类与对象的基础题： 1）编程实现：以电话Phone为父类（例：电话有本机号码、打电话、接电话等属性和功能，
class Phone{
private String phonenumber;
public void setPhonenumber(String phonenumber){
this.phonenumber=phonenumber;
}
public String getPhonenumber(){
return phonenumber;
}
public void recCall(){
System.out.println("接到一个电话");
}
public void telCall(){
System.out.println("拨出一个电话");
}
}class Fixedphone extends Phone{
private String phonenumber;//号码是私有，设置为private，不可继承
public void recCall(){
System.out.println("以"+this.phonenumber+"呼出了一个电话"); //重载了父类的recCall
}
}class Cordlessphone extends Fixedphone{
private String phonenumber;
public void info(){
System.out.println("这是无绳电话的信息");
}
}interface Moveable{
public void moveinfo();
}class Mobilephone extends Phone implements Moveable{
private String phonenumber;
public void moveinfo(){
System.out.println("我实现了可移动性");
}
}public class PhoneTest{
public static void main(String a[]){
Phone[] p=new Phone[5];
Phone p1=new Phone();
p1.setPhonenumber("123456789");
p[0]=p1;
Phone p2=new Phone();
p2.setPhonenumber("987654321");
p[1]=p2;
Mobilephone mp=new Mobilephone();
mp.setPhonenumber("11111");
p[2]=mp;
Fixedphone fp=new Fixedphone();
fp.setPhonenumber("22222");
p[3]=fp;
Cordlessphone cp=new Cordlessphone();
cp.setPhonenumber("33333");
p[4]=cp;
for(int i=0;i<p.length;i++){
System.out.println(p[i].getPhonenumber());
} p[4]=p[1];
System.out.println(p[4].getPhonenumber());
}} 写的不是很好，希望对你有帮助噶
//Student 类
class Student{
String name;
int age;
Student(String name,int age){
this.age=age;
this.name=name;
}
Student(){}
public void setName(String name){
this.name=name;
}
public String getName(){
return name;
}
public void setAge(int age){
this.age=age;
}
public int getAge(){
return age;
}
}
//Unergraduate类
class Undergraduate extends Student{
String specially;
Undergraduate(String n,int a,String s){
name = n;
age = a;
specially = s;
}
Undergraduate(){}
public void setSpecially(String specially){
this.specially = specially;
}
public String getSpecially(){
return specially;
}
}
//Postgraduate类
class Postgraduate extends Student{
String studydirection;
Postgraduate(String n,int a,String s){
name = n;
age = a;
studydirection = s;
}
Postgraduate(){}
public void setStudydirection(String studydirection){
this.studydirection = studydirection;
}
public String getStudydirection(){
return studydirection;
}
}
public class TestStudent{ //程序入口
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Student stu1 = new Student("Tom",19);
Student stu2 = new Student("Anna",20);
Postgraduate stu3 = new Postgraduate("John",25,"Computer Science");
Postgraduate stu4 = new Postgraduate("Lucy",24,"Chinese");
Undergraduate stu5 = new Undergraduate("Ansen",21,"Math");
Student[] data = ; //Student类的数组
System.out.println("NameAge");
System.out.println("--------------");
System.out.println(stu1.getName()+""+stu1.getAge());
System.out.println(stu2.getName()+""+stu2.getAge());
System.out.println(stu3.getName()+""+stu3.getAge()+""+stu3.getStudydirection());
System.out.println(stu4.getName()+""+stu4.getAge()+""+stu4.getStudydirection());
System.out.println(stu5.getName()+""+stu5.getAge()+""+stu5.getSpecially());
System.out.println("--------------");
data[0].setName("汤姆");
stu2.setName("约翰");
for(int i=0;i<data.length;i++)
System.out.println(data[i].getName());
}
}
private String phoneNumber;
public abstract void dial();
public abstract void hangup();
}
public class Mobilephone extends Phone {
public void dial() {
//实现
}
public void hangup() {
//实现
}
}
亥俩齐宏：[答案] class Phone{ private String phonenumber; public void setPhonenumber(String phonenumber){ this.phonenumber=... public void moveinfo(){ System.out.println(＂我实现了可移动性＂); } }public class PhoneTest{ public static void main(String a[]){ ...
嘉峪关市17335965036： 1、类与对象的基础题: 1)编程实现:设计一个学生类Student,包含的属性有姓名name和年龄age. 由学生类派 - ？
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嘉峪关市17335965036： 类与对象的基础题: 1)编程实现:以电话Phone为父类(例:电话有本机号码、打电话、接电话等属性和功能, - ？
亥俩齐宏： 期待看到有用的回答!
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