Как сравнить переменную с каждой строчкой файла?

private byte flagNameStr = 1;
private String myTxt = "Gg";
try {
            FileInputStream fileInput = openFileInput("file.txt");
            InputStreamReader readerlist = new InputStreamReader(fileInput);
            BufferedReader bufferlist = new BufferedReader(readerlist);
            StringBuffer strBuffer = new StringBuffer();
            String lines;
            while ((lines = bufferlist.readLine()) != myTxt && (lines = bufferlist.readLine()) != null){
                flagNameStr = 1;
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }