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This article mainly explains "how to use Java to write a student management system". The content of the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "how to write a student management system using Java".

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Foreword:

In fact, as a Java programmer, whether you are a beginner or god, student management system has always been a very good example, beginners mainly use array, List, and so on to write a simple student management system, second, the great god uses database + swing to do a student management system with interface. It won't be too hard.

I first write a simple use of List to implement the student management system:

First of all, the management system is aimed at the student object, so let's write down the student object first:

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;}}

This defines some get methods to get the current student object data, and score modification set methods, the code is very simple, do not do detailed answers.

Here is our text.

Although we don't need swing to do the interface for the time being, we have to look at the past, so we have made a relatively simple interface first:

System.out.println ("*");    System.out.println ("* Welcome to the student management system *");    System.out.println ("* 1: add students *");    System.out.println ("* 2: delete students *")    System.out.println ("* 3: modify grades *");    System.out.println ("* 4: query grades *");    System.out.println ("*");    System.out.println ("the action you want to choose is:")

As you can see here, we use a 1234 to select items, so we have to talk about how Java gets the data entered by the keyboard-Scanner. To use this, you first need to enter a package from import:

For example, here:

Import java.util.*

The next two lines of code fix the input:

Scanner sc = new Scanner (http://System.in); int choice = sc.nextInt ()

Then there is the implementation of each function:

Package test;import java.util.*;import bean.Student;public class Manager {static List StudentList = new LinkedList (); public static void main (String [] agrs) {select (StudentList);} private static void select (List StudentList) {System.out.println ("*"); System.out.println ("* Welcome to the student management system *"); System.out.println ("* 1: add students *") System.out.println ("* 2: delete student *"); System.out.println ("* 3: modify grade *"); System.out.println ("* 4: query score *"); System.out.println ("*"); System.out.println ("the action you want to choose is:") Scanner sc = new Scanner (System.in); int choice = sc.nextInt (); switch (choice) {/ / add student case 1:System.out.print ("Please enter student's name:"); Scanner Sname = new Scanner (System.in); String name = Sname.nextLine (); System.out.print ("Please enter student's gender:"); Scanner Ssex = new Scanner (System.in); String sex = Ssex.nextLine (); System.out.print ("Please enter student's student number:") Scanner SId = new Scanner (System.in); String studentId = SId.nextLine (); System.out.print ("Please enter the student's score:"); Scanner Sgrade = new Scanner (System.in); int grade = Sgrade.nextInt (); StudentList.add (new Student (name,studentId,sex,grade)); System.out.println ("added successfully!") ; select (StudentList); break;// deletes the student score case 2:System.out.print ("Please tell me I need to delete the student's student number:"); Scanner Sid = new Scanner (System.in); String SstudentId = Sid.nextLine (); boolean isfindDelete = false;for (int I = 0; I < StudentList.size (); iTunes +) {if (SstudentId.equals (StudentList.get (I). GetStudentId ()) {System.out.println ("found the student and is deleting.") StudentList.remove (I); System.out.println ("deleted successfully!"); isfindDelete = true;}} if (! isfindDelete) {System.out.println ("Sorry, not found");} select (StudentList); break;// modify student's grade case 3:System.out.print ("Please tell me I need to change the student's student number:"); Scanner GId = new Scanner (System.in); String GstudentId = GId.nextLine (); boolean isfindChange = false;for (int j = 0) J < StudentList.size (); getStudentId +) {if (GstudentId.equals (StudentList.get (j). GetStudentId ()) {System.out.println ("found the student and is revising..."); System.out.println ("the student's original grade is" + StudentList.get (j). GetGrade ()); System.out.print ("Please enter the revised student's score:"); Scanner Ggrade = new Scanner (System.in); int grade2 = Ggrade.nextInt () StudentList.get (j) .setbacks (grade2); System.out.println ("modified successfully!!"); isfindChange = true;} else {} if (! isfindChange) {System.out.println ("Sorry, not found");} select (StudentList); break;// check student scores case 4:System.out.print ("Please tell me to check the student's student number:"); Scanner CId = new Scanner (System.in); String CstudentId = CId.nextLine (); boolean isfindData = false For (int I = 0; I < StudentList.size (); getStudentId +) {if (CstudentId.equals (StudentList.get (I). GetStudentId ()) {System.out.println ("name:" + StudentList.get (I). GetName ()); System.out.println ("gender:" + StudentList.get (I). GetSex ()); System.out.println ("student number:" + StudentList.get (I). GetStudentId ()); System.out.println ("grade:" + StudentList.get (I). GetGrade ()) IsfindData = true;}} if (! isfindData) {System.out.println ("Sorry, not found");} select (StudentList); break;default:System.out.println ("you entered a wrong number, please re-enter:"); break;}

As you can see, I put all the implementation processes in the select (); method, which prevents me from continuing with other operations after I have selected one operation. Most of the operations rely on the for loop to traverse the operation, which is convenient and fast.

Thank you for your reading, the above is the content of "how to use Java to write a student management system". After the study of this article, I believe you have a deeper understanding of how to use Java to write a student management system, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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