How to check on-thy-fly dynamic txt-files

Question

hello.
i want to check out a dynamic txt-file (dynamic, because it is a running log from a chat) for specific words.
the program should start to check the incoming content at the actual end of the file(previous content is in this case uninteresting) and shouldn't stop to do that(unless i want it).
my problem is, that the program stops after it reachs the end of the file.
any idea?
many thx.
try
          String zeile;
//Wir lesen aus "eingabe.txt".
          File eingabeDatei = new File(new URI("file:///C:/Log.txt"));
FileReader eingabeStrom = new FileReader(eingabeDatei);
BufferedReader eingabe = new BufferedReader(eingabeStrom);
while ((zeile = eingabe.readLine()) != null)
     Pattern p = Pattern.compile("TESTWORD");
// Muster: Ziffer, mind. ein Buchstabe, Ziffer
Matcher m = p.matcher(zeile);
if (m.find())
     Robot rob = new Robot();
     rob.keyPress( '1' );
System.out.println (m.group());
     System.out.println("Pattern at Pos. " + m.start());
System.out.println("Pattern is: " + m.group());
else
System.out.println("***No pattern found***");
//System.out.println(zeile);
} catch (IOException e)
e.printStackTrace();
}

Answer 1

hello.
i want to check out a dynamic txt-file (dynamic,
because it is a running log from a chat) for specific
words.
the program should start to check the incoming
content at the actual end of the file(previous
content is in this case uninteresting) and shouldn't
stop to do that(unless i want it).
my problem is, that the program stops after it reachs
the end of the file.
any idea?
many thx.
Please use the code tag next time you post code. Thanks.
(see more comments below)
try {
     String zeile;
     //Wir lesen aus "eingabe.txt".
     File eingabeDatei = new File(new URI("file:///C:/Log.txt"));
     FileReader eingabeStrom = new FileReader(eingabeDatei);
     BufferedReader eingabe = new BufferedReader(eingabeStrom);
     while ((zeile = eingabe.readLine()) != null)
          Pattern p = Pattern.compile("TESTWORD");
          // Muster: Ziffer, mind. ein Buchstabe, Ziffer
          Matcher m = p.matcher(zeile);
          if (m.find())
               Robot rob = new Robot();
               rob.keyPress( '1' );
               System.out.println (m.group());
               System.out.println("Pattern at Pos. " + m.start());
               System.out.println("Pattern is: " + m.group());
          else
               System.out.println("***No pattern found***");
          //System.out.println(zeile);
catch (IOException e) {
     e.printStackTrace();
}The line:
while ((zeile = eingabe.readLine()) != null)is why your app quits. The while loop ends on null which happens when there is nothing to read from the reader
From the API:
Returns:
A String containing the contents of the line, not including any line-termination characters, or null if the end of the stream has been reached.