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; //私有属性
private int age;
private String sex;
public String info ="i am dad!";
public String getName(){
return ;
}
public void setName(String name){
= name;
}
public int getAge(){
return ;
}
public void setAge(int age){
= age;
}
public String getSex(){
return ;
}
public void setSex(String sex){ //set get方法
= sex;
}
public abstract void play(); //抽象方法
public Role(String name,int age,String sex){
= name;
= age;
= sex;
}
}
class Employee extends Role{ //继承
private double salary; //私有属性
private static String ID;
public String info = "i am son!";
public double getSalary(){
return ;
}
public void setSalary(double salary){
= salary;
}
public String getID(){
return ;
}
public void setID(String id){
= id;
}
public Employee(String name,int age,String sex,double salary,String ID){
super(name,age,sex);
= salary;
= ID;
}
public void play(){
();
();
}
final void sing(){
("name:"+()+
"\nsex:"+()+
"\nage:"+()+
"\nsalary:"+());
}
}
class Manager extends Employee{ //继承
final String vehicle;
public Manager(String name,int age,String sex,double salary,String ID,String vehicle){
super(name,age,sex,salary,ID);
= "自行车";
}
}
public class TestAbstract{ //主方法
public static void main(String[] args) {
Employee e = new Employee("GOGING",26,"男",9000,"010");
();
();
Manager m = new Manager("cleavlove",24,"男",10000,"001"," ");
();
();
("\n\n\n");
}
}