try ( FileInputStream fileInputStream = new FileInputStream(new File(filepath));
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(fileInputStream, "utf-8"), 10 * 1024 * 1024);)
{
String line;
while ((line = bufferedReader.readLine()) != null) {
if (len != 0) {
builder.append("\r\n"+line);
} else {
builder.append(line);
}
len++;
}
} catch(Exception e) {
e.printStackTrace();
}