Question

Hi I’ve got a log file containing trace routes and pings.
Ive seperated these by using

if (scanner.nextLine ().startsWith ("64 bytes"){}

so I can work with just the pings for now.

All I’m interested in from the ping is time=XX

example data line =

64 bytes from ziva.zarnet.ac.zw (209.88.89.132): icmp_seq=119 ttl=46 time=199 ms

I have been reading other peoples similar questions and I’m not sure how to apply to mine.

I literally need just the numbers as I will be putting them into a csv file so I can make a graph of the data.

edit: Using robins solution I’m now having my pings being spurted out on screen, except it’s doing every other and missing the first.

 while (scanner.hasNextLine ()) {
   //take only pings.
   if (scanner.nextLine ().startsWith ("64 bytes")){
       String line = scanner.nextLine ();       
       String pingAsString = line.substring (line.lastIndexOf ("=") + 1, (line.length () - "ms".length ()));
       Double ping = Double.valueOf (pingAsString);
       System.out.println ("PING AS STRING = "+ping);
   }
}

OK SORTED. THAT JUST NEEDED TO MOVE LINE ASSIGNMENT. CAPS. but made it clear. 😀

Answer 1

Or you can just use the available methods on String if you do not want to perform reg-ex magic

String line = ...
String pingAsString = line.substring( line.lastIndexOf("=")+1, (line.length() - " ms".length() ) );
Integer ping = Integer.valueOf( pingAsString );