Java Comparable和Comparator(2)

package com.mwq.comparator;
public class BeautyGirl {
    private int age;
    private Double height;
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    public Double getHeight() {
        return height;
    }
    public void setHeight(Double height) {
        this.height = height;
    }
    @Override
    public String toString() {
        return "美女{年龄：" + this.getAge() + "身高：" + this.getHeight() + "}";
    }
}

package com.mwq.comparator;
import java.util.Comparator;
/**
 * 实现美女的排序
 */
public class BeautyGirlComparator implements Comparator<BeautyGirl> {
    @Override
    public int compare(BeautyGirl girl1, BeautyGirl girl2) {
        // 姑且把年龄放在第一位
        if (girl1.getAge() == girl2.getAge()) {
            return compareHeight(girl1, girl2);
        } else {
            return girl1.getAge() - girl2.getAge();
        }
    }
    private int compareHeight(BeautyGirl girl1, BeautyGirl girl2) {
        // 把身高放在第二位
        return girl1.getHeight().compareTo(girl2.getHeight());
    }
}