java Implementation of Simple Student Information Management System Code Example

java Realizes Simple Student Information Management System (No Interface)

Student entity:

package com.edu.imau.wcy;

public class Stu {
  private String stuNum;// Student number 
  private String name;// Name 
  private String gender;// Gender 
  private int age;// Age 
  private int score;// Fraction 
  public Stu() {
    super();
  }
  public String getStuNum() {
    return stuNum;
  }
  public void setStuNum(String stuNum) {
    this.stuNum = stuNum;
  }
  public String getGender() {
    return gender;
  }
  public void setGender(String gender) {
    this.gender = gender;
  }
  public int getAge() {
    return age;
  }
  public void setAge(int age) {
    this.age = age;
  }
  public int getScore() {
    return score;
  }
  public void setScore(int score) {
    this.score = score;
  }
  public String getName() {
    return name;
  }
  public void setName(String name) {
    this.name = name;
  }  
}

Main method:

package com.edu.imau.wcy;
import java.util.*;

public class Main {
 static Stu[] Stu=new Stu[100];// Defines an array of students with a capacity of 100
 static int number=0;
 static Scanner scanner=new Scanner(System.in);

public static void main(String args[]){
 int choice;

 System.out.println(" This is 1 Student information management system, the maximum capacity is 100 Welcome to use this system ");
 while(true){
 System.out.println("1. Information addition ");
 System.out.println("2. Information viewing ");
 System.out.println("3. Information modification ");
 System.out.println("4. Message deletion ");
 System.out.println("5. Information is sorted according to grades from low to high "); 
 System.out.println("6. Information query ");
 System.out.println("7. Quit ");
 System.out.println(" Please enter the action you want to do ");
 choice=scanner.nextInt();
 if(choice==7)break;
 switch(choice){
 case 1:   add(); break;// Add Student Information 
 case 2:   show();break;// Query student information 
 case 3:   change();break;// Modify student information 
 case 4:   delete();break;// Delete student information 
 case 5:   paixu();break;// Sort student information 
 case 6:   query();break;// Query student information 
 }    
}
 System.out.println(" Thank you for your use of this system, and welcome to continue to use it next time ");
}

static void add(){// Add Student Information 
 while(true){
 System.out.println(" Click any key to continue adding student information and stop adding input 0");
 if(scanner.nextInt()==0)break;
 System.out.println(" Please enter the student's student number, name, gender, age and grade ");
 Stu[number]=new Stu();
 Stu[number].setStuNum(scanner.next());
 Stu[number].setName(scanner.next());
 Stu[number].setGender(scanner.next());
 Stu[number].setAge(scanner.nextInt());
 Stu[number].setScore(scanner.nextInt());
 number++;
 System.out.println(" Successful addition ");
 }
 }


 static void show(){// Display student information 
   System.out.println("*******************************************");
   System.out.println("  Student number         Name               Gender         Age          Achievement ");
   for(int i=0;i<number;i++)
   System.out.println(Stu[i].getStuNum()+"\t"+Stu[i].getName()+"\t"+"\t"+Stu[i].getGender()+"\t"+Stu[i].getAge()+"\t"+Stu[i].getScore());
   System.out.println("*******************************************");
 System.out.println();
}

 static void paixu(){// Sort student information 
   int j;
   Stu temp=new Stu();
   for(int i=0;i<number;i++)
   {
     for(j=i+1;j<number;j++)
     if(Stu[i].getScore()>Stu[j].getScore())
     {temp=Stu[i];Stu[i]=Stu[j];Stu[j]=temp;}
   }
   System.out.println(" After sorting is completed, select "Student Information View" to view ");
 }


static void change(){// Change student information 
 System.out.println(" Please enter the student number of the student to modify the information ");
 String Stunumber=scanner.next();
 for(int i=0;i<number;i++)
 {
   if(Stunumber.equals(Stu[i].getStuNum()))
   {System.out.println(" Please enter the information of the student you want to modify , Student number, name, sex, age, score ");
    Stu[i].setStuNum(scanner.next());
     Stu[i].setName(scanner.next());
     Stu[i].setGender(scanner.next());
     Stu[i].setAge(scanner.nextInt());
     Stu[i].setScore(scanner.nextInt());
     break;
   }
   if(number==i)System.out.println(" Sorry, there is no such person ");
 }
}

static void query(){// Query 
  System.out.println(" Please enter the student number to query ");
   String Stunumber=scanner.next();
   int i;
   for(i=0;i<number;i++)
   {
     if(Stunumber.equals(Stu[i].getStuNum())){
       System.out.println("*******************************************");
       System.out.println("  Student number         Name               Gender         Age          Achievement ");
       System.out.println(Stu[i].getStuNum()+"\t"+Stu[i].getName()+"\t"+"\t"+Stu[i].getGender()+"\t"+Stu[i].getAge()+"\t"+Stu[i].getScore());
       System.out.println("*******************************************");
     }
   } 
   if(number==i)System.out.println(" Sorry, there is no such person ");
}


static void delete(){// Delete student information 
 System.out.println(" Please enter the student number for which you want to delete the information ");
 String Stunumber=scanner.next();
 int i;
   for( i=0;i<number;i++)
   if(Stunumber.equals(Stu[i].getStuNum()))break;
   if(number==i)System.out.println(" Sorry, there is no such person ");
 for(;i<number-1;i++)
   Stu[i]=Stu[i+1];
    number--;
 System.out.println(" Delete complete ");
}
}