructor has the same name as the class.
• It does not have a return type, not even void.
• Constructors are automatically called when an object is created using the new keyword.
• Java supports default constructors and parameterized constructors.
• Constructors can be overloaded to initialize objects in different ways.

Example:
When creating a Student object, a constructor can initialize properties such as name and age at the time of object creation.

Code Example:

```
class Student {

String name;

Student(String name) {
        this.name = name;
    }
}

public class Main {
    public static void main(String[] args) {
        Student student = new Student("Amol");
        System.out.println(student.name);
    }
}
```
Interview Tip:
A concise interview answer is:

"A constructor is a special method used to initialize an object. It has the same name as the class, does not have a return type, and is automatically called when an object is created."