本文整理了Java中java.util.regex.Matcher.groupCount()方法的一些代码示例，展示了Matcher.groupCount()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Matcher.groupCount()方法的具体详情如下：
包路径：java.util.regex.Matcher
类名称：Matcher
方法名：groupCount

Matcher.groupCount介绍

[英]Returns the number of groups in the results, which is always equal to the number of groups in the original regular expression.
[中]返回结果中的组数，它始终等于原始正则表达式中的组数。

代码示例

代码示例来源：origin: libgdx/libgdx

private String getError (String line) {
  Pattern pattern = Pattern.compile(":[0-9]+:[0-9]+:(.+)");
  Matcher matcher = pattern.matcher(line);
  matcher.find();
  return matcher.groupCount() >= 1 ? matcher.group(1).trim() : null;
}

代码示例来源：origin: gocd/gocd

private String[] extractArguments(Matcher matcher) {
  String[] args = new String[matcher.groupCount()];
  for (int i = 1; i <= matcher.groupCount(); i++) {
    args[i - 1] = matcher.group(i);
  }
  return args;
}

代码示例来源：origin: google/j2objc

/**
  * Return the count of groups in the argument.
  * @param p pattern whose groups to count
  * @return the count of groups in the argument
  */
 @SuppressWarnings("purity") // does not depend on object identity
 /*@Pure*/
 private static int getGroupCount(Pattern p) {
  return p.matcher("").groupCount();
 }
}

代码示例来源：origin: apache/hbase

/**
 * @param fileName Sting version of path to validate.
 * @return True if the file name has format of a del file.
 */
public static boolean isDelFile(final String fileName) {
 Matcher m = DELFILE_NAME_PATTERN.matcher(fileName);
 return m.matches() && m.groupCount() > 0;
}

代码示例来源：origin: apache/flume

@Override
public void configure(Context context) {
 String regexString = context.getString(REGEX);
 Preconditions.checkArgument(!StringUtils.isEmpty(regexString),
   "Must supply a valid regex string");
 regex = Pattern.compile(regexString);
 regex.pattern();
 regex.matcher("").groupCount();
 configureSerializers(context);
}

代码示例来源：origin: Graylog2/graylog2-server

@Override
protected Result[] run(String value) {
  final Matcher matcher = pattern.matcher(value);
  if (!matcher.find() || matcher.groupCount() == 0 || matcher.start(1) == -1 || matcher.end(1) == -1) {
    return null;
  }
  return new Result[] { new Result(value.substring(matcher.start(1), matcher.end(1)), matcher.start(1), matcher.end(1)) };
}

代码示例来源：origin: stackoverflow.com

Matcher m = responseCodePattern.matcher(firstHeader);
m.matches();
m.groupCount();
m.group(0); //must call matches() first
...

代码示例来源：origin: libgdx/libgdx

private int getLineNumber (String line) {
    Pattern pattern = Pattern.compile(":([0-9]+):[0-9]+:");
    Matcher matcher = pattern.matcher(line);
    matcher.find();
    return matcher.groupCount() >= 1 ? Integer.parseInt(matcher.group(1)) : -1;
  }
});

代码示例来源：origin: apache/hbase

/**
 * @param name file name to check.
 * @return True if the path has format of a HStoreFile reference.
 */
public static boolean isReference(final String name) {
 Matcher m = REF_NAME_PATTERN.matcher(name);
 return m.matches() && m.groupCount() > 1;
}

代码示例来源：origin: apache/nifi

public RegexReplace(final byte[] buffer, final ProcessContext context) {
  this.buffer = buffer;
  final String regexValue = context.getProperty(SEARCH_VALUE).evaluateAttributeExpressions().getValue();
  numCapturingGroups = Pattern.compile(regexValue).matcher("").groupCount();
  additionalAttrs = new HashMap<>(numCapturingGroups);
}

代码示例来源：origin: Graylog2/graylog2-server

public Result runExtractor(String value) {
  final Matcher matcher = pattern.matcher(value);
  final boolean found = matcher.find();
  if (!found) {
    return null;
  }
  final int start = matcher.groupCount() > 0 ? matcher.start(1) : -1;
  final int end = matcher.groupCount() > 0 ? matcher.end(1) : -1;
  final String s;
  try {
    s = replaceAll ? matcher.replaceAll(replacement) : matcher.replaceFirst(replacement);
  } catch (Exception e) {
    throw new RuntimeException("Error while trying to replace string", e);
  }
  return new Result(s, start, end);
}

代码示例来源：origin: code4craft/webmagic

/**
 * Create a RegexSelector. When there is no capture group, the value is set to 0 else set to 1.
 * @param regexStr
 */
public RegexSelector(String regexStr) {
  this.compileRegex(regexStr);
  if (regex.matcher("").groupCount() == 0) {
    this.group = 0;
  } else {
    this.group = 1;
  }
}

代码示例来源：origin: gocd/gocd

private String contentsOfFirstGroupThatMatched(Matcher matcher) {
  for (int i = 1; i <= matcher.groupCount(); i++) {
    String groupContent = matcher.group(i);
    if (groupContent != null) {
      return groupContent;
    }
  }
  return null;
}

代码示例来源：origin: libgdx/libgdx

private String getError (String line) {
  Pattern pattern = Pattern.compile(":[0-9]+:[0-9]+:(.+)");
  Matcher matcher = pattern.matcher(line);
  matcher.find();
  return matcher.groupCount() >= 1 ? matcher.group(1).trim() : null;
}

代码示例来源：origin: apache/hbase

public static boolean isHFile(final String fileName) {
 Matcher m = HFILE_NAME_PATTERN.matcher(fileName);
 return m.matches() && m.groupCount() > 0;
}

代码示例来源：origin: apache/nifi

private ReplaceTextCallback(ProcessContext context, FlowFile flowFile, int maxBufferSize) {
  this.regex = context.getProperty(REGEX).evaluateAttributeExpressions(flowFile, quotedAttributeDecorator).getValue();
  this.flowFile = flowFile;
  this.charset = Charset.forName(context.getProperty(CHARACTER_SET).getValue());
  final String regexValue = context.getProperty(REGEX).evaluateAttributeExpressions().getValue();
  this.numCapturingGroups = Pattern.compile(regexValue).matcher("").groupCount();
  this.buffer = new byte[maxBufferSize];
  this.groupToMatch = context.getProperty(MATCHING_GROUP_FOR_LOOKUP_KEY).evaluateAttributeExpressions().asInteger();
}

代码示例来源：origin: hibernate/hibernate-orm

/**
 * Get the starting point for the limit handler to begin injecting and transforming the SQL.
 * For non-CTE queries, this is offset 0.  For CTE queries, this will be where the CTE's
 * SELECT clause begins (skipping all query definitions, column definitions and expressions).
 *
 * This method also sets {@code isCTE} if the query is parsed as a CTE query.
 *
 * @param sql The sql buffer.
 * @return the index where to begin parsing.
 */
private int getStatementIndex(StringBuilder sql) {
  final Matcher matcher = WITH_CTE.matcher( sql.toString() );
  if ( matcher.find() && matcher.groupCount() > 0 ) {
    isCTE = true;
    return locateQueryInCTEStatement( sql, matcher.end() );
  }
  return 0;
}

代码示例来源：origin: gocd/gocd

private String contentsOfFirstGroupThatMatched(Matcher matcher) {
  for (int i = 1; i <= matcher.groupCount(); i++) {
    String groupContent = matcher.group(i);
    if (groupContent != null) {
      return groupContent;
    }
  }
  return null;
}

代码示例来源：origin: libgdx/libgdx

private int getLineNumber (String line) {
    Pattern pattern = Pattern.compile(":([0-9]+):[0-9]+:");
    Matcher matcher = pattern.matcher(line);
    matcher.find();
    return matcher.groupCount() >= 1 ? Integer.parseInt(matcher.group(1)) : -1;
  }
});

代码示例来源：origin: apache/kafka

String apply(String distinguishedName) {
  if (isDefault) {
    return distinguishedName;
  }
  String result = null;
  final Matcher m = pattern.matcher(distinguishedName);
  if (m.matches()) {
    result = distinguishedName.replaceAll(pattern.pattern(), escapeLiteralBackReferences(replacement, m.groupCount()));
  }
  if (toLowerCase && result != null) {
    result = result.toLowerCase(Locale.ENGLISH);
  } else if (toUpperCase & result != null) {
    result = result.toUpperCase(Locale.ENGLISH);
  }
  return result;
}