content: import java.io.File;
  import java.io.FileInputStream;
  import java.io.FileNotFoundException;
  import java.io.FileOutputStream;
  import java.io.IOException;
  import java.io.ObjectInputStream;
  import java.io.ObjectOutputStream;
  
  public class userInfoReadWrite
  {
      public static void main(String[] args)
      {
          //create some user Objects
          user usr1 = new user("emaxthedestroyer", "pass123!");
          user usr2 = new user("barlow", "goatStatus99");
          user usr3 = new user("metalFrae", "letsGetIt13");
          user usr4 = new user("atom_23", "carwash2@2019");
      }
  }//end main
  
  public static void writeOutput()
  {
      try{
          FileOutputStream file = new FileOutputStream(new File("userData.txt"));
          ObjectOutputStream output = new ObjectOutputStream(file);//Pass in the output file
  
          //write out each object (the user's data)
          output.writeObject(usr1);
          output.writeObject(usr2);
          output.writeObject(usr3);
          output.writeObject(usr4);
  
          //close the file streams
          output.close();
          file.close();
      }
      catch(IOException e)
      {
          System.err.println("Error initializing the Input/Output stream");
      }
      catch(FileNotFoundException e)
      {
          System.err.println("File was not found");
      }
  }
  
  public static void readInput()
  {
      try{
  
          FileInputStream inputFile = new FileInputStream(new File("userData.txt"));
          ObjectInputStream input = new ObjectInputStream(inputFile);//pass in the input file
  
          //reading the objects back in
          user readUsr1 = (user) input.readObject();
          user readUsr2 = (user) input.readObject();
          user readUsr3 = (user) input.readObject();
          user readUsr4 = (user) input.readObject();
  
          //printing user info to the screen
          System.out.println(readUsr1.toString());
          System.out.println(readUsr2.toString());
          System.out.println(readUsr3.toString());
          System.out.println(readUsr4.toString());
  
          //close the input streams
          input.close();
          inputFile.close();
      }
      catch(IOException e)
      {
          System.err.println("Error initializing the Input/Output stream");
      }
      catch(FileNotFoundException e)
      {
          System.err.println("Readable file was not found");
      }
  
  }