Sorting Elements in a Vector

import java.util.Scanner;
import java.util.Vector;
class Student{
    int roll_no;
    String name;
}
class SortVec{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        Vector <Student> v = new Vector();
        System.out.println("Enter 5 Entries.");
        for(int i = 0; i < 5; i++){
            Student s = new Student();
            System.out.print("roll no: ");
            s.roll_no = sc.nextInt();
            System.out.print("name: ");
            s.name = sc.next();
            v.add(s);
        }
        for(int i = 0; i<5; i++){
            int j, temp1 = v.elementAt(i).roll_no;
            String temp2 = v.elementAt(i).name;
            for(j = i-1; j>=0 && temp1 < v.elementAt(j).roll_no; j--){
                v.elementAt(j+1).roll_no = v.elementAt(j).roll_no;
                v.elementAt(j+1).name = v.elementAt(j).name;
            }
            v.elementAt(j+1).roll_no = temp1;
            v.elementAt(j+1).name = temp2;
        }
        for(int i = 0; i < 5; i++){
            System.out.println(v.elementAt(i).roll_no + " " + v.elementAt(i).name);
        }
    }
}