技術標籤：javajava

package com.msc.example;
class Personn{
    private String name ;
    private String addr ;
    private String sex ;
    private int age ;
    public Personn() {} ;
    public Personn(String name,String sex) {
        this(name,sex,"",0);
    }
    public Personn(String name,
 
String sex,String addr,int age) {
        this.addr = addr ;
        this.age = age ;
        this.name = name ;
        this.sex = sex ;
    }
    public String  getInfo(){
        return "父類: " + addr +","+age+","+name+","+sex;
    }
}
class Student extends Personn
 
{
    private double math ;
    private double english ;
    public Student(){};
    public Student(String name,String sex){
       super(name,sex) ;
    }
    public Student(String name,String addr,String sex,int age,double math,double english) {
        super(name,addr,sex,age) ;
        this.math =
 
 math ;
        this.english = english ;
    }
    public String  getInfo(){
        return "子類：" + super.getInfo()+","+math+","+english;
    }
}
public class SuccessClass {
    public static void main(String[] args) {
       Personn per = new Student("張三","北京","男",23,36.0,89.0) ;
       System.out.println( per.getInfo());
       per = new Student("張三","男") ;
       System.out.println( per.getInfo());
    }
}

輸出