public class Student {
private String no; //学号(长度为6位)
private String name; //姓名
private String idCard; //证件号(18位)
private int sex; //性别(男(1)/女(0))
private int age; //年龄(1-100)
public Student(){}
public Student(String no, String name, String idCard, int sex, int age) {
super();
this.no = no;
this.name = name;
this.idCard = idCard;
this.sex = sex;
this.age = age;
}
public String getNo() {
return no;
}
public void setNo(String no) {
this.no = no;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getIdCard() {
return idCard;
}
public void setIdCard(String idCard) {
this.idCard = idCard;
}
public int getSex() {
return sex;
}
public void setSex(int sex) {
this.sex = sex;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
@Override
public String toString() {
return "Student [no=" + no + ", name=" + name + ", idCard=" + idCard + ", sex=" + sex + ", age=" + age
- "]";
}
}
import java.util.Scanner;
public class StuMgr3_obj {
static int count = 0; //当前学生
static int N = 1000; //可添加的最大学生人数
static Scanner input = new Scanner(System.in);
static Student[] stu = new Student[N];
public static void main(String[] args) {
while(true) {
StuMgr3_obj.showMenu();
System.out.print("请输入<0-5>选择：");
int sel = input.nextInt();
if(sel < 0 || sel > 5) {
System.out.println("没有此项菜单，请重新选择");
continue;
}
switch (sel) {
case 1:
StuMgr3_obj.addStu();
break;
case 2:
StuMgr3_obj.delStu();
break;
case 3:
StuMgr3_obj.updateStu();
break;
case 4:
StuMgr3_obj.selectStu();
break;
case 5:
StuMgr3_obj.selectAllStu();
break;
case 0:
StuMgr3_obj.exitSys();
break;
}
}
}
/**
- 菜单
*/
public static void showMenu() {
System.out.println("---------学生信息管理系统----------");
System.out.println("| 1. 增加学生信息 |");
System.out.println("| 2. 删除学生信息 |");
System.out.println("| 3. 修改学生信息 |");
System.out.println("| 4. 查询学生信息 |");
System.out.println("| 5. 查询所有学生信息 |");
System.out.println("| 0. 退出学生系统 |");
System.out.println("---------------------------------");
}
/**
*1.增加学生信息
*/
public static void addStu() {
System.out.print("请输入学号(一定是6位):");
String no;
while(true) {
no = input.next();
if(6 != no.length()) {
System.out.println("请重新输入学号:");
continue;
}
break;
}
System.out.println("请输入姓名");
String name = input.next();
String idCard;
while (true) {
System.out.println("请输入证件号(一定是18位):");
idCard = input.next();
if (18 != idCard.length()) {
System.out.println("请重新输入证件号");
}else
break;
}
System.out.println("请输入性别(男(1)/女(0))");
int sex = input.nextInt();
System.out.println("请输入年龄(1-100)");
int age = input.nextInt();
stu[count] = new Student(no,name,idCard,sex,age);
count++;
}
/**
- 2.删除学生信息
*/
public static void delStu() {
System.out.print("请输入要删除学生的学号：");
String noString = input.next();
int index = getIndex(noString);
if (index == -1) {
System.out.println("系统中不存在该学生");
}else {
stu[index] = stu[count-1];
System.out.println("已删除成功");
count--;
}
}
/**
- 3.修改学生信息
*/
public static void updateStu() {
System.out.print("请输入要修改学生的学号：");
String noString = input.next();
int index = getIndex(noString);
if (index == -1) {
System.out.println("系统中不存在该学生");
}else {
System.out.println("请输入学号:");
stu[index].setNo(input.next());
System.out.println("请重新输入姓名:");
stu[index].setName(input.next());
System.out.println("请重新输入证件号:");
stu[index].setIdCard(input.next());
System.out.println("请重新输入性别:");
stu[index].setSex(input.nextInt());
System.out.println("请重新输入年龄(1-100):");
stu[index].setAge(input.nextInt());
}
}
/**
*4.查询学生信息
*/
public static void selectStu() {
System.out.print("请输入想查询学生的学号：");
String noString = input.next();
int index = getIndex(noString);
if (index == -1) {
System.out.println("系统中不存在该学生");
}else {
System.out.println("学号:"+stu[index].getNo());
System.out.println("姓名:"+stu[index].getName());
System.out.println("证件号:"+stu[index].getIdCard());
System.out.println("性别((男(1)/女(0))："+stu[index].getSex());
System.out.println("年龄:"+stu[index].getAge());
}
}
/**
- 5.查询所有学生信息
*/
public static void selectAllStu() {
for (int i = 0; i < count; i++) {
System.out.println("姓名为"+stu[i].getName()+"的学生信息为：");
System.out.println("学号："+stu[i].getNo());
System.out.println("证件号："+stu[i].getIdCard());
System.out.println("性别(男(1)/女(0))："+stu[i].getSex());
System.out.println("年龄："+stu[i].getAge());
System.out.println();
}
}
/**
- 0.退出学生系统
*/
public static void exitSys() {
System.out.println("已退出程序");
System.exit(1);
}
/**
- @param noString 学号
- @return 返回该学生在数组中的索引，不存在该学生则返回-1
*/
public static int getIndex(String noString) {
for (int i = 0; i < count; i++) {
if (stu[i].getNo().equals(noString)) {
return i;
}
}
return -1;
}
可实现增、删查看学生信息的功能。
原文地址：https://blog.51cto.com/14511863/2483325