JAVA CONSTRUCTURE

 public class student

{
    int id;
    String name;
    String rollno;
    student(int i, String n, String r)
    {
        id=i;
        name= n;
        rollno= r.toString();
    }
    student(student s1)
    {
        id=s1.id;
        name=s1.name;
        rollno=s1.rollno;
    }
    void display()
    {
        System.out.println(id+" "+name+" "+rollno);
    }
    public static void main(String[] args)
    {
        student obj1=new student(2197,"Himanshu","21bcs5642");
        student obj2=new student(obj1);
        obj1.display();
        obj2.display();
    }
}