calculate spi for any number of students...

It is required to compute SPI (semester performance index) of n students of your college for their registered subjects in a semester. Declare a class called student having following data members:

id_no , no_of_subjects_registered, subject_code , subject_credits, grade_obtained and spi.

- Define constructor and calculate_spi methods.

- Define main to instantiate an array for objects of class student to process data of n students to be given as command line arguments.

import java.util.Scanner;

class Student
{
int id_no,no_of_sub_registered;
int[] sub_code=new int[7];
int[] sub_credit=new int[7];
String[] grade_obtain=new String[10];
int[] grade_point=new int[10];
double spi;
int sum=0,sum1=0;

Student()
{
no_of_sub_registered=7;
sub_code[0]=150001;
sub_credit[0]=2;
sub_code[1]=150701;
sub_credit[1]=5;
sub_code[2]=150702;
sub_credit[2]=6;
sub_code[3]=150703;
sub_credit[3]=6;
sub_code[4]=150704;
sub_credit[4]=4;
sub_code[5]=150705;
sub_credit[5]=1;
sub_code[6]=150606;
sub_credit[6]=6;
}

void calculate_spi()
{

for(int i=0;i<=6;i++)
{




if(grade_obtain[i].equals("AA"))
grade_point[i]=10;
else if(grade_obtain[i].equals("AB"))
grade_point[i]=9;
else if(grade_obtain[i].equals("BB"))
grade_point[i]=8;
else if(grade_obtain[i].equals("BC"))
grade_point[i]=7;
else if(grade_obtain[i].equals("CC"))
grade_point[i]=6;
else if(grade_obtain[i].equals("CD"))
grade_point[i]=5;
else if(grade_obtain[i].equals("DD"))
grade_point[i]=4;
else if(grade_obtain[i].equals("FF"))
grade_point[i]=0;


this.sum = sum+(sub_credit[i]*grade_point[i]);
this.sum1 = sum1+sub_credit[i];

}

spi = sum/sum1;
System.out.println("your spi is = "+spi);
}


public static void main(String [] args)
{
Scanner jaimin=new Scanner(System.in);
Student obj=new Student();
int length =args.length;

if(length <= 0)
{
System.out.println("enter enrollment no list");
}



for(int k=0;k < length ; k++)
{
System.out.println("Enter details about grade obtain for each subject \n \n");
System.out.println("subject code \t subject credit \t obtain grade \n");
System.out.println("------------------------------------------------ \n");

for(int i=0;i<=6;i++)
{
System.out.print(obj.sub_code[i]+"\t \t \t"+ obj.sub_credit[i] +"\t \t \t");
String r=jaimin.nextLine();
obj.grade_obtain[i]=r;

}

obj.calculate_spi();
}
}
}

OUTPUT