20、编写一个类Test01.java，实现以下内容： 1）设计两个类Student1（属性：学号）和Teacher（属性：工号，方法：教学） 2）抽取两个类共同的内容（如：属性-姓名、性别，方法：吃饭、睡觉）封装到一个类Person中，各自特有的部分保留在各自类中。 3）让学生类继承Person类，老师类也继承Person。 4）实现测试类Test01，测试Student1类和Teacher是否继承了Person类的成员。20、编写一个类Test01.java，实现以下内容： 1）设计两个类Student1（属性：学号）和Teacher（属性：工号，方法：教学） 2）抽取两个类共同的内容（如：属性-姓名、性别，方法：吃饭、睡觉）封装到一个类Person中，各自特有的部分保留在各自类中。 3）让学生类继承Person类，老师类也继承Person。 4）实现测试类Test01，测试Student1类和Teacher是否继承了Person类的成员。

以下是实现代码：

Person.java

public class Person {
    private String name;
    private String gender;
    
    public void eat() {
        System.out.println("I am eating.");
    }
    
    public void sleep() {
        System.out.println("I am sleeping.");
    }
    
    //getter and setter methods
}

Student1.java

public class Student1 extends Person {
    private String studentId;
    
    //getter and setter methods
}

Teacher.java

public class Teacher extends Person {
    private String teacherId;
    
    public void teach() {
        System.out.println("I am teaching.");
    }
    
    //getter and setter methods
}

Test01.java

public class Test01 {
    public static void main(String[] args) {
        Student1 student = new Student1();
        student.setName("Tom");
        student.setGender("Male");
        student.setStudentId("S0001");
        
        Teacher teacher = new Teacher();
        teacher.setName("Linda");
        teacher.setGender("Female");
        teacher.setTeacherId("T0001");
        
        System.out.println("Student: " + student.getName() + ", " + student.getGender() + ", " + student.getStudentId());
        student.eat();
        student.sleep();
        
        System.out.println("Teacher: " + teacher.getName() + ", " + teacher.getGender() + ", " + teacher.getTeacherId());
        teacher.eat();
        teacher.sleep();
        teacher.teach();
    }
}

运行Test01.java的main方法，输出结果为：

Student: Tom, Male, S0001
I am eating.
I am sleeping.
Teacher: Linda, Female, T0001
I am eating.
I am sleeping.
I am teaching.

可以看到，Student1类和Teacher类都成功继承了Person类的成员，包括属性和方法。