Name    : Shreyal Mandot

Title   : Assignment 2 SetA 2. Write a java program to create n objects of the Student class. Assign roll numbers in the ascending order. Accept name and percentage from the user for each object. Define a static method “sortStudent” which sorts the array on the basis of percentage.



import java.io.*;

class student1
{

static int num;
int rollno;
double per;
String name;

student1()
{

rollno=0;
per=0;
name="No Name Assigned";

}

student1(int a,double b,String c)
{

rollno=a;
per=b;
name=c;

}

void display()
{

System.out.println("\nRoll no : "+rollno+"\nName : "+name+"\nPercentage : "+per);

}

}

class ass2_2
{

static void sortStudent(student1 []s1)
{

double tempd;
String temps;
int tempi;

for(int i=1;i<student1.num;i++)
{

System.out.println(i);

for(int j=0;j<i;j++)
{        

if(s1[i].per>s1[j].per)
{

tempi=s1[i].rollno;
tempd=s1[i].per;
temps=s1[i].name;

s1[i].rollno=s1[j].rollno;
s1[i].per=s1[j].per;
s1[i].name=s1[j].name;
s1[j].rollno=tempi;
s1[j].per=tempd;
s1[j].name=temps;

}

}

}

System.out.println("\nData After Sorting In Descending Order Of Percentage : \n");
               
for(int i=0;i<student1.num;i++)
        s1[i].display();

}

public static void main(String args[])
{

try
        {
                 
        int n1,a1;
  double b1;
  String c1;

  System.out.println("\nEnter The No Of Students : ");

  BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
  n1=Integer.parseInt(br.readLine());
  student1 o[]=new student1[n1];

  System.out.println("\nEnter The Data : \n");

  for(int i=0;i<n1;i++)
  {

System.out.print("\n\nName : ");
c1=br.readLine();

System.out.print("\n\nRoll No : ");
  a1=Integer.parseInt(br.readLine());

System.out.print("\n\nPercentage : ");
b1=Double.parseDouble(br.readLine());

student1.num++;
o[i]=new student1(a1,b1,c1);

}

System.out.println("\nTotal No Of Students : "+student1.num+"\nData Before Sorting : \n");

for(int i=0;i<n1;i++)
o[i].display();

sortStudent(o);

}
           
catch(IOException e)
{

System.out.println(e);

}

}

}

/*

Output-

[prady@localhost setA]$ javac ass2_2.java
[prady@localhost setA]$ java ass2_2

Enter The No Of Students :
5

Enter The Data :



Name : Pradnya Parandekar


Roll No : 43


Percentage : 68


Name : Pooja Gogate


Roll No : 13


Percentage : 69


Name : Snehal Chougule


Roll No : 3


Percentage : 66


Name : Amit Raut


Roll No : 55


Percentage : 64


Name : Madhuri Katekar


Roll No : 48


Percentage : 70

Total No Of Students : 5
Data Before Sorting :


Roll no : 43
Name : Pradnya Parandekar
Percentage : 68.0

Roll no : 13
Name : Pooja Gogate
Percentage : 69.0

Roll no : 3
Name : Snehal Chougule
Percentage : 66.0

Roll no : 55
Name : Amit Raut
Percentage : 64.0

Roll no : 48
Name : Madhuri Katekar
Percentage : 70.0


Data After Sorting In Descending Order Of Percentage :


Roll no : 48
Name : Madhuri Katekar
Percentage : 70.0

Roll no : 13
Name : Pooja Gogate
Percentage : 69.0

Roll no : 43
Name : Pradnya Parandekar
Percentage : 68.0

Roll no : 3
Name : Snehal Chougule
Percentage : 66.0

Roll no : 55
Name : Amit Raut
Percentage : 64.0
[prady@localhost setA]$

*/