class Shape{
protected int x,y;
 public void draw(){
System.out.println("Shape Draw");
 }
}

class Rectangle extends Shape{
private int width, height;

 public void setWidth(int w){
width = w;
 }
public void setHeight(int h){
height = h;
 }

public void draw(){
System.out.println("Rectangle Draw");
 }
}

class Triangle extends Shape{
private int base, height;
 public void draw(){
System.out.println("Triangle Draw");
 }
}

class Circle extends Shape{
private int radius;
 public void draw(){
System.out.println("Circle Draw");
 }
}



public class ShapeTest {
private static Shape arrayOfShapes[];
 public static void main(String arg[]){
init();
 drawAll();
 }

public static void init(){
arrayOfShapes = new Shape[3]; ///// 이거 Shape생성자를 넣어주는거잖아. 근데 Shape[3]이 뭐임?? Shape()가 들어가야하는거아님?
 arrayOfShapes[0] = new Rectangle();
 arrayOfShapes[1] = new Triangle();
 arrayOfShapes[2] = new Circle();
 }

public static void drawAll(){
for ( int i = 0 ; i < arrayOfShapes.length; i++){
arrayOfShapes[i].draw();
 }
}
}