问Java: Bank模拟:写入文件，擦除文本/写入符号

EN

if (choice.equals("ADD")){
            System.out.println("Currently selected: " + choice);
            //write to file
            try {
                String filePath = "C:\\Users\\user\\Desktop\\programming\\projects\\java\\RandomStuff\\Bank\\balance.txt";
            //    System.out.println("How much would you like to add?");
            //    Scanner inputAdd = new Scanner(System.in);
            //    String balanceToAdd = inputAdd.nextLine();
            //    writeToFile.write(balanceToAdd);



                int balanceToAdd = 1;
                BufferedWriter out = new BufferedWriter(new FileWriter(filePath));
                out.write(balanceToAdd);
                out.close();
                System.out.println("Added: " + balanceToAdd);
            }   //try end
            catch(IOException e){
                System.out.println("Error(line56): " + e.getMessage());
            }