Hi Coders!

Ask authors of the task ;) There might be:

public Color color = new Color();

and empty body of default constructor. But authors decided their way: reference "color" is done in constructor.

That's a field. Field objects by default are initialized with a null reference. And keep in mind you do not store an object in color but a reference to a Color object. The constructor then is used to initialize the field like...

//Test class
public class Test {
    //color field, stores references to Object objects
    private Object color;

    //Constructor taking an Object object and assigning it to the color field
    public Test(Object color) {
        this.color = color;
    }
}