Why do i need two classes here:

Question

public class Animal {
void bark() {
System.out.println("Woof-Woof");
}
}

class MyClass {
public static void main(String[ ] args) {
Animal dog = new Animal();
dog.bark();
}
}

Answer 1

you don't need 2 classes for that, You can create main method in Animal class only with Animal object.
But 2 classes is best way to understand OOP'S

Answer 2

You are using myClass to test Animal class everything looks good