Java Program To Calculate Internal Marks of a Student Using Classes and Objects - Securing The Data Through Methods

March 02, 2015
//classes and objects - securing the data through methods  


package javaapplication7;

/**
 *
 * @author user
 */
import java.lang.*;
import java.io.*;
import java.util.*;

class StudentRec
{
int regNo;
private int test1Marks, test2Marks, quizMarks, assMarks, homeAssgnMarks, attPer =0; 
int attMarks = 0;
double weightedAverageTestMarks, totalMarks;

int settest1Marks(int t) 
{
       if (t>20) return 1;
       if (t<0) return 2;
       test1Marks = t;
return 0;
}
int settest2Marks(int t) 
{
       if (t>20) return 1;
       if (t<0) return 2;
       test2Marks = t;
return 0;
}
int setquizMarks(int q) 
{
       if (q>5) return 1;
       if (q<0) return 2;
       quizMarks = q;
return 0;
}
int setassMarks(int a) 
{
       if (a>5) return 1;
       if (a<0) return 2;
       assMarks = a;
return 0;
}
int sethomeAssgnMarks(int h) 
{
       if (h>5) return 1;
       if (h<0) return 2;
       homeAssgnMarks = h;
return 0;
}
int setattPer(int p) 
{
       if (p>100) return 1;
       if (p<0) return 2;
       attPer = p;
return 0;
}
double computeIM()
{
if (test1Marks>test2Marks)
weightedAverageTestMarks = (0.75*test1Marks)+(0.25*test2Marks);
else
weightedAverageTestMarks = (0.25*test1Marks)+(0.75*test2Marks);
totalMarks = attMarks+weightedAverageTestMarks+quizMarks+homeAssgnMarks+assMarks;
return totalMarks;
}
}


public class StudentRecDemo2 {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws IOException{
        int num,ec;
double internalMarks;
StudentRec  record = new StudentRec();
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));


System.out.print("enter student id ");
num = Integer.parseInt(br.readLine());
record.regNo = num;


while(true)
{
 System.out.println ("Enter test1Marks marks (0-20)");
num = Integer.parseInt(br.readLine());
//record.test1Marks = num;
//System.out.println("Direct accessing Successfull");
ec = record.settest1Marks(num);
if(ec ==0) break;
if(ec == 1)
System.out.println("Marks are too high");
if(ec ==2)
System.out.println(" Negitive Marks are not accepted");
System.out.println("Please enter Correct values");
}

while(true)
{
 System.out.println ("Enter test2Marks marks (0-20)");
num = Integer.parseInt(br.readLine());
//record.test1Marks = num;
//System.out.println("Direct accessing Successfull");
ec = record.settest2Marks(num);
if(ec ==0) break;
if(ec == 1)
System.out.println("Marks are too high");
if(ec ==2)
System.out.println(" Negitive Marks are not accepted");
System.out.println("Please enter Correct values");
}

while(true)
{
 System.out.println ("Enter quizMarks marks (0-5)");
num = Integer.parseInt(br.readLine());
//record.test1Marks = num;
//System.out.println("Direct accessing Successfull");
ec = record.setquizMarks(num);
if(ec ==0) break;
if(ec == 1)
System.out.println("Marks are too high");
if(ec ==2)
System.out.println(" Negitive Marks are not accepted");
System.out.println("Please enter Correct values");
}

while(true)
{
 System.out.println ("Enter assMarks marks (0-5)");
num = Integer.parseInt(br.readLine());
//record.test1Marks = num;
//System.out.println("Direct accessing Successfull");
ec = record.setassMarks(num);
if(ec ==0) break;
if(ec == 1)
System.out.println("Marks are too high");
if(ec ==2)
System.out.println(" Negitive Marks are not accepted");
System.out.println("Please enter Correct values");
}

while(true)
{
 System.out.println ("Enter homeAssgnMarks marks (0-5)");
num = Integer.parseInt(br.readLine());
//record.test1Marks = num;
//System.out.println("Direct accessing Successfull");
ec = record.sethomeAssgnMarks(num);
if(ec ==0) break;
if(ec == 1)
System.out.println("Marks are too high");
if(ec ==2)
System.out.println(" Negitive Marks are not accepted");
System.out.println("Please enter Correct values");
}

while(true)
{
 System.out.println ("Enter  attPercentage (0-100)");
num = Integer.parseInt(br.readLine());
//record.test1Marks = num;
//System.out.println("Direct accessing Successfull");
ec = record.setattPer(num);
if(ec ==0) break;
if(ec == 1)
System.out.println("Marks are too high");
if(ec ==2)
System.out.println(" Negitive Marks are not accepted");
System.out.println("Please enter Correct values");
}


if (num >= 95)
        record.attMarks = 5;
else if (num >= 90)
       record.attMarks = 4;
else if (num >=85)
        record.attMarks = 3;
else if (num >= 80)
        record.attMarks = 2;
else if (num >= 75)
        record.attMarks = 1;
else if (num <75 && num>=65)
{
record.attMarks = 0;  
System.out.println(" Student is eligible for Exam by paying  Condonation Fee and producing Medical Certificate");
}
else
{
        record.attMarks = 0;
        System.out.println("Student is detained");
}
internalMarks = record.computeIM();
System.out.println(" The Internal Marks of the Student = " +internalMarks);

        // TODO code application logic here
    }
   
}


By:
Bhanu Namikaze

Bhanu Namikaze is an Ethical Hacker, Security Analyst, Blogger, Web Developer and a Mechanical Engineer. He Enjoys writing articles, Blogging, Debugging Errors and Capture the Flags. Enjoy Learning; There is Nothing Like Absolute Defeat - Try and try until you Succeed.

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