Question

JAVA编程题，急求呀。。。高手帮下忙

编程完成下面功能：
1，定义一个person类
成员变量:name,age
成员方法：showInfo(),用来显示person对象的内容
至少两个构造方法（有参，无参）用于给name和age初始化
2，再定义一个Student类，继承Person类
成员变量id,department
成员方法：showInfo(),该方法覆盖Person类中的showInfo()方法
至少两个构造方法（带参，无参），用于给id,department,name,age初始化
3，定义一个测试类TestStudent,分别生成Person对象和Student对象，显示结果。

Answer 1

public class Person {
public String name;
public int age;
public void showInfo(){
System.out.println(name+","+age);
}
public Person(){}
public Person(String name, int age) {
this.name = name;
this.age = age;
}
}

public class Student extends Person{
public int id;
public String department;
public void showInfo() {
System.out.println(id+","+department+","+name+","+age);
}
public Student() {
}
public Student(int id, String department,String name,int age) {
this.id = id;
this.department = department;
super.name=name;
super.age=age;
}
public static void main(String[] args) {
Person p=new Person("张三",22);
Student s=new Student(1,"销售部","李四",23);
p.showInfo();
s.showInfo();
}
}

Answer 2