Java Write Student management system

Package Homework08;
/* Debug a morning, Harvest: learned the use of yesterday's debug
Lessons learned: Student stus[]=new student[2];
for (int i=0;i<stus.length;i++) {
Stus[i]=new Student (); it should be written out of the loop, otherwise it will be initialized every time.
}*/

Import Java.util.Scanner;

public class Main {
public static void Main (String[]args) {

/**
* 1: Create a simple student information management system, through the keyboard selection operation to add students (student number, name, gender, age, score) information,
* This information is stored through an array,
* 2: Can be queried for one or all student information
* 3: Modify student information
* 4: Delete the student information operation. (Some optimizations are required, for example, if the user is entering information to meet the required processing).
*/
Student Stus[]=new student[2];
for (int i=0;i<stus.length;i++) {
Stus[i]=new Student ();
}

while (true) {
SYSTEM.OUT.PRINTLN ("--------------------Welcome to the student management System--------------------------");
System.out.println ("1: Input student Information");
System.out.println ("2: Modify student Information");
System.out.println ("3: Delete student information");
System.out.println ("4: Inquiry of Student Information");
System.out.println ("0: Exit system");
System.out.println ("-----------Please enter option----------------");


Scanner scanner=new Scanner (system.in);
int M=scanner.nextint ();


int js;

Switch (m) {
Enter student information
Case 1:

{//Enter student's name
int z=0;
System.out.println ("Please enter student information");
System.out.println ("Please enter student's name:");
String Name=scanner.next ();
Stus[z].setname (name);
Enter Student's study number
System.out.println ("Please enter student number:");
String Stunum=scanner.next ();
Stus[z].setstunum (Stunum);
Enter student gender
System.out.println ("Please enter Student Gender:");
String Gender=scanner.next ();
Stus[z].setgender (gender);
Enter student age
System.out.println ("Please enter Student Age:");
int Age=scanner.nextint ();
Stus[z].setage (age);

Enter student Scores
SYSTEM.OUT.PRINTLN ("Please input student results:");
float score=scanner.nextfloat ();
Stus[z].setscore (score);
SYSTEM.OUT.PRINTLN ("-----------------input End------------------");

z++;}
Break

Case 2:{
Boolean beep=false;//beep Determine if student information is found
System.out.println ("Please enter the student number you want to change:");
String Stunum4=scanner.next ();
for (int i=0;i<stus.length;i++) {
if (Stunum4.equals (Stus[i].getstunum ())) {
Re-enter student's name
System.out.println ("Please enter your student name");
String Name1=scanner.next ();
Stus[i].setname (NAME1);
Re-enter student's study number
System.out.println ("Please enter student number");
String Stunum1=scanner.next ();
Stus[i].setstunum (STUNUM1);
Re-enter the student's gender
System.out.println ("Please enter student gender");
String Gender1=scanner.next ();
Stus[i].setgender (Gender1);
Re-enter the student's age
System.out.println ("Please enter student age");
int Age1=scanner.nextint ();
Stus[i].setage (AGE1);
Re-enter students ' grades
System.out.println ("Please enter student results");
Float score1=scanner.nextfloat ();
Stus[i].setscore (Score1);
SYSTEM.OUT.PRINTLN ("----------modification completed--------------");
Beep=true;

}
}
if (beep) {
SYSTEM.OUT.PRINTLN ("No information is found for students, please redefine");
}

}
Break
Case 3:{
Boolean Bo=false;//bo determines whether the student information is found
int w=0;
System.out.println ("Please enter the student number you want to delete:");
String Stunum2=scanner.next ();
for (int i=0;i<stus.length;i++)
{if (Stus[i].getstunum (). Equals (stuNum2)) {
System.out.println ("Find to student, please indicate whether to delete.") Please enter Yes or no: ");
String Sf=scanner.next ();
if (sf== "yes") {
/**
* Put the last student information in the previous array element
*/
for (int j=i;j<stus.length-w;j++) {
STUS[J]=STUS[J+1];
}
for (int k=999;k>stus.length-w;k--) {
Stus[k]=null;
}
Bo=true;
}

else if (sf== "no") {
Break
}

}

if (bo) {
SYSTEM.OUT.PRINTLN ("The data you entered is wrong, please re-enter");
Break
}
}
}
Break
Query Student Information
Case 4:{
Boolean boo=false;
System.out.println ("Please enter the student number of your enquiry");
String Stunum3=scanner.next ();
for (int i=0;i<stus.length;i++) {
if (Stunum3.equals (Stus[i].getstunum ())) {
System.out.println ("The Student's name:" + stus[i].getname ());
System.out.println ("The Student's study number:" +stus[i].getstunum ());
System.out.println ("The Student's Gender:" +stus[i].getgender ());
System.out.println ("The Student's Age:" +stus[i].getage ());
System.out.println ("The Student's score:" +stus[i].getscore ());
}

}
}
Break
Exit system
Case 0:{
System.out.println ("--------exit system---------------");
Scanner.close ();//scanner.close () indicates input is off
System.exit (0);//system.exit (0) indicates system shutdown

}

}



}


}
}

Package Homework08;
Create a student student class that contains properties and features.
public class Student {
Attributes (school number, name, gender, age, score)
String Stunum;
String name;
String gender;
int age;
Float score;

functions as follows
Enter study number
public void Setstunum (String stunum) {
This.stunum=stunum;
}
Output number
Public String Getstunum () {
return stunum;
}

Enter a name
public void SetName (String name) {
This.name=name;
}
Output name
Public String GetName () {
return name;
}

Enter gender
public void Setgender (String gender) {
This.gender=gender;
}
Output gender
Public String Getgender () {
return gender;
}
Enter age
public void Setage (int.) {
This.age=age;
}
Output age
public int getage () {
return age;
}
Enter score
public void SetScore (float score) {
This.score=score;
}
Output score
public float Getscore () {
return score;
}

}

Java Write Student management system