sorting problem

I've got a problem in sorting. I have to use a bubble sort to sort the scores with those who bring the highest percent at the top. The scores of each user i saved in a text file. This is how i tried to do the sorting but its not working. Can someone pls help me out. Thanks a lot.

Code:

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      for(int j = 0; j < questions.length; j++) {
           
         
          int randomIndex = B[j];
          String input = JOptionPane.showInputDialog(null, questions[randomIndex]);

       
          if(answers[randomIndex].equalsIgnoreCase(input))
          {
          count++;  // incrementing counter if entered answer is correct
          point++;

          correct++;
                  JOptionPane.showMessageDialog(null, "Congratulations that is correct!");
                  }
                 
                  else
                        {
                       
                                JOptionPane.showMessageDialog(null, "Wrong Answer!");
                        }
                       
        if(!timeForMore) // if time is over, the program executes the loop an stops asking questions.
          break;
    }
       
   
            JOptionPane.showMessageDialog(null, "You answered " + count +
                                      " out of " + questions.length +
                                      " questions correctly.");
            int percent = (count*100)/questions.length;
        JOptionPane.showMessageDialog(null, "Your Geography Quiz score is " + point + " % ");
         
       
       
       
            try {
              BufferedWriter out;
              String name = JOptionPane.showInputDialog(null, "Enter your name");
              String type = JOptionPane.showInputDialog(null, "Enter your quiz type");
             
           
             
             
            if(type.equals("Plate Tectonics")){
                  out = new BufferedWriter(new FileWriter("players.txt",true));



            out.write(name); //Writing to the textfile (the name entered by user)
           
            out.write(getSpace(20- name.length())); // Here 20 is max length possible change accordingly
            String trimmedStr = name.trim();
            out.write(String.valueOf(points+ " % "));
            out.write("        ");
            out.write(type);
            out.newLine(); //write a new line to the textfile so the next time it writes to the file it does it on the next line
            out.close();
           
           
              for(int i=1; i<points.length; i++) {
              for(int j=0; j<points.length-i; j++) { //if in wrong order then swap 
                if (points[j]>points[j+1]) swap(points, j, j+1);
}
}

         
        }
private static void swap (int[] points, int i, int j) {
    int h = points[i];
    points[i] = points[j];
    points[j] = h;
    }

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My problem is that the program isn't sorting the high scores. In my program according to my tutor i have to use a bubble sort. The program is cpompiling and it is displaying the score. The problem is that its not sorting them. I think the problem is because i'm only passing one number to the array everytime a user does his turn in the game. The scores one scored are written directly into a text file. Therefore my problem is how to sort these numbers since they are stored in a textfile. Pls i really am lost. I really appreciate any help. Thanks a lot.

This is the code:

Code:

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if(type.equals("Car")){
              out = new BufferedWriter(new FileWriter("players.txt",true));
             
            int a[] = {percent}; //what do i need to pass here so the array can read all the scores that are stored in the textfile together with the new                score.
            int i;
 
 
            int temp, counter, index;
 
            int length=0;
 
            for(counter=0; counter<length-1; counter++) { //Loop once for each element in the array.
 
              for(index=0; index<length-1-counter; index++) { //Once for each element, minus the counter.
 
                if(a[index] > a[index+1]) { //Test if need a swap or not.
 
                    temp = a[index]; //These three lines just swap the two elements:
 
                  a[index] = a[index+1];
 
                    a[index+1] = temp;
 
                }
 
            }
 
        }
           
           
            out.write(String.valueOf(percent));
 
         
            out.newLine();
            out.close();
            }

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Thanks a lot.