java oop : message polymorphism

JavaOOP/src/Java22.java

@@ -0,0 +1,19 @@
+import myObject.Animal;
+import myObject.Cat;
+import myObject.Dog;
+
+public class Java22 {
+    public static void main(String[] args) {
+        // 2. 다형성 배열
+        Animal[] animals = new Animal[2];
+        animals[0] = new Dog();
+        animals[1] = new Cat();
+
+        for (Animal animal : animals) {
+            animal.eat();
+            if (animal instanceof Cat) {
+                ((Cat) animal).say();
+            }
+        }
+    }
+}