## StarConstructors

### Instructions

We will now add two constructors :

* The default one, with no parameter which inits the properties to the following values :
    * `x` : `0.0`
    * `y` : `0.0`
    * `z` : `0.0`
    * `name` : `"Soleil"`
* The second one take four parameters and sets the values of `name`, `x`, `y` and `z`.

### Usage

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

```java
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 :

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

### Notions

[Class](https://docs.oracle.com/javase/tutorial/java/javaOO/classdecl.html)  
[Property](https://docs.oracle.com/javase/tutorial/java/javaOO/variables.html)