writing file and sorting in array

[Adrian_1]

A lecturer has a text file which includes a list of students name and final exam marks. Create a Java program which:

• Read all the records from the file
• Sort all the records from the file and
• Exit from application

[JamesCherrill]

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Post what you have done so far and someone will help you from there.

[Adrian_1]

import java.util.Scanner;
import java.io.*;
import javax.swing.JOptionPane;
public class WriteFile {


    public static void main(String[] args) throws FileNotFoundException, IOException  {

  FileWriter file = new FileWriter("Student Name and Scores.txt");
 //PrintStream output = new PrintStream(new File("output.txt"));
    Scanner scan = new Scanner (System.in);  
    System.out.print("Enter number of Students in Class: ");
    int k = scan.nextInt();
    PrintWriter output = new PrintWriter(file);
    for (int j=1; j <= k; j++){
        PrintWriter output1 = new PrintWriter(file);
    System.out.print("Enter Student First Name: ");
    String Name = scan.next();
    output.print(Name);
    output.print(" ");
    System.out.print("Enter Student Last Name: ");
    String lastName = scan.next();
    output.print(lastName);
            output.print('\t');
    System.out.print("Enter Student Scores: ");
    double score = scan.nextDouble();
    output.print(score);

    output.print('\n');
    }
    output.close();

    System.out.println("Names and Scores are entered");



    }

}

import java.io.File;
import java.io.FileNotFoundException;
import java.util.*;

public class ReadData {

    public static void main (String [] args) throws FileNotFoundException {
  try {
   File file = new File("Student Name and Scores.txt");


   Scanner scanner = new Scanner(file);
   while (scanner.hasNextLine()) {
    System.out.println(scanner.nextLine());
   }
   scanner.close();
  } catch (FileNotFoundException e) {
   e.printStackTrace();
  }
 }

That is what i have done so far, i dont know how i want to sort them according to the numbers input by the user.