When should I use constructors in Java?

When should I use constructors in Java?

Constructors in Java are used to initialize objects. You should use them when you want to set initial values for object attributes.

Can you give me an example of a constructor?

Sure! Here's a simple example:

public class Car {
    private String model;
    private int year;

    public Car(String model, int year) {
        this.model = model;
        this.year = year;
    }
}

In this example, the constructor initializes the model and year of the Car object.

What happens if I don't use a constructor?

If you don't define a constructor, Java provides a default constructor that initializes object attributes to their default values (e.g., null for objects, 0 for integers). However, you won't be able to set custom initial values.

Are there different types of constructors?

Yes, there are two main types: default constructors (no parameters) and parameterized constructors (with parameters). You can also have multiple constructors in a class, which is called constructor overloading.