Generating random number(Linked List) ? Ideas Welcomed

Program is a Game, user enters name and a Random Score is produced. Im having trouble coming up with a idea on how to produce a random score.

I have implemented the program so the user enters his name and inputs his own score, this is not quite correct though.

import java.util.*;
import java.lang.*;
import java.io.*;

class Game
{
static class Node 
{
    public int score;
    public String name;
    public Node next;

    public Node(int score, String name) 
           {
        this.score = score;
        this.name = name;
        this.next = null;
    }
}


static class LinkedList 
   {

    public Node head;

    public LinkedList() 
           {
        this.head = null;
    }

    public void add(Node node)
           {
        this.head = add(node, head);
    }

    public Node add(Node node, Node head) 
          {
        if (head == null) return node;
        if (head.score <= node.score) 
                  {
            node.next = head;
            return node;
        }
        return add(node, head.next);
    }

    public void remove(String name) 
           {
        this.head = remove(name, head);
    }

    public Node remove(String name, Node head) 
           {
        if (head == null) 
                    return null;
        if (name.equals(head.name)) 
                    return remove(name, head.next);

        head.next = remove(name, head.next);
          return head;
    }

    public void print() 
           {
        Node temp = head;
        for (int i = 0; i < 10 && temp != null; i++, temp = temp.next)
                  {
            System.out.println(temp.name + " " + temp.score);
        }
    }

    // print from top 25 for a player
    public void print(String name) 
           {
        Node temp = head;
        for (int i = 0; i < 25 && temp != null; i++, temp = temp.next)
                  {
            System.out.println(temp.score);
        }
    }
}

public static void main (String[] args) throws java.lang.Exception
{
    File file = new File("scores.txt");
    Scanner fileInput;
    try 
           {
        fileInput = new Scanner(file);
    }
    catch (Exception e) 
           {
        System.out.println(e);
        return ;
    }

    LinkedList game = new LinkedList();

    // load file
    while (fileInput.hasNextLine()) 
           {
        String name = fileInput.next();
        int score = fileInput.nextInt();

        game.add(new Node(score, name));
    }

    while (true)
          {
        System.out.println("Menu:- ");
        System.out.println("1. Enter your name, and play a game (Randomly simulate the score");
        System.out.println("2. Display the current leaderboard (Top 10 scores only)");
        System.out.println("3. Search for scores of a player on the top 25 scores using name (single player can be present multipletimes on the leaderboard)");
        System.out.println("4. Delete the scores for a specific player (All scores for the player are deleted)");
        System.out.println("5. Quit the program");

        Scanner input = new Scanner(System.in);
        int option = input.nextInt(); 
        if (option == 1) 
                  {
            System.out.print("Enter name and score:");
            String name = input.next();
            int score = input.nextInt();

            game.add(new Node(score, name));
        }
        else if (option == 2) 
                  {
            game.print();
        }
        else if (option == 3) 
                  {
            System.out.print("enter player name:");
            String name = input.next();
            game.print(name);
        }
        else if (option == 4)
                  {
            System.out.print("enter player name to remove:");
            String name = input.next();
            game.remove(name);
        }
        else if (option == 5) 
                  {
            PrintWriter output = new PrintWriter(file);
            Node temp = game.head;
            for (int i = 0; i < 25 && temp != null; i++, temp = temp.next)
                          {
                output.println(temp.name + " " + temp.score);
            }

            return ;
        }
    }
}

}