code that does'nt work on pc

import java.util.Scanner;

public class student_data {
    private String name  ;
    private int roll ;
    private int marks ;

    student_data(String s,int r , int m){
        name=s ;
        roll=r ;
        marks=m ;
    }

    public String setname(){
        return name ;
    }

    public int setroll(){
        return roll ;
    }

    public int setmarks(){
        return marks ;
    }

    public String  getvalues(){
        return String.format("Student Name : %s\n \tRoll : %d\n\tMarks : %d\n", name,roll,marks) ;
    }

    public static void main(String[] args) {
        Scanner input = new Scanner(System.in) ;

        String s ; int roll ; int marks ; int n ;

        System.out.println("Number of students :");
        n = Integer.parseInt(input.nextLine()) ;

        student_data x[] = new student_data [100] ;

        for (int i = 1 ; i<=n ; i++){
            System.out.print(i+".");
            System.out.print("Name :");
            s = input.nextLine() ;

            System.out.print("roll :");
            roll= Integer.parseInt(input.nextLine()) ;

            System.out.print("marks :");
            marks = Integer.parseInt(input.nextLine());

             x[i] = new student_data(s , roll , marks) ;
        }

        System.out.println("Output:");
        for (int i=1 ; i<=n ; i++)
        System.out.println(x[i].getvalues()); ;
    }

}