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Thread: Read Writer button wont add to file.

  1. #1
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    Default Read Writer button wont add to file.

    my writer reader wont save data and add data to the file. When i run it all it does is overwrites the data. code is :
       String add = nameField.getText();
            String newLine = ("\n");
            File file = new File("C:NewTest.dat");
            try {
    // check whether the file is existed or not
                if (file.exists()) {
     
                    // create a new file if the file is not existed
                    file.createNewFile();
                }
                // new a writer and point the writer to the file
                BufferedWriter writer = new BufferedWriter(new FileWriter(file));
                // writer the content to the file
                writer.write(newLine);
                writer.write(add);
                // always remember to close the writer
                writer.close();
                writer = null;
            } catch (IOException ab) {
                ab.printStackTrace();
            }
            try {
                // new a reader and point the reader to the file
                BufferedReader reader = new BufferedReader(new FileReader(file));
                nameArea.append(add + newLine);
                reader.close();
                reader = null;
            } catch (FileNotFoundException ab) {
                ab.printStackTrace();
            } catch (IOException ab) {
                ab.printStackTrace();
            }


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Read Writer button wont add to file.

    add data to the file
    There is an arg in a constructor that will APPEND data to an existing output file instead of creating a new file. Read the API doc to see how to code it.
    If you don't understand my answer, don't ignore it, ask a question.

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