How to write data to .txt file(FileWriter) from another class in javafx

Question

I am making cinema seat booking system as semester project. I saved person name, movie name and seat numbers attributes in a .txt file with javafx, but the problem is that it overwrites previous record when I make bookings for another person. No matter how many bookings I make it only saves last one because this line FileWriter data=new FileWriter("reservation.txt"); is also called every time. So is there a way to make .txt file in another class and write data in another class, or any other solution?

try{
    FileWriter data=new FileWriter("reservation.txt");

    data.write("Customer Name: "+Cinemafx.name+"    ");
    data.write("Movie Name: "+movieselection.movie_name+"    ");
    data.write("Seat Numbers: "+listString+"    ");

    data.close();
}
    catch(Exception ex){
}

score 1 · Answer 1 · answered Dec 26 '18 at 14:11

1

You could save all the data in a collection and loop through the collections once and write everthing in the Flatfile without overwriting it. Or you have also the option to append data to a File with Filewriter, take a look at this question: Java FileWriter with append mode.

answered Dec 26 '18 at 14:11

Alex Gruebel

86
1
9

that append mode worked...I want to enter each entry on next line in .txt file how can I achieve that? – irfan Dec 26 '18 at 15:00
You can add a new line \n after every entity with data.write(„\\n“);. – Alex Gruebel Dec 26 '18 at 15:09

score 0 · Accepted Answer · answered Dec 26 '18 at 14:48

You can make a new file for each registration and save it in a registrations folder; that way not only will you be able to avoid overwriting but it'll be much easier to retrieve data for each customer as well. So for example you can give your file the name of your customer like:

FileWriter data = new FileWriter(Cinemafx.name + ".txt");

Though when multiple customers' name is same then it could cause a problem so you have to work around that. Suggestion: include an ID field maybe?

great idea! I added ID and it worked – irfan Dec 26 '18 at 15:17 — irfan, Dec 26 '18 at 15:17

How to write data to .txt file(FileWriter) from another class in javafx

2 Answers2