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

java.util.regex.Matcher.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

    Pattern pattern = Pattern.compile(regex);


    Matcher matcher = pattern.matcher(value);


    while (matcher.find()) {
      String sysKey = matcher.group(1);
      String p = pre + sysKey + post;
      String v = sysKey.equalsIgnoreCase("user.appdata") ? System.getenv("appdata") : System.getProperty(sysKey,"UNKNOWN");
      
      // We habe to replace '\' and '$' signs before replacement
      // see: http://java.sun.com/j2se/1.4.2/docs/api/java/util/regex/Matcher.html#replaceAll(java.lang.String)

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      String line=reader.readLine();


      while (line != null) {
        matcher=pluginTypePattern.matcher(line);
        if (matcher.find()) { // new plugin
          String type=matcher.group(1);
          String className=matcher.group(2);


          if ("plugin".equals(type)) {
            curItem=new PluginSoftwareUpdateItem(className);
          }

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      while (line != null) {
        matcher=pluginTypePattern.matcher(line);
        if (matcher.find()) { // new plugin
          String type=matcher.group(1);
          String className=matcher.group(2);


          if ("plugin".equals(type)) {
            curItem=new PluginSoftwareUpdateItem(className);
          }
          else if ("dataservice".equals(type)) {

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        }
        else {
          matcher=keyValuePattern.matcher(line);


          if (matcher.find()) { // new plugin
            String value = matcher.group(2);
            value = value.replaceAll("\\\\", ""); // fix wrong HTML encoding in plugin descriptions


            if(curItem != null) {
              curItem.addProperty(matcher.group(1), value);
            }

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          if (matcher.find()) { // new plugin
            String value = matcher.group(2);
            value = value.replaceAll("\\\\", ""); // fix wrong HTML encoding in plugin descriptions


            if(curItem != null) {
              curItem.addProperty(matcher.group(1), value);
            }
          }
        }
        line=reader.readLine();
      }

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      if (m[i].getName().equals("getClass")) continue;
      if (m[i].getParameterTypes().length > 0) continue;
      Matcher r = p.matcher(m[i].getName());
      if (r.matches()) {
        try {
          values.put(r.group(1).toLowerCase(), m[i].invoke(bean, new Object[0]));
        } catch (IllegalArgumentException e) {
          throw e;
        } catch (IllegalAccessException e) {
          throw new RuntimeException(e);
        } catch (InvocationTargetException e) {

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    Matcher matcher;


    pattern = Pattern.compile("bc://bt/([a-z0-9=\\+/]+)", Pattern.CASE_INSENSITIVE);
    matcher = pattern.matcher(text.replaceAll(" ", "+"));
    if (matcher.find()) {
      String base64 = matcher.group(1);
      byte[] decode = Base64.decode(base64);
      if (decode != null && decode.length > 0) {
        // Format is AA/<name>/<size>/<hash>/ZZ
        try {
          String decodeString = new String(decode, "utf8");

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        try {
          String decodeString = new String(decode, "utf8");
          pattern = Pattern.compile("AA.*/(.*)/ZZ", Pattern.CASE_INSENSITIVE);
          matcher = pattern.matcher(decodeString);
          if (matcher.find()) {
            String hash = matcher.group(1);
            String magnet = parseTextForMagnets(hash);
            if (magnet != null) {
              pattern = Pattern.compile("AA/(.*)/[0-9]+", Pattern.CASE_INSENSITIVE);
              matcher = pattern.matcher(decodeString);
              if (matcher.find()) {

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            String magnet = parseTextForMagnets(hash);
            if (magnet != null) {
              pattern = Pattern.compile("AA/(.*)/[0-9]+", Pattern.CASE_INSENSITIVE);
              matcher = pattern.matcher(decodeString);
              if (matcher.find()) {
                String name = matcher.group(1);
                return magnet + "&dn=" + encode(name);
              }
              return magnet;
            }
          }

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    pattern = Pattern.compile("bctp://task/(.*)", Pattern.CASE_INSENSITIVE);
    matcher = pattern.matcher(text);
    if (matcher.find()) {
      // Format is <name>/<size>/<hash>
      String decodeString = matcher.group(1);
      String magnet = parseTextForMagnets(decodeString);
      if (magnet != null) {
        pattern = Pattern.compile("(.*)/[0-9]+", Pattern.CASE_INSENSITIVE);
        matcher = pattern.matcher(decodeString);
        if (matcher.find()) {

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