BufferedWriter writes over existing file [duplicate]

Question

I'm trying to create a program which saves text on a file and then text can be added onto the file. However, every time i try to write to the file, it overwrites it and doesn't write anything. I need it to add whatever information i want it UNDER the rest.

    FileReader input;
    BufferedReader readFile;

    FileWriter output;
    BufferedWriter writeFile;

    try {
    //  input = new FileReader(password_file);
        //readFile = new BufferedReader(input);

        output = new FileWriter(password_file);
        writeFile = new BufferedWriter(output);


        //while ((temp_user= readFile.readLine()) !=null) {
            //temp_pass = readFile.readLine();
        //}

        temp_user = save_prompt.getText();

        temp_pass = final_password;

                                        //Writes to the file
        writeFile.write(temp_user);
        writeFile.newLine();
        writeFile.write(temp_pass);

    }
    catch(IOException e) {
        System.err.println("Error: " + e.getMessage());
    }
}

Supersession

1) Use the other FileWriter constructor, the one that takes a boolean second parameter. The API should be able to help you. 2) You need to work on your Google search skills a bit. – Uncork

See FileWriter(File,append) & FileWriter(String,append). – Ardyth

@HovercraftFullOfEels "You need to work on your Google search skills a bit." I have a theory that the OP's search was thwarted because they used 'override' instead of 'overwrite'. But that is just a theory. Don't expect me to explain the (now 5) answers that rushed headlong into answering this without searching. My best guess would be 'vote-slutting'. ;) – Ardyth

@AndrewThompson: nah. Just do a Google search using his very own question topic and it brings many results all with the correct answer. The first hit is to another one of many similar stackoverflow questions. This same question has been asked and answered a kagillion times, and one more of the same question on this site will not help anyone in the future. I stand by my recommendation that he work a bit more on his Google skills. – Uncork

@HovercraftFullOfEels Couldn't hurt.. :) – Ardyth

Answer 1

What you seek for is Append mode.

new FileWriter(file,true); // true = append, false = overwrite

Maharashtra

Answer 2

Replace all existing content with new content.

new FileWriter(file);

Keep the existing content and append the new content in the end of the file.

new FileWriter(file,true);

Example:

    FileWriter fileWritter = new FileWriter(file.getName(),true);
        BufferedWriter bufferWritter = new BufferedWriter(fileWritter);
        bufferWritter.write(data);
        bufferWritter.close();

Detrude

Answer 3

To append the stuff at the end of the file, use the append() method of FileWriter

Gonzalo

Answer 4

change the FileWrite liner to:

output = new FileWriter(password_file, true);

which tells FileWriter to append

http://docs.oracle.com/javase/7/docs/api/java/io/FileWriter.html

Acropetal

Answer 5

Whenever you type

new BufferedWriter(output);

or "write", you are overwriting the "output" file. Try to make sure you only declare a new BufferedWriter once throughout the course of the program, and append() to the file instead of write().

Paapanen