利用Java代码定义一个person类，包含姓名、性别、年龄等字段；继承person类，设计teacher类，增加：职称、部门等字段；继承person类设计Student类增加，学号、班级等字段，定义各类的构造方法和to String()方法，并分贝创建对象进行测试

好的，请稍等。以下是Java代码：

public class Person {
    private String name;
    private String gender;
    private int age;

    public Person(String name, String gender, int age) {
        this.name = name;
        this.gender = gender;
        this.age = age;
    }

    public String toString() {
        return "Name: " + name + ", Gender: " + gender + ", Age: " + age;
    }
}

public class Teacher extends Person {
    private String title;
    private String department;

    public Teacher(String name, String gender, int age, String title, String department) {
        super(name, gender, age);
        this.title = title;
        this.department = department;
    }

    public String toString() {
        return super.toString() + ", Title: " + title + ", Department: " + department;
    }
}

public class Student extends Person {
    private String studentID;
    private String className;

    public Student(String name, String gender, int age, String studentID, String className) {
        super(name, gender, age);
        this.studentID = studentID;
        this.className = className;
    }

    public String toString() {
        return super.toString() + ", Student ID: " + studentID + ", Class Name: " + className;
    }
}

// 测试代码

public static void main(String[] args) {
    Person person = new Person("Alice", "Female", 25);
    System.out.println(person);

    Teacher teacher = new Teacher("Bob", "Male", 35, "Professor", "Computer Science");
    System.out.println(teacher);

    Student student = new Student("Charlie", "Male", 18, "123456", "Class A");
    System.out.println(student);
}

这个代码定义了一个Person类，然后分别继承了这个类来设计Teacher和Student类。每个类都有自己的构造方法和toString()方法，用于创建对象和输出对象属性。在测试代码中，我们创建了一个Person对象，一个Teacher对象和一个Student对象，并将它们的属性打印到控制台上。