work/Circle.java

package challenge;

import basic.Shape;
import advanced.Resizable;

/**
 * 圆形类，实现Shape接口和Resizable接口
 */
public class Circle implements Shape, Resizable {
    private String color;
    private double radius;
    
    /**
     * 构造方法
     * @param color 圆形的颜色
     * @param radius 圆形的半径
     */
    public Circle(String color, double radius) {
        this.color = color;
        this.radius = radius;
    }
    
    @Override
    public String getColor() {
        return color;
    }
    
    @Override
    public double getArea() {
        return Math.PI * radius * radius;
    }
    
    @Override
    public void display() {
        System.out.println("Circle [color=" + color + ", radius=" + radius + ", area=" + getArea() + "]");
    }
    
    @Override
    public void enlarge(double factor) {
        if (factor > 0) {
            this.radius *= factor;
        }
    }
    
    @Override
    public void shrink(double factor) {
        if (factor > 0 && factor < 1) {
            this.radius *= factor;
        }
    }
    
    @Override
    public String getSizeInfo() {
        return "Circle with radius: " + radius + ", area: " + getArea();
    }
    
    /**
     * 获取半径
     * @return 半径
     */
    public double getRadius() {
        return radius;
    }
    
    /**
     * 设置半径
     * @param radius 新的半径
     */
    public void setRadius(double radius) {
        this.radius = radius;
    }
    
    /**
     * 设置颜色
     * @param color 新的颜色
     */
    public void setColor(String color) {
        this.color = color;
    }
}