Is there any way i can filter out lines containing a certain word that i do not want? For example an example output would be 

```
E/MediaPlayer( 7616): error (1, -2147483648)
D/MediaPlayer( 7616): create failed:
D/MediaPlayer( 7616): java.io.IOException: Prepare failed.: status=0x1
D/MediaPlayer( 7616):   at android.media.MediaPlayer.prepare(Native Method)
D/MediaPlayer( 7616):   at android.media.MediaPlayer.create(MediaPlayer.java:632)
D/MediaPlayer( 7616):   at android.media.MediaPlayer.create(MediaPlayer.java:609)

```

However i only want the first three lines without the "at" in them to be written into the StringBuilder. Is there any way to filter out lines containing the word "at"?

```
while ((finalresult = bufferedReader.readLine()) != null) {
    log.append("Error for file: "+ location.toString() + " " + finalresult +  "\n");

```