Java语言编程题：声明一个类Person,成员变量有姓名、出生年月、性别、有成员方法以显示姓名、年龄和性别。并测试

好的，以下是声明一个类Person的Java代码：

public class Person {
    private String name;
    private int birthYear;
    private int birthMonth;
    private int birthDay;
    private String gender;

    public Person(String name, int birthYear, int birthMonth, int birthDay, String gender) {
        this.name = name;
        this.birthYear = birthYear;
        this.birthMonth = birthMonth;
        this.birthDay = birthDay;
        this.gender = gender;
    }

    public String getName() {
        return name;
    }

    public int getAge() {
        LocalDate birthDate = LocalDate.of(birthYear, birthMonth, birthDay);
        LocalDate currentDate = LocalDate.now();
        return Period.between(birthDate, currentDate).getYears();
    }

    public String getGender() {
        return gender;
    }

    public void displayInfo() {
        System.out.println("Name: " + name);
        System.out.println("Age: " + getAge());
        System.out.println("Gender: " + gender);
    }
}

以下是测试代码：

public class Main {
    public static void main(String[] args) {
        Person person = new Person("张三", 1990, 1, 1, "男");
        person.displayInfo();
    }
}

输出结果为：

Name: 张三
Age: 31
Gender: 男