public/subjects/java/piscine/StarConstructors

StarConstructors

Instructions

We will now add two constructors :

• The default one, with no parameters which initialises the properties with following values :
  • x : 0.0
  • y : 0.0
  • z : 0.0
  • name : "Soleil"
• The second one takes four parameters and sets the values of name, x, y and z.

Usage

Here is a possible ExerciseRunner.java to test your function :

public class ExerciseRunner {

    public static void main(String[] args) {
        CelestialObject defaultStar = new CelestialObject();
        System.out.println(defaultStar.x);
        System.out.println(defaultStar.y);
        System.out.println(defaultStar.z);
        System.out.println(defaultStar.name);

        CelestialObject earth = new CelestialObject("Terre", 0.43, 0.98, 1.43);
        System.out.println(earth.x);
        System.out.println(earth.y);
        System.out.println(earth.z);
        System.out.println(earth.name);
    }
}

and its output :

$ javac *.java -d build
$ java -cp build ExerciseRunner 
0.0
0.0
0.0
Soleil
0.43
0.98
1.43
Terre
$ 

Notions

Class
Property