// strings/ThreatAnalyzer.java

// (c)2021 MindView LLC: see Copyright.txt

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com for more book information.

import java.util.regex.*;

import java.util.*;

public class ThreatAnalyzer {

static String threatData =

"58.27.82.161@08/10/2015\n" +

"204.45.234.40@08/11/2015\n" +

"58.27.82.161@08/11/2015\n" +

"58.27.82.161@08/12/2015\n" +

"58.27.82.161@08/12/2015\n" +

"[Next log section with different data format]";

public static void main(String[] args) {

Scanner scanner = new Scanner(threatData);

String pattern = "(\\d+[.]\\d+[.]\\d+[.]\\d+)@" +

"(\\d{2}/\\d{2}/\\d{4})";

while(scanner.hasNext(pattern)) {

scanner.next(pattern);

MatchResult match = scanner.match();

String ip = match.group(1);

String date = match.group(2);

System.out.format(

"Threat on %s from %s%n", date,ip);

}

}

}

/* Output:

Threat on 08/10/2015 from 58.27.82.161

Threat on 08/11/2015 from 204.45.234.40

Threat on 08/11/2015 from 58.27.82.161

Threat on 08/12/2015 from 58.27.82.161

Threat on 08/12/2015 from 58.27.82.161

*/