Editing .txt file Java

I need to to write a Java program that will write entered information in the console to a .txt file. If the .txt file already exists it will have to open it and write the additional information on another line. If the .txt file doesn't exist for a new "Lifter" it will create the .txt and write it in. Basically I don't know how to create a new .txt for each name entered and how to edit it if the person's .txt already exists. How would I go about doing that?

import java.io.IOException;
 import java.io.PrintWriter;
 import java.util.Random;
 import java.util.Scanner;
 
 public class MeetPrinter {
 
     public static void getInfo() {
 
         Scanner scanner = new Scanner(System.in);
         int question;
         String firstName;
         String lastName;
         int squat;
         int bench;
         int lift;
         String meetName;
         do {
 
             System.out.println("Enter first name: ");
             firstName = scanner.next();
 
             System.out.println("Enter Last Name: ");
             lastName = scanner.next();
 
             System.out.println("Enter new Meet Name: ");
             meetName = scanner.next();
 
             System.out.println("Enter max squat weight in kg: ");
             squat = scanner.nextInt();
 
             System.out.println("Enter max bench press in kg: ");
             bench = scanner.nextInt();
 
             System.out.println("Enter max deadlift in kg: ");
             lift = scanner.nextInt();
 
             System.out
                     .println("Enter '1' to enter more lifters or '2' if you are done entering.");
             question = scanner.nextInt();
         } while (question == 1);
 
         try{
             PrintWriter out = new PrintWriter("output.txt");
             Random randomGenerator = new Random();
             int randomInt = randomGenerator.nextInt(100000);
             out.println(lastName + ", " + firstName + " Record #: " + randomInt);
             out.println("");
             String meet = "Meet Name";
             String sq = "SQ Max";
             String bp = "BP Max";
             String sub = "SUB Total";
             String dl = "DL Max";
             String tot = "Total";
             out.printf("%20s %15s %18s %19s %18s %18s",meet ,sq,bp,sub,dl,tot);
             out.println("");
             out.printf("%20s", meetName);
             out.printf("%10d (%6.2f)", squat, squat * 2.2);
             out.printf("%10d (%6.2f)", bench, bench * 2.2);
             float subPounds = (float) ((float)(squat + bench) * 2.2);
             out.printf("%10d (%6.2f)", squat + bench, subPounds);
             out.printf("%10d (%6.2f)", lift, lift * 2.2);
             float tPounds = (float) ((float)(squat + bench + lift) * 2.2);
             out.printf("%10d (%6.2f)", squat + bench + lift, tPounds);
             out.close();
         }catch(IOException e){
             e.printStackTrace();
         }
     }
 
 }
 

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