java关于多态的题_Java基础之：OOP——多态练习题

Java基础之：OOP——多态练习题

应用案例1：

编写教师类

要求有属性“姓名name”，“年龄age”，“职称post”，“基本工资salary”

编写业务方法， introduce()，实现输出一个教师的信息。

编写教师类的三个子类：教授类(professor)、副教授类(vice professor)、讲师类(lecturer)。

工资级别分别为：教授为1.3、副教授为1.2、讲师类1.1。在三个子类里面都重写父类的introduce()方法。

定义并初始化一个老师对象，调用业务方法，实现对象基本信息的后台打印。

package polymorphic_HomeWork;

public class WorkTest_01 {

public static void main(String[] args) {

Teacher professor = new Professor("小范",20,"professor",4000.0);

Teacher viceProfessor = new ViceProfessor("小黄",18,"ViceProfessor",3000.0);

Teacher lecturer = new Lecturer("小雨",19,"lecturer",2000.0);

System.out.println(professor.introduce());

System.out.println(viceProfessor.introduce());

System.out.println(lecturer.introduce());

}

}

//要求有属性“姓名name”，“年龄age”，“职称post”，“基本工资salary”，

//编写业务方法， introduce()，实现输出一个教师的信息。

class Teacher{

private String name;

private int age;

private String post;

private double salary;

public Teacher(String name, int age, String post, double salary) {

super();

this.name = name;

this.age = age;

this.post = post;

this.salary = salary;

}

public Teacher() {

super();

}

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 getPost() {

return post;

}

public void setPost(String post) {

this.post = post;

}

public double getSalary() {

return salary;

}

public void setSalary(double salary) {

this.salary = salary;

}

//introduce()，实现输出一个教师的信息。

public String introduce() {

return "Teacher [name=" + name + ", age=" + age + ", post=" + post ;

}

}

//教授类(professor)

class Professor extends Teacher{

private double level;

public Professor(String name, int age, String post, double salary) {

super(name, age, post, salary);

this.level = 1.3;

}

public double getLevel() {

return level;

}

public void setLevel(double level) {