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56 lines
1.2 KiB
56 lines
1.2 KiB
1 year ago
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## StarConstructors
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### Instructions
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We will now add two constructors :
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* The default one, with no parameter which inits the properties to the following values :
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* `x` : `0.0`
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* `y` : `0.0`
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* `z` : `0.0`
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* `name` : `"Soleil"`
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* The second one take four parameters and sets the values of `name`, `x`, `y` and `z`.
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### Usage
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Here is a possible ExerciseRunner.java to test your function :
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```java
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public class ExerciseRunner {
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public static void main(String[] args) {
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CelestialObject defaultStar = new CelestialObject();
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System.out.println(defaultStar.x);
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System.out.println(defaultStar.y);
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System.out.println(defaultStar.z);
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System.out.println(defaultStar.name);
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CelestialObject earth = new CelestialObject("Terre", 0.43, 0.98, 1.43);
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System.out.println(earth.x);
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System.out.println(earth.y);
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System.out.println(earth.z);
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System.out.println(earth.name);
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}
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}
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```
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and its output :
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```shell
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$ javac *.java -d build
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$ java -cp build ExerciseRunner
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0.0
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0.0
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0.0
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Soleil
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0.43
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0.98
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1.43
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Terre
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$
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```
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### Notions
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[Class](https://docs.oracle.com/javase/tutorial/java/javaOO/classdecl.html)
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[Property](https://docs.oracle.com/javase/tutorial/java/javaOO/variables.html)
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