5月16日三个作业

作业1：

package MyPackage;
class book {
private String name;
private double price;
public book(String name,double price){
this.name=name;
this.price=price;
}
    public void setName(String name){
    this.name=name;;
    }
    public void setPrice(double price){
    this.price=price;;
    }
    public String getName(){
    return name;
    }
    public double getPrice(){
    return price;
    }
    public String toString(){
    return "name="+name+"\nprice="+price;
    }
}
class Textbook2{
public static void main (String[] args) {
book book1=new book("Prison Break",500);
book1.setName("Prison Break");
System.out.println(book1.getName());
System.out.println(book1.toString());
}

}

作业2：
abstract class Person {
  abstract void display();
  abstract void display1();
}
class Student extends Person{
String name;
int number;
int score;
public void display(){
name="Barbelo";
number=1010;
score=100;
}
public void display1(){
System.out.print("学生姓名："+name+"\n学号："+number+"\n成绩："+score);
}  
}
class TestStudent{
public static void main (String[] args) {
Person a=new Student();
a.display();
a.display1();

}
}

作业3：
interface Person {
  abstract void display();
  abstract void display1();
}
class Teacher implements Person{
String name;
String project;
int money;
public void display(){
name="Barbelo";
project="Math";
money=3000;
}
public void display1(){
System.out.print("教师姓名："+name+"\n课程："+project+"\n工资："+money);
}  
}
class TestStudent{
public static void main (String[] args) {
Person a=new Teacher();
a.display();
a.display1();

}
}