Name    : Shreyal Mandot

Title   : Assignment 2 SetA 1. Define Student class.Define default constructors,override the toString method.Keep count objects created.Create objects using parameterized constructors and display object count after each object is created.Also display contents of each objects.



import java.io.*;

class student
{

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

student()
{

System.out.println("\nObject Created : Obj No :"+num);
rollno=0;
per=0;
name="No Name Assigned";

}

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

System.out.println("\nObject created.\nobject no:"+num);
rollno=a;
per=b;
name=c;

}

void display()
{

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

}

public String toString()
{

String string="Name : "+name+"Rollno : "+rollno+" "+"Percentage : "+per;
  return(string);

}

}

class ass2_1
{

public static void main(String args[])
{

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

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

BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
n1=Integer.parseInt(br.readLine());

student o[]=new student[n1];

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

for(int i=0;i<n1;i++)
{

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

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

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

student.num++;

o[i]=new student(a1,b1,c1);

}

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

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

System.out.println("\ntoString : ");

for(int i=0;i<n1;i++)
System.out.println("\nConversion toString : "+o[i].toString());

}

catch(IOException e)
{

System.out.println(e);

}

}

}

/*

Output-

[prady@localhost setA]$ javac ass2_1.java
[prady@localhost setA]$ java ass2_1

Enter No Of Students :
3

Enter The Data :

Roll No : 43

Percentage : 65

Name:Pradnya Parandekar

Object created.
object no:1

Roll No : 13

Percentage : 65

Name:Pooja Gogate

Object created.
object no:2

Roll No : 5

Percentage : 66

Name:Snehal Chougule

Object created.
object no:3

Total No Of Students : 3
Data :


Roll no : 43
Name : Pradnya Parandekar
Percentage : 65.0

Roll no : 13
Name : Pooja Gogate
Percentage : 65.0

Roll no : 5
Name : Snehal Chougule
Percentage : 66.0

toString :

Conversion toString : Name : Pradnya ParandekarRollno : 43 Percentage : 65.0

Conversion toString : Name : Pooja GogateRollno : 13 Percentage : 65.0

Conversion toString : Name : Snehal ChouguleRollno : 5 Percentage : 66.0
[prady@localhost setA]$

*/