java oop : interface

JavaOOP/src/Java23.java

@@ -0,0 +1,19 @@
+import poly.Animal;
+import poly.Cat;
+import poly.Dog;
+
+public class Java23 {
+    public static void main(String[] args) {
+        // 추상클래스
+        // Animal animal = new Animal; (X)
+        // upcasting 으로 활용
+        Animal cat = new Cat();
+        Animal dog = new Dog();
+
+        cat.eat();
+        cat.move();
+
+        dog.eat();
+        dog.move();
+    }
+}