LESSON 181 OF 348 · OBJECT-ORIENTED PROGRAMMING

Creating Objects in Scala in Scala

Lesson

TL ; DR:

An object is an instance of a class — a real, usable copy made from the blueprint.
You create one with the new keyword:
```
Dog rex = new Dog()
```
Each call to new creates a separate object, even if they all come from the same class.

Full lesson:

In the previous lesson you defined the Dog class — the blueprint. But a blueprint isn't a dog. To get an actual dog you can interact with, you need to create an instance of the class. An instance is also called an object.

The new keyword

To create a new object in Java, use the new keyword followed by the class name and parentheses:

Dog rex = new Dog()

What this line does:

new Dog() creates a fresh Dog object on the heap.
Dog rex declares a variable named rex that holds a reference to that object.
The = connects the two — rex now refers to the freshly-created dog.

Many objects from one class

You can call new Dog() as many times as you want, and each call gives you a brand-new, independent object:

Dog rex   = new Dog()
Dog buddy = new Dog()
Dog luna  = new Dog()

rex, buddy, and luna are all Dog objects, but they're different objects. Changing one won't affect the others — they share the blueprint but live their own lives.

Your task

The Dog class is already defined for you. Inside mainFunction, create three separate Dog objects named rex, buddy, and luna. The pre-filled println will confirm:

Created 3 Dog objects

STEP 1 OF 3

Guided

Ctrl + Enter to check