关于属性验证问题？ - 黑马程序员技术交流社区

定义1个学生类,有姓名、年龄、手机号码、学号四个属性,要求学生的姓名不能为空串,并且长度不能下于2，否则使其默认值为”无名”, 年龄只能在0-100之间,否则默认值为18，手机号码只能为11位的数字。学号要求为10个数字，否则赋值为默认值”0000000000”.手机号跟学号定义成什么类型好，该怎么验证属性？

public class Student {
String name;
int age;
String ID;
String tel;
public static boolean Check(String str) { //定义一个检测学号和手机号码格式的方法在设置属性的时候调用
for (int i = 0; i < str.length(); i++) {
if ((int) str.charAt(i) < 48 || (int) str.charAt(i) > 57) //检测单个字符是否是数字
return false;
}
return true;
}
public String getName() {
return name;
}
public void setName(String name) {
if (name.length() >= 2) {
this.name = name;
} else {
this.name = "无名";
}
}
public int getAge() {
return age;
}
public void setAge(int age) {
if (age >= 0 && age <= 100) {
this.age = age;
} else {
this.age = 18;
}
}
public String getID() {
return ID;
}
public void setID(String id) {
if (Check(id) && id.length() == 10) { //检测学号
ID = id;
} else {
ID = "0000000000";//设置默认学号
}
}
public String getTel() {
return tel;
}
public void setTel(String tel) {
if (Check(tel) && tel.length() == 11) { //检测手机号码是否符合格式
this.tel = tel;
} else {
this.tel = "00000000000"; //设置默认手机号
}
}
@Override
public String toString() {
// TODO Auto-generated method stub
return "姓名：" + name + "\n年龄：" + age + "\n学号：" + ID + "\n手机号：" + tel
+ "\n";
}
public static void main(String[] args) {
// TODO Auto-generated method stub
Student s1 = new Student();
s1.setName("王小五");
s1.setAge(22);
s1.setID("2010410102");
s1.setTel("18766500050");
System.out.println(s1.toString());
}
}

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static void Main(string[] args)
{
Student student = new Student();
student.Name = "";
student.Age = 12;
student.Tel = "aa";
student.StudentId = "0987";
student.Show();
Console.ReadKey();
}
}
class Student
{
string name;
public string Name
{
get { return this.name; }
set
{
if (value.Length < 2)
{ this.name = "无名"; }
else
{ this.name = value; }
}
}
int age;
public int Age
{
get { return this.age; }
set
{
if (value >= 0 && value <= 100)
{ this.age = value; }
else
{ this.age = 18; }
}
}
string tel;
public string Tel
{
get { return this.tel; }
set
{
if (Check(value) && value.Length == 11)
{ this.tel = value; }
else
{ this.tel = "00000000000"; }
}
}
string studentId;
public string StudentId
{
get { return studentId; }
set
{
if (Check(value) && value.Length == 10)
{ this.studentId = value; }
else
{ this.studentId = "0000000000"; }
}
}
bool Check(string str) //检查手机号和学号的方法
{
bool flag=true;
for (int i = 0; i < str.Length; i++)
{
if (str[i] < 48 || str[i] > 57)
{ flag = false; }
}
return flag;
}
public void Show()
{
Console.WriteLine("name={0},age={1},tel={2},studentId={3}", name, age, tel, studentId);
}
}

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