下面是一个存储班级三十名学生基本信息的 Java 代码示例：
创新互联建站于2013年开始，先为济水街道等服务建站，济水街道等地企业，进行企业商务咨询服务。为济水街道企业网站制作PC+手机+微官网三网同步一站式服务解决您的所有建站问题。
import java.util.ArrayList;
public class Student {
private String name;
private int age;
private String gender;
public Student(String name, int age, String gender) {
this.name = name;
this.age = age;
this.gender = gender;
}
public String getName() {
return name;
}
public int getAge() {
return age;
}
public String getGender() {
return gender;
}
}
public class Classroom {
private ArrayListStudent students;
public Classroom() {
this.students = new ArrayListStudent();
}
public void addStudent(Student student) {
students.add(student);
}
public ArrayListStudent getStudents() {
return students;
}
}
public class Main {
public static void main(String[] args) {
Classroom classroom = new Classroom();
// 添加 30 名学生的基本信息
classroom.addStudent(new Student("Tom", 18, "Male"));
classroom.addStudent(new Student("Alice", 19, "Female"));
// ...
// 此处省略 28 名学生的信息
// 获取所有学生的信息
ArrayListStudent students = classroom.getStudents();
for (Student student : students) {
System.out.println("Name: " + student.getName());
System.out.println("Age: " + student.getAge());
System.out.println("Gender: " + student.getGender());
}
}
}
该代码定义了两个类：Student 类表示一个学生，包含了学生的姓名、年龄和性别等信息；Classroom 类表示一个班级，包含了一个学生的列表，并提供了添加学生和获取学生列表的方法。
在 Main 类的 main 方法中，我们首先实例化一个 Classroom 对象，然后依次添加 30 名学生的信息。最后，我们调用 getStudents 方法获取所
学生类:
public class Student{
private String name;
private int age;
private double score;
public dd(String name, int age, double score) {
super();
this.name = name;
this.age = age;
this.score = score;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public double getScore() {
return score;
}
public void setScore(double score) {
this.score = score;
}
public void printInfo()
{
System.out.println("name:"+name);
System.out.println("age:"+age);
System.out.println("score:"+score);
}
} main() 方法：public class TestStudent{
public static void main(String[] args) {
Student stu=new Student("李四",20,89);
stu.printInfo();
}} 友情提示：考试的题目还是应该自己做，尽管就是做错了，那对自己还是很有帮助的
如果不多的话就直接修改 要更新就 update table set id='19'+substring(id,1,4)+'00'+substring(id,5,3)
import java.util.ArrayList;
import java.util.Scanner;import com.sun.org.apache.xpath.internal.Arg;
public class Student {
//两个私有属性
private int no ;
private String name ;
//默认构造函数
public Student(){}
//带参构造函数
public Student(int no,String name){
this.no=no;
this.name=name;
}
//添加学生信息
public void addStudentInfo(ArrayList list){
String flag1="yes";
do{
Student student=new Student();
Scanner in =new Scanner(System.in);
System.out.println("请输入学生学号：");
student.setNo(in.nextInt());
System.out.println("请输入学生姓名：");
student.setName(in.next());
list.add(student);
System.out.println("是否继续添加学生信息(yes/no)?");
flag1=in.next();
} while(flag1.equals("yes"));
}
//读取学生信息
public void showStudentInfo(ArrayListStudent list){
System.out.println(" 学生no： "+" 学生name: ");
for(Student student:list){
System.out.println(" "+student.getNo()+" "+student.getName());
}
}
public int getNo() {
return no;
}
public void setNo(int no) {
this.no = no;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public static void main(String arg[]) {
ArrayListStudent studentList= new ArrayListStudent();
Student student= new Student();
Scanner inn= new Scanner(System.in);
while(true){
System.out.println("----------------- 欢迎使用学生管理系统------------------");
System.out.println("1.输入学生信息");
System.out.println("2.显示学生信息");
System.out.println("0.退出系统");
System.out.println("请选择....");
int nn= inn.nextInt();
switch (nn) {
case 1:
student.addStudentInfo(studentList);
break;
case 2:
System.out.println("学生信息如下：");
student.showStudentInfo(studentList);
break;
case 0:
System.exit(0);
System.out.println("系统退出！");
break;
default:
break;
}
}
} }
lListStudent students = new ArrayListStudent();
BufferedReader br = new BufferedReader(new FileReader("D:\student.txt"));
String tmpStr = br.readLine();
while(tmpStr != null){
int firstIndex = tmpStr.indexOf(" ");
int secondIndex = tmpStr.indexOf(" ",firstIndex + 1);
int thirdIndex = tmpStr.indexOf(" ", secondIndex + 1);
int forthIndex = tmpStr.indexOf(" ", thirdIndex + 1);
Integer stuId = Integer.parseInt(tmpStr.substring(0,firstIndex));
String stuName = tmpStr.substring(firstIndex + 1,secondIndex);
Integer stuYW = Integer.parseInt(tmpStr.substring(secondIndex + 1,thirdIndex));
Integer stuSX = Integer.parseInt(tmpStr.substring(thirdIndex + 1,forthIndex));
Integer stuYY = Integer.parseInt(tmpStr.substring(forthIndex + 1));
Student student = new Student();
student.setStuId(stuId);
student.setStuName(stuName);
student.setStuYW(stuYW);
student.setStuSX(stuSX);
student.setStuYY(stuYY);
students.add(student);
tmpStr.readLine();
}
//创建一个学生实体类 封装stuId stuName stuYW stuSx stuYY 这5个属性。。。
//已经帮你把数据拆分出来 并以Student 对象的形式放入集合中了 接下来 给分吧 哇咔咔
跑这儿作家庭作业了？ 如果连用哪种页面技术都不知道提的话，恐怕别人给你源代码你也看不懂哦，想想别人给你个tapestry、Wicket之类的写的代码，拿给老师肯定挨批的哟（一看就露馅了）。
