1 题目
编写程序实现如下功能：已知Person类包含三个公共域变量（姓名、性别、年龄）和一个构造方法，Student类是Person类的派生类，包含两个新的公共域变量(学号、班号)、两个公共方法（修改年龄、显示基本信息）及一个构造方法。定义一组学生对象，并初始化他们的基本信息，然后依次输出。
2 源代码
Preson.java
/*实现person类*/public class Person {public String name; public char sex; public int age;Person(String name,char sex,int age){this.name = name;this.sex = sex;this.age = age;}}
Student.java
/*实现Student类*/public class Student extends Person{public String classno; public String sno;//构造函数Student(String sno,String classno,String name,char sex, int age){super(name,sex,age);this.classno = classno;this.sno = sno;}//更新学生的年龄信息void updateAge(int age){this.age = age;}//输出学生信息void print(){System.out.println("学生信息：" + '\n');System.out.println(" " + "学号" + " " + "班号" + "" + "姓名" + " " + "性别" + " " + "年龄" + '\n');System.out.println(this.sno + " " + this.classno + "" + this.name + " " + this.sex + " " + this.age + '\n');} }
TestStudentPerson.java
public class TestStudentPerson {public static void main(String[] args) {char i;Student student[] = new Student[6];//定义一个数组//对数组里面的元素进行初始化student[0] = new Student("04166051","电信1702班","Boly",'Y',18);student[1] = new Student("04166052","电信1702班","Lily",'X',18);student[2] = new Student("04166053","电信1702班","Bob",'X',19);student[3] = new Student("04166054","电信1702班","Tom",'Y',19);student[4] = new Student("04166055","电信1702班","Jack",'Y',18);student[5] = new Student("04166056","电信1702班","Roly",'Y',19);//显示各学生信息for(i = 0;i < 6;i++){student[i].print();}}}
