3段階目（ポリモーフィズムを体感しよう）

em-oop/src/Day3Check3.java

@@ -0,0 +1,11 @@
+
+public class Day3Check3 {
+	public static void main(String[] args) {
+		Shape shape1 = new Circle(2);
+		shape1.showInfo();
+
+		Shape shape2 = new Rectangle(3, 4);
+		shape2.showInfo();
+	}
+
+}