Java Animal Reserve项目功能实现及代码bug排查求助

核心问题修复思路 #

• 对象输出仅显示内存地址：为Dog、Monkey实体类重写toString()方法，自定义需要打印的属性即可解决
• intakeNewMonkey方法缺失逻辑：补充物种合法性校验、Monkey实例化、实例加入monkeyList的逻辑，同时修复nextBoolean()执行后换行符残留导致后续输入读取为空的问题
• reserveAnimal方法逻辑错误：补充服务国家筛选逻辑，删除if判断后的多余分号修复筛选失效问题，调整狗列表筛选逻辑为输出未预留的可预约动物
• printAnimals方法未实现：补充方法入参listType，按需求实现三个输出分支，其中available分支合并输出两类动物中已完成训练且未被预留的个体

修复后代码示例 #

实体类toString方法示例（Monkey类逻辑一致） #

// 放在Dog类内部
@Override
public String toString() {
    return "Dog{" +
            "名称='" + name + '\'' +
            ", 训练状态='" + trainingStatus + '\'' +
            ", 采集国家='" + acquisitionCountry + '\'' +
            ", 是否预留=" + reserved +
            '}';
}

intakeNewMonkey方法 #

public static void intakeNewMonkey(Scanner scanner) {
    // 定义允许录入的物种列表，可根据需求调整
    List<String> allowedSpecies = Arrays.asList("猕猴", "金丝猴", "黑猩猩", "长臂猿");
    System.out.println("What is the new monkey's name?");
    String name = scanner.nextLine();
    for (Monkey monkey: monkeyList) {
        if(monkey.getName().equalsIgnoreCase(name)) {
            System.out.println("\n\nThis monkey is already in our system.\n\n");
            return;
        }
    }
    System.out.println("What is the monkey's tail length?");
    String tailLength = scanner.nextLine();
    
    System.out.println("What is the monkey's gender?");
    String gender = scanner.nextLine();
    
    System.out.println("What is the monkey's age?");
    String age = scanner.nextLine();
    
    System.out.println("What is the monkey's weight?");
    String weight = scanner.nextLine();
    
    System.out.println("What is the monkey's acquisition date?");
    String acquisitionDate = scanner.nextLine();
    
    System.out.println("What is the monkey's acquisition country?");
    String acquisitionCountry = scanner.nextLine();
    
    System.out.println("What is the monkey's training status?");
    String trainingStatus = scanner.nextLine();
    
    System.out.println("Is the monkey reserved? <enter true or false>");
    boolean reservedBoolean = scanner.nextBoolean();
    // 吃掉nextBoolean残留的换行符，避免后续nextLine读取为空
    scanner.nextLine();
    
    System.out.println("What is the monkey's service country?");
    String serviceCountry = scanner.nextLine();
    
    System.out.println("What is the monkey's body length?");
    String bodyLength = scanner.nextLine();
    
    System.out.println("What is the monkey's height?");
    String height = scanner.nextLine();
    
    System.out.println("What is the monkey's species?");
    String species = scanner.nextLine();
    // 物种合法性校验
    if (!allowedSpecies.contains(species)) {
        System.out.println("\n\n不允许录入该物种的猴子\n\n");
        return;
    }
    // 实例化Monkey，构造方法参数根据实际定义调整
    Monkey newMonkey = new Monkey(name, tailLength, gender, age, weight, acquisitionDate, acquisitionCountry, trainingStatus, reservedBoolean, serviceCountry, bodyLength, height, species);
    // 加入列表
    monkeyList.add(newMonkey);
    System.out.println("猴子录入成功");
}

reserveAnimal方法 #

public static void reserveAnimal(Scanner scanner) {
    System.out.println("Enter animal type");
    String type = scanner.nextLine();
    System.out.println("Enter service country");
    String serviceCountry = scanner.nextLine();

    if (type.equalsIgnoreCase("Monkey")) {
        System.out.println("当前可预约的猴子列表：");
        for (int i = 0; i < monkeyList.size(); i++) {
            Monkey monkey = monkeyList.get(i);
            // 筛选未预留且服务国家匹配的个体
            if (!monkey.getReserved() && monkey.getServiceCountry().equalsIgnoreCase(serviceCountry)) {
                System.out.println(monkey);
            }
        }
        System.out.println("Enter name: ");
        String name = scanner.nextLine();
        for (Monkey obj: monkeyList) {
            if (obj.getName().equalsIgnoreCase(name)) {
                obj.setReserved(true);
                System.out.println("猴子预约成功");
                return;
            }
        }
        System.out.println("Monkey not found in list");
    }
    if (type.equalsIgnoreCase("Dog")) {
        System.out.println("当前可预约的狗列表：");
        for (int i = 0; i < dogList.size(); i++) {
            Dog dog = dogList.get(i);
            // 筛选未预留且服务国家匹配的个体
            if (!dog.getReserved() && dog.getServiceCountry().equalsIgnoreCase(serviceCountry)) {
                System.out.println(dog);
            }
        }
        System.out.println("Enter name: ");
        String name = scanner.nextLine();
        for (Dog obj: dogList) {
            if (obj.getName().equalsIgnoreCase(name)) {
                obj.setReserved(true);
                System.out.println("狗预约成功");
                return;
            }
        }
        System.out.println("Dog not found in list");
    }
}

printAnimals方法 #

// 补充listType入参，由菜单调用时传入
public static void printAnimals(String listType) {
    if ("dog".equalsIgnoreCase(listType)) {
        System.out.println("===== 狗列表 =====");
        for (Dog dog : dogList) {
            System.out.println(dog);
        }
    } else if ("monkey".equalsIgnoreCase(listType)) {
        System.out.println("===== 猴子列表 =====");
        for (Monkey monkey : monkeyList) {
            System.out.println(monkey);
        }
    } else if ("available".equalsIgnoreCase(listType)) {
        System.out.println("===== 可预约动物列表（已完成训练且未预留） =====");
        // 输出符合条件的狗
        for (Dog dog : dogList) {
            if ("in service".equalsIgnoreCase(dog.getTrainingStatus()) && !dog.getReserved()) {
                System.out.println(dog);
            }
        }
        // 输出符合条件的猴子
        for (Monkey monkey : monkeyList) {
            if ("in service".equalsIgnoreCase(monkey.getTrainingStatus()) && !monkey.getReserved()) {
                System.out.println(monkey);
            }
        }
    } else {
        System.out.println("无效的列表类型");
    }
}

内容的提问来源于stack exchange，提问作者Kolgrim17