[Java知识库]熟悉继承（java）

package Cai;

import java.util.Scanner;
class Person{//子类的使用
    private String name;
    private char sex;
    private String id;
    private String phone;
    private String email;
    public Person()
    {
        name="wang";
        sex='女';
        id="10220202";
        phone="123456";
        email="qq.com";

    }
    public Person(String name,char sex,String id,String phone,String email)
    {
        this.name=name;
        this.sex=sex;
        this.id=id;
        this.phone=phone;
        this.email=email;

    }
    public String getId()
    {
        return id;
    }
    public void setEmail(String email)
    {
        this.email=email;
    }
    public void setPhone(String phone)
    {
        this.phone=phone;
    }
    public String toString1()
    {
        return name+" "+sex+" "+id+" "+phone+" "+email;
    }

}
class Student extends Person
{
    private long sNo;
    private String sClass;
    public Student()
    {};
    public Student(String name,char sex,String id,String phone,String email,long sNo)
    {
        super(name,sex,id,phone,email);//父类构造函数形参
        this.sNo=sNo;

    }

    public void setClass(String sClass)
    {
        this.sClass=sClass;
    }
    public String toString()
    {
        super.toString();//调用父类的函数
        return"学号"+sNo+" "+"班级"+sClass;
    }



}
public class Math {
    public static void main(String[] args) {

        Scanner input=new Scanner(System.in);
        Student s1=new Student("刘德华",'男',"2203319","8807","gzdx@126",2000802);
        s1.setClass("1班");
        System.out.println(s1.toString1());
        System.out.println(s1.toString());





    }
}