Question

I have a simple txt file that will save only 1 word, but whenever I restart the program everything inside the data.txt is deleted – I don’t know why?

The whole class code:

import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintStream;

public class InfoSaver {
    File data = new File("data.txt");
    FileOutputStream fos;
    PrintStream writer;
    FileInputStream fis;
    DataInputStream reader;
    public void init() throws IOException{
        fos = new FileOutputStream(data);
        writer = new PrintStream(fos);
        fis = new FileInputStream(data);
        reader = new DataInputStream(fis);

    }
    public void writeData(String info) {
        writer.println(info);

    }
    public String readData() throws IOException{
        return reader.readLine();
    }
    public void close() throws IOException{
        writer.close();
        reader.close();
    }
}

Answer 1

You’re not appending new information to the file, you’re overwriting it.

Anytime you just open it in the

fos = new FileOutputStream(data);

command, it gets emptied, no matter if you have saved anything inside it or not.