Student.java

// class Student:
//               Roll No(UNIQUE ID)
//               Name
// 	Mob No
// 	Email ID
// 	No of days attended
// 	No of labs held
// 	% Attendance


public class Student {
    public String id; // eg: 171IT203
    public int rollNo; //eg: 25
    public String name;
    /* Note: Below parameters are made private to student contact privacy, and to avoid unauthorised manipulation. Although, they are accessible with get and set methods in the class */
    private long contactNo;
    private String emailID;
    private int labsAttended;
    int totalLabs;
    // private float attendance;
    
    public Student(int roll_number, String student_id_number, String student_name, long contact_number , String email_ID) {
        this.rollNo = roll_number;
        this.id = student_id_number;
        this.name = student_name;
        this.contactNo = contact_number;
        this.emailID = email_ID;
        this.labsAttended = 0;
        this.totalLabs = 0;
        //this.attendance = 0;
    }

    // for viewing editing contact number
    public long getContactNumber() { 
        return this.contactNo;
    }
    public void setContactNumber(long contact_number) {
        this.contactNo = contact_number;
    }

    //for viewing and editing emailID
    public String getEmailID() { 
        return this.emailID;
    }
    public void setEmailID(String email_id) {
        this.emailID = email_id;
    }

    //for viewing student attendance
    public float getAttendance() {
        if (this.totalLabs == 0) {
            return 0;
        }
        return (float)this.labsAttended/this.totalLabs;
    }

    // Called when student is present
    public void present() {
        this.labsAttended++;                          
    }

    // To check attendance
    public void CheckAttendance() {                                     
        float attendance=(float)this.labsAttended/ this.totalLabs;

        if (attendance < 75) {
            System.out.println("WARNING: " + this.name + " has attendance shortage at " + String.valueOf(attendance));
            // In case we require:
            // return 1; 
        }
        else {
            System.out.println(this.name + " has sufficient attendance at " + String.valueOf(attendance));
            // return 0;
        }
    }

    // For saving the attendance of students.    
    public void setAttendence(int num){
        this.labsAttended=num;
    }

    public int getAttendence(){
        return this.labsAttended;
    }

    public String toString() {                      //Not used yet.
        System.out.println("RollNo  IDnumber    Name    contactNo   emailID");
        return (String.valueOf(this.rollNo) + "    " + this.id + "  " + this.name + "    " + String.valueOf(this.getContactNumber()) + "    " + this.getEmailID() + "\n");
    }
}