Examples of java.util.regex.MatchResult.group()

java.util.regex.MatchResult.group()
Returns the input subsequence matched by the previous match.
For a matcher m with input sequence s, the expressions m.group() and s.substring(m.start(), m.end()) are equivalent.

Note that some patterns, for example a*, match the empty string. This method will return the empty string when the pattern successfully matches the empty string in the input.
@return The (possibly empty) subsequence matched by the previous match,in string form @throws IllegalStateException If no match has yet been attempted, or if the previous match operation failed

      if (! matcher.matches()) {
        continue;
      }
      MatchResult res = matcher.toMatchResult();
      for (int grp=1; grp <= res.groupCount(); grp++) {
        String value = res.group(grp);
        if (grp == SYSLOG_TIMESTAMP_POS) {
          timeStampString = value;


          // apply available format replacements to timestamp
          if (value != null) {

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            } catch (Exception e) {
                System.out.println("Mac header: " + line);
                e.printStackTrace();
                System.exit(1);
            }
            kr.macKeyLen = Integer.parseInt(result.group(1));
            kr.macKey = new byte[kr.macKeyLen];
            state = MacKey;
        }


        void parseResultLine(String line, KatResult kr) {

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                System.out.println("Header line: " + line);
                e.printStackTrace();
                System.exit(1);
            }


            kr.stateSize = Integer.parseInt(result.group(1));
            kr.hashBitLength = Integer.parseInt(result.group(2));
            kr.msgLength = Integer.parseInt(result.group(3));
            kr.restOfLine = result.group(4);


            if ((kr.msgLength == 0) || (kr.msgLength % 8) != 0)

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                e.printStackTrace();
                System.exit(1);
            }


            kr.stateSize = Integer.parseInt(result.group(1));
            kr.hashBitLength = Integer.parseInt(result.group(2));
            kr.msgLength = Integer.parseInt(result.group(3));
            kr.restOfLine = result.group(4);


            if ((kr.msgLength == 0) || (kr.msgLength % 8) != 0)
                kr.msg = new byte[(kr.msgLength >> 3) + 1];

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                System.exit(1);
            }


            kr.stateSize = Integer.parseInt(result.group(1));
            kr.hashBitLength = Integer.parseInt(result.group(2));
            kr.msgLength = Integer.parseInt(result.group(3));
            kr.restOfLine = result.group(4);


            if ((kr.msgLength == 0) || (kr.msgLength % 8) != 0)
                kr.msg = new byte[(kr.msgLength >> 3) + 1];
            else

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            }


            kr.stateSize = Integer.parseInt(result.group(1));
            kr.hashBitLength = Integer.parseInt(result.group(2));
            kr.msgLength = Integer.parseInt(result.group(3));
            kr.restOfLine = result.group(4);


            if ((kr.msgLength == 0) || (kr.msgLength % 8) != 0)
                kr.msg = new byte[(kr.msgLength >> 3) + 1];
            else
                kr.msg = new byte[kr.msgLength >> 3];

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            int proxyPort = 8080;
            try {
                s.findInLine("(http://|)([^:/]+)(:|)([0-9]*)(/|)");
                MatchResult m = s.match();
                if (m.groupCount() >= 2) {
                    proxyAddr = m.group(2);
                }
                if ((m.groupCount() >= 4) && (!m.group(4).isEmpty())) {
                    proxyPort = Integer.parseInt(m.group(4));
                }
            } finally {

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                s.findInLine("(http://|)([^:/]+)(:|)([0-9]*)(/|)");
                MatchResult m = s.match();
                if (m.groupCount() >= 2) {
                    proxyAddr = m.group(2);
                }
                if ((m.groupCount() >= 4) && (!m.group(4).isEmpty())) {
                    proxyPort = Integer.parseInt(m.group(4));
                }
            } finally {
                s.close();
            }

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                MatchResult m = s.match();
                if (m.groupCount() >= 2) {
                    proxyAddr = m.group(2);
                }
                if ((m.groupCount() >= 4) && (!m.group(4).isEmpty())) {
                    proxyPort = Integer.parseInt(m.group(4));
                }
            } finally {
                s.close();
            }
            if (proxyAddr != null) {

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      } catch (IllegalStateException e) {
        // Ignore and move on ..
        continue;
      }
      for (int grp=1; grp <= res.groupCount(); grp++) {
        String value = res.group(grp);
        if (grp == SYSLOG_TIMESTAMP_POS) {
          // apply available format replacements to timestamp
          if (value != null) {
            for (int sp=0; sp < fmt.searchPattern.size(); sp++) {
              value = value.replaceAll(fmt.searchPattern.get(sp), fmt.replacePattern.get(sp));

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