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定义一个Person类，含姓名、性别、年龄、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、入学时间、专业等字段。定义各类的构造方法和toString()方法，并分别创建对象进行测试。
public class Persons {
public static void main(String[] args) {
Teacher A = new Teacher("张三", "男", 35, "教授", "教学");
Student B = new Student("李四", "男", 20, 123, 201809, "computer");
System.out.println(A.toString());
System.out.println(B.toString());
}
}
class Person {
private String name;
private String sex;
private int age;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
}
class Teacher extends Person {
String zhicheng;
String bumen;
public Teacher(String name, String sex, int age, String zhicheng, String bumen) {
this.setName(name);
this.setSex(sex);
this.setAge(age);
this.zhicheng = zhicheng;
this.bumen = bumen;
}
public String toString() {
return "姓名：" + this.getName() +
"，性别：" + this.getSex() +
"，年龄：" + this.getAge() +
"，职称：" + this.zhicheng +
"，部门：" + this.bumen;
}
}
class Student extends Person {
int num;
int time;
String zhuanye;
public Student(String name, String sex, int age, int num, int time, String zhuanye) {
this.setName(name);
this.setSex(sex);
this.setAge(age);
this.num = num;
this.time = time;
this.zhuanye = zhuanye;
}
public String toString() {
return "姓名：" + this.getName() +
"，性别：" + this.getSex() +
"，年龄：" + this.getAge() +
"，学号：" + this.num +
"，入学时间：" + this.time +
"，专业：" + this.zhuanye;
}
}
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