编程题:
定义一个抽象的"Role"类,有姓名,年龄,性别等成员变量
1)要求尽可能隐藏所有变量(能够私有就私有,能够保护就不要公有),
再通过GetXXX()和SetXXX()方法对各变量进行读写。具有一个抽象的play()方法,
该方法不返回任何值,同时至少定义两个构造方法。Role类中要体现出this的几种用法。
2)从Role类派生出一个"Employee"类,该类具有Role类的所有成员(构造方法除外),
并扩展salary成员变量,同时增加一个静态成员变量“职工编号(ID)”。
同样要有至少两个构造方法,要体现出this和super的几种用法,还要求覆盖play()方法,
并提供一个final sing()方法。
3)“Manager"类继承"Employee"类,有一个final成员变量"vehicle”
在main()方法中制造Manager和Employee对象,并测试这些对象的方法。
abstract class Role{
private String name;
private int age;
private String sex;
public abstract void play();
public Role(String name, int age,String sex) {
this.name = name;
this.age = age;
this.sex = sex;
}
public Role(String name, int age) {
this.name = name;
this.age= 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 Employee extends Role{
private int salary;
private static final int ID=10;
public Employee(String name, int age, int salary) {
super(name, age);
this.salary = salary;
}
public Employee(String name, int age, String sex,int salary) {
super(name, age,sex);
this.salary = salary;
}
public void play() {
System.out.println(this.salary);
}
public final void Sing() {
System.out.println("我是final");
}
}
class Manager extends Employee{
public final int vehicle=10;
public Manager(String name, int age, int vehicle) {
super(name, age,vehicle);
}
}
public class Test5{
public static void main(String[] args){
Employee employee=new Employee("zhouyun",89,10000);
employee.play();
Manager manager=new Manager("zhouyun",25,365);
manager.play();
}
}