阅读以下说明和Java程序,填写程序中的空(1)~(6),将解答写入答题纸的对应栏内。
【说明】
以下Java代码实现一个简单绘图工具,绘制不同形状以及不同颜色的图形。部分接口、类及其关系如图5-1所示。
【Java代码】
interface DrawCircle { //绘制圆形
public (1);
}
class RedCircle implements DrawCircle {//绘制红色圆形
public void drawCircle(int radius,int x, int y){
System.out.println("Drawing Circle[red,radius:" + radius + ",x:" + x + ",y:" +y+ "]");
}
}
class GreenCircle implements DrawCircle {//绘制绿色圆形
public void drawCircle(int radius, int x, int y) {
System.out.println("Drawing Circle[green,radius:" +radius+ ",x: " +x+ ",y: " +y+ "]");
}
}
abstract class Shape {//形状
protected(2) ;
public Shape(DrawCircle drawCircle) {
this.drawCircle = drawCircle;
}
public abstract void draw();
}
class Circle extends Shape {//圆形
private int x,y,radius;
public Circle(int x,int y,int radius,DrawCircle drawCircle) {
(3) ;
this.x = x;
this.y = y;
this.radius = radius;
}
public void draw() {
drawCircle. (4);
}
}
public class DrawCircleMain {
public static void main(String[] args) {
Shape redCircle=new Circle( 100,100,10,(5));//绘制红色圆形
Shape greenCircle=new Circle(200,200,10,(6) );//绘制绿色圆形
redCircle.draw();
greenCircle.draw();
}
}