Highscore Top 10 FileWriter/Reader

Hello,
i would like to add a highscore list to my sudoku game,
to save all scores i created a filewriter and wrote the scores into the .txt
but how can i manage to get the best times on the top? i thought of bubble sort, but i dont know how to only get the times back from the .txt

bubble sort

 void bubbleSort ()
{
for (int end = 10; end > 0;ende--)
{
  for (int i = 0; i < end; i++)
 {
    if (scores[i]>scores[i+1])
    {
          int ablage = scores[i];
          scores[i] = scores[i+1];
          scores[i+1] = ablage;
     }
   }
 }

File Writer

try{
            // Create file 
            BufferedWriter out = new BufferedWriter(new FileWriter("out.txt"));
            out.write("\t\t\tBestzeiten Top 10");
            out.newLine();
            String platz1 = " 1." + uhr.getText();
            out.write(platz1);
            out.newLine();
            out.write(" 2.");
            out.newLine();
            out.write(" 3.");
            out.newLine();
            out.write(" 4.");
            out.newLine();
            out.write(" 5.");
            out.newLine();
            out.write(" 6.");
            out.newLine();
            out.write(" 7.");
            out.newLine();
            out.write(" 8.");
            out.newLine();
            out.write(" 9.");
            out.newLine();
            out.write("10.");
            //Close the output stream
            out.close();
        }catch (Exception e){//Catch exception if any
            System.err.println("Error: " + e.getMessage());
        }
}

FileReader

try{
            BufferedReader br = new BufferedReader(new FileReader("out.txt"));            
            for(int r=0; r<11;r++){
                
             String zeile = br.readLine();
             System.out.println(zeile);
             System.out.println("");
            }

            br.close();
            }catch (Exception e){//Catch exception if any
            System.err.println("Error: " + e.getMessage());
              }