Data commit

Task/Constrained-genericity/Kotlin/constrained-genericity.kotlin

@@ -0,0 +1,51 @@
+// version 1.0.6
+
+interface Eatable {
+    fun eat()
+}
+
+class Cheese(val name: String) : Eatable {
+    override fun eat() {
+       println("Eating $name")
+    }
+
+    override fun toString() = name
+}
+
+class Meat(val name: String) : Eatable {
+    override fun eat() {
+       println("Eating $name")
+    }
+
+    override fun toString() = name
+}
+
+class FoodBox<T: Eatable> {
+    private val foodList =  mutableListOf<T>()
+
+    fun add(food: T) {
+        foodList.add(food)
+    }
+
+    override fun toString() = foodList.toString()
+}
+
+fun main(args: Array<String>) {
+    val cheddar =  Cheese("cheddar")
+    val feta = Cheese("feta")
+    val cheeseBox = FoodBox<Cheese>()
+    cheeseBox.add(cheddar)
+    cheeseBox.add(feta)
+    println("CheeseBox contains : $cheeseBox")
+
+    val beef = Meat("beef")
+    val ham = Meat("ham")
+    val meatBox = FoodBox<Meat>()
+    meatBox.add(beef)
+    meatBox.add(ham)
+    println("MeatBox contains : $meatBox")
+
+    cheddar.eat()
+    beef.eat()
+    println("Full now!")
+}