/**
 * 美团订单信息
 */
public class MeiTuanOrderInfo extends MaLaTangInfo {
    // 订单名称
    private String orderName;
    // 订单用户名称
    private String userName;

    @Override
    protected String massTaste() {
        String s = super.massTaste();
        return "["+userName+"]的订单["+orderName+"]信息: "+s;
    }

    public String getOrderName() {
        return orderName;
    }

    public void setOrderName(String orderName) {
        this.orderName = orderName;
    }

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }
}

麻辣烫信息：

import java.io.Serializable;

/**
 * 麻辣烫信息(非独家秘方)
 */
public abstract class MaLaTangInfo implements Serializable {

    private Double hotePpper = 1.0; //辣椒 (单位: 两)
    private Double pepper = 1.0; //花椒 (单位: 两)
    private Double salt = 1.0; //咸盐(单位: 两)
    private String taste = "普通";

    // 大众口味
    protected String massTaste() {
        return "辣椒"
                +this.hotePpper + "两,花椒"
                +this.pepper + "两,咸盐"
                +this.salt+"两,口味"+getTaste()
                +";"+featureCheck();
    }

    // 口味判断
    private String getTaste() {
        Double ts = this.hotePpper
                + this.pepper
                + this.salt;
        if (ts > 3.0) {
            return "较重";
        }
        if (ts <= 2.0) {
            return "较轻";
        }
        return taste;
    }

    private String featureCheck(){
        return "\n使用到的Java特性：[口味信息->继承][口味判断->封装]"
                +"[辣椒->"+hotePpperFeature+"]"
                +"[花椒->"+hotePpperFeature+"]"
                +"[盐->"+hotePpperFeature+"]";
    }

    // 三个Feature仅为演示Java特性使用
    private String hotePpperFeature = "继承"; // 辣椒Java特性
    private String pepperFeature = "继承"; // 花椒Java特性
    private String saltFeature = "继承"; // 盐的Java特性

    public Double getHotePpper() {
        return hotePpper;
    }

    public void setHotePpper(Double hotePpper) {
        this.hotePpper = hotePpper;
    }

    public Double getPepper() {
        return pepper;
    }

    public void setPepper(Double pepper) {
        this.pepper = pepper;
    }

    public Double getSalt() {
        return salt;
    }

    public void setSalt(Double salt) {
        this.salt = salt;
    }

    public String getHotePpperFeature() {
        return hotePpperFeature;
    }

    public void setHotePpperFeature(String hotePpperFeature) {
        this.hotePpperFeature = hotePpperFeature;
    }

    public String getPepperFeature() {
        return pepperFeature;
    }

    public void setPepperFeature(String pepperFeature) {
        this.pepperFeature = pepperFeature;
    }


    public String getSaltFeature() {
        return saltFeature;
    }

    public void setSaltFeature(String saltFeature) {
        this.saltFeature = saltFeature;
    }
}

测试类：

public class TestMaLaTang {
    public static void main(String[] args) {
        getOrderInfo("小美", "麻辣烫", 1.0, 1.0, null);
        getOrderInfo("小东", "麻辣烫", 2.0, null, 1.0);
        getOrderInfo("小宝", "麻辣烫", 4.0, 0.0, 0.0);
        getOrderInfo("小讯", "麻辣烫", null, 1.0, 0.0);
    }

    private static void getOrderInfo(String userName, 
                                     String orderName, 
                                     Double hotePpper, 
                                     Double pepper, 
                                     Double salt) {
        MeiTuanOrderInfo meiTuanOrderInfo = new MeiTuanOrderInfo();
        meiTuanOrderInfo.setOrderName(orderName);
        meiTuanOrderInfo.setUserName(userName);
        if(null != hotePpper) {
            meiTuanOrderInfo.setHotePpperFeature("多态");
            meiTuanOrderInfo.setHotePpper(hotePpper);
        }
        if(null != pepper) {
            meiTuanOrderInfo.setPepperFeature("多态");
            meiTuanOrderInfo.setPepper(pepper);
        }
        if(null != salt) {
            meiTuanOrderInfo.setSaltFeature("多态");
            meiTuanOrderInfo.setSalt(salt);
        }
        System.out.println(meiTuanOrderInfo.massTaste()+"\n");
    }

}