다형성class Shape{ String name; double area; void draw() { System.out.println("모양 그리기"); }}class Circle extends Shape{ @Override void draw() { System.out.println("원 그리기"); }}class Rectangle extends Shape{ @Override void draw() { System.out.println("네모 그리기"); }}public class Test { public static void main(String[] args) { Shape[] datas=new Shape[3]; datas[0]=new Shape(); datas[1]=new Circle(); ..