Changes between Version 12 and Version 13 of ControlSystems/SoftwareTeam/Training/GettingStarted/JavaExercises

Timestamp:

Nov 15, 2016, 7:36:34 PM (9 years ago)

Author:

azhang

Comment:

Animal Farm 3

ControlSystems/SoftwareTeam/Training/GettingStarted/JavaExercises

@@ -14 +14 @@
 
 == Another challenge: Animal Farm
-Create an `abstract class` called `Animal` that has a `mass` and a `name`
+Create an `abstract class` called `Animal` that has a `mass` and a `name`. These should be `private`.
 * All animals should have a constructor which gives them a `mass` and a `name` when they are created
 * All animals can `eat` an `amount`, which increases their `mass` by `amount`
 * All animals can also `move` a `distance`, which decreases their `mass` by `distance`
+* All animals can `speak`, but they all speak differently
 * Everybody can use `getName` to get the name of an animal
 * Everybody can use `getMass` to get the mass of an animal
@@ -42 +43 @@
 
 
-== Animal Farm step 2:
+== Animal Farm step 2: Constructor Overloading
 * All animals can also be created with only a `mass`.
 * If an animal is created without a `name`, it's name is set to `Steve` by default.
@@ -56 +57 @@
 
 `Farm` should:
-* Create an array of 5 `Animal` that contains:
+* Create an array of 5 `Animal` called `animals` that contains:
   * 1 `Dog` with `mass` `10`
   * 1 `Dog` with `mass` `15` and `name` `Fido`
   * 1 `Cat` with `mass` `13` and `name` `Cloud`
   * 1 `Hummingbird` with `mass` `1.1`, `name` `Birdie`, and `wingspan` `2.2`
-  * 1 `Dog` with `mass` `5`
+  * 1 `Cat` with `mass` `5`
 * `printInformation` on all `Animal` in the array
+
+Questions to think about:
+* `animals[4]` is a `Hummingbird`, but does `animals[4].getWingspan()` work?
+* How can you get the wingspan of animals[4]?
+
+== Animal Farm step 3: Method Overloading and Overriding
+* All animals can also `eat` other `Animal`, which increases their `mass` by the `mass` of the `Animal` they ate, and sets the `mass` of the `Animal` they ate to `0`.
+Hummingbirds are very small, so they will only `eat` a maximum of their own `mass`.
+* If a Hummingbird with `mass` `1` eats `5`, it will end with a mass of `2`
+* If a Hummingbird with `mass` `2` eats a `Cat` with `mass` `5`, it will end with a mass of `4`, and the `Cat` will end with a `mass` of `0`
+* `mass` and `name` should stay `private`. This may be a bit challenging at first, but be creative!
+* Hint: `super.method()` will run `method()` of the superclass