简单的java学生信息管理系统

发布网友发布时间：2022-04-25 05:37

共1个回答

热心网友时间：2023-10-30 18:13

package bean; public class Student { String name; String studentId; String sex; int grade; public Student(String name,String studentId,String sex,int grade){ this.name= name; this.studentId= studentId; this.sex = sex; this.grade = grade; } public int getGrade(){ return grade; } public String getName(){ return name; } public String getSex(){ return sex; } public void setGrade(int g){ this.grade = g; } public String getStudentId(){ return studentId; } }
System.out.println("***************"); System.out.println("*欢迎来到学生管理系统 *"); System.out.println("*1：增加学生 *"); System.out.println("*2：删除学生 *"); System.out.println("*3：修改成绩 *"); System.out.println("*4：查询成绩 *"); System.out.println("***************"); System.out.println("您想选择的操作是：");
import java.util.*;
Scanner sc = new Scanner(System.in); int choice = sc.nextInt();
package test; import java.util.*; import bean.Student; public class Manager { static List<Student> StudentList = new LinkedList<Student>(); public static void main(String[] agrs){ select(StudentList); } private static void select(List<Student> StudentList ){ System.out.println("***************"); System.out.println("*欢迎来到学生管理系统 *"); System.out.println("*1：增加学生 *"); System.out.println("*2：删除学生 *"); System.out.println("*3：修改成绩 *"); System.out.println("*4：查询成绩 *"); System.out.println("***************"); System.out.println("您想选择的操作是："); Scanner sc = new Scanner(System.in); int choice = sc.nextInt(); switch(choice){ //增加学生 case 1: System.out.print("请输入学生的姓名："); Scanner Sname = new Scanner(System.in); String name = Sname.nextLine(); System.out.print("请输入学生的性别："); Scanner Ssex = new Scanner(System.in); String sex = Ssex.nextLine(); System.out.print("请输入学生的学号："); Scanner SId = new Scanner(System.in); String studentId = SId.nextLine(); System.out.print("请输入学生的成绩："); Scanner Sgrade = new Scanner(System.in); int grade = Sgrade.nextInt(); StudentList.add(new Student(name,studentId,sex,grade)); System.out.println("添加成功！！！！！"); select(StudentList); break; //删除学生成绩 case 2: System.out.print("请告诉我需要删除学生的学号："); Scanner Sid = new Scanner(System.in); String SstudentId = Sid.nextLine(); boolean isfindDelete = false; for (int i = 0; i < StudentList.size(); i++) { if(SstudentId.equals(StudentList.get(i).getStudentId())){ System.out.println("发现了该学生，正在删除..."); StudentList.remove(i); System.out.println("删除成功!!!"); isfindDelete =true; } } if(!isfindDelete){ System.out.println("抱歉，没有找到"); } select(StudentList); break; //修改学生成绩 case 3: System.out.print("请告诉我需要修改成绩学生的学号："); Scanner GId = new Scanner(System.in); String GstudentId = GId.nextLine(); boolean isfindChange = false; for (int j = 0; j < StudentList.size(); j++) { if(GstudentId.equals(StudentList.get(j).getStudentId())){ System.out.println("发现了该学生，正在修改..."); System.out.println("学生原成绩为"+StudentList.get(j).getGrade()); System.out.print("请输入修改后学生的成绩："); Scanner Ggrade = new Scanner(System.in); int grade2 = Ggrade.nextInt(); StudentList.get(j).setGrade(grade2); System.out.println("修改成功!!!"); isfindChange =true; }else{ } } if(!isfindChange){ System.out.println("抱歉，没有找到"); } select(StudentList); break; //查看学生成绩 case 4: System.out.print("请告诉我需要查询学生的学号："); Scanner CId = new Scanner(System.in); String CstudentId = CId.nextLine(); boolean isfindData = false; for (int i = 0; i < StudentList.size(); i++) { if(CstudentId.equals(StudentList.get(i).getStudentId())){ System.out.println("名字:"+StudentList.get(i).getName()); System.out.println("性别:"+StudentList.get(i).getSex()); System.out.println("学号:"+StudentList.get(i).getStudentId()); System.out.println("成绩:"+StudentList.get(i).getGrade()); isfindData = true; } } if(!isfindData){ System.out.println("抱歉，没有找到"); } select(StudentList); break; default: System.out.println("您输入的数字有误，请重新输入："); break; } } }