work/Ellipse.java

package challenge;

import basic.Shape;
import advanced.Resizable;

/**
 * 椭圆形类，实现Shape接口和Resizable接口
 */
public class Ellipse implements Shape, Resizable {
    private String color;
    private double semiMajorAxis; // 长半轴
    private double semiMinorAxis; // 短半轴
    
    /**
     * 构造方法
     * @param color 椭圆形的颜色
     * @param semiMajorAxis 长半轴
     * @param semiMinorAxis 短半轴
     */
    public Ellipse(String color, double semiMajorAxis, double semiMinorAxis) {
        this.color = color;
        this.semiMajorAxis = Math.max(semiMajorAxis, semiMinorAxis); // 确保长半轴不小于短半轴
        this.semiMinorAxis = Math.min(semiMajorAxis, semiMinorAxis);
    }
    
    @Override
    public String getColor() {
        return color;
    }
    
    @Override
    public double getArea() {
        return Math.PI * semiMajorAxis * semiMinorAxis;
    }
    
    @Override
    public void display() {
        System.out.println("Ellipse [color=" + color + ", semiMajorAxis=" + semiMajorAxis + ", semiMinorAxis=" + semiMinorAxis + ", area=" + getArea() + "]");
    }
    
    @Override
    public void enlarge(double factor) {
        if (factor > 0) {
            this.semiMajorAxis *= factor;
            this.semiMinorAxis *= factor;
        }
    }
    
    @Override
    public void shrink(double factor) {
        if (factor > 0 && factor < 1) {
            this.semiMajorAxis *= factor;
            this.semiMinorAxis *= factor;
        }
    }
    
    @Override
    public String getSizeInfo() {
        return "Ellipse with semi-major axis: " + semiMajorAxis + ", semi-minor axis: " + semiMinorAxis + ", area: " + getArea();
    }
    
    /**
     * 获取长半轴
     * @return 长半轴
     */
    public double getSemiMajorAxis() {
        return semiMajorAxis;
    }
    
    /**
     * 设置长半轴
     * @param semiMajorAxis 新的长半轴
     */
    public void setSemiMajorAxis(double semiMajorAxis) {
        this.semiMajorAxis = semiMajorAxis;
    }
    
    /**
     * 获取短半轴
     * @return 短半轴
     */
    public double getSemiMinorAxis() {
        return semiMinorAxis;
    }
    
    /**
     * 设置短半轴
     * @param semiMinorAxis 新的短半轴
     */
    public void setSemiMinorAxis(double semiMinorAxis) {
        this.semiMinorAxis = semiMinorAxis;
    }
    
    /**
     * 设置颜色
     * @param color 新的颜色
     */
    public void setColor(String color) {
        this.color = color;
    }
}