How to write Java code to listen runtime changes in text file

I had a requirement to write a java code to listen continues changing text file.I have used following code to do that.

public void listenServer() throws IOException {
Reader fileReader = new FileReader("/home/vaani/server.log");
BufferedReader input = new BufferedReader(fileReader);
String line = null;
while (true) {
  if ((line = input.readLine()) != null) {
    System.out.println(line);
    continue;
  }
 try {
    Thread.sleep(1000L);
  } catch (InterruptedException x) {
      Thread.currentThread().interrupt();
      break;
  }
 }
input.close();
return isException;
}