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

java.util.regex.MatchResult.groupCount()
Returns the number of capturing groups in this match result's pattern.
Group zero denotes the entire pattern by convention. It is not included in this count.
Any non-negative integer smaller than or equal to the value returned by this method is guaranteed to be a valid group index for this matcher.
@return The number of capturing groups in this matcher's pattern

        assertEquals(0, result.start());
        assertEquals(4, result.end());
        assertEquals(0, result.start(0));
        assertEquals(4, result.end(0));
        assertEquals("True", result.group());
        assertEquals(0, result.groupCount());
        assertFalse(s.nextBoolean());
        try {
            s.nextBoolean();
            fail("should throw NoSuchElementException");
        } catch (NoSuchElementException e) {

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        assertEquals(0, result.start());
        assertEquals(4, result.end());
        assertEquals(0, result.start(0));
        assertEquals(4, result.end(0));
        assertEquals("True", result.group());
        assertEquals(0, result.groupCount());
        s.close();
        try {
            s.nextBoolean();
            fail("should throw IllegalStateException");
        } catch (IllegalStateException e) {

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        assertEquals(0, result.start());
        assertEquals(4, result.end());
        assertEquals(0, result.start(0));
        assertEquals(4, result.end(0));
        assertEquals("True", result.group());
        assertEquals(0, result.groupCount());
        
        s = new Scanner("True fase");
        assertTrue(s.nextBoolean());
        assertEquals(0, result.groupCount());
        try {

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        assertEquals("True", result.group());
        assertEquals(0, result.groupCount());
        
        s = new Scanner("True fase");
        assertTrue(s.nextBoolean());
        assertEquals(0, result.groupCount());
        try {
            s.nextBoolean();
            fail("Should throw InputMismatchException");
        } catch (InputMismatchException e) {
            // expected

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        assertEquals(0, result.start());
        assertEquals(4, result.end());
        assertEquals(0, result.start(0));
        assertEquals(4, result.end(0));
        assertEquals("True", result.group());
        assertEquals(0, result.groupCount());
        
    }
     
    /**
     * @throws IOException

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        Scanner scanner = new Scanner( new ByteArrayInputStream( message.getBytes() ) );
        String foundString = scanner.findWithinHorizon( ".*line (\\d+):(\\d+): *([^\\n]*).*", message.length() ); //$NON-NLS-1$
        if ( foundString != null )
        {
            MatchResult result = scanner.match();
            if ( result.groupCount() == 3 )
            {
                ExceptionMessage exceptionMessage = new ExceptionMessage();
                exceptionMessage.lineNumber = result.group( 1 );
                exceptionMessage.columnNumber = result.group( 2 );
                exceptionMessage.cause = result.group( 3 );

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      Matcher matcher = pattern.matcher(eventStr);
      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) {
          // apply available format replacements to timestamp
          if (value != null) {
            for (int sp=0; sp < fmt.searchPattern.size(); sp++) {

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      Matcher matcher = pattern.matcher(eventStr);
      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) {
          // apply available format replacements to timestamp
          if (value != null) {
            for (int sp=0; sp < fmt.searchPattern.size(); sp++) {

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        assertEquals(3, result.end());
        assertEquals(2, result.start(0));
        assertEquals(3, result.end(0));
        assertEquals("2", result.group());
        assertEquals("2", result.group(0));
        assertEquals(0, result.groupCount());
        try {
            result.start(1);
            fail("should throw IndexOutOfBoundsException");
        } catch (IndexOutOfBoundsException e) {
            // Expected

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        assertEquals(0, result.start());
        assertEquals(4, result.end());
        assertEquals(0, result.start(0));
        assertEquals(4, result.end(0));
        assertEquals("True", result.group());
        assertEquals(0, result.groupCount());
        assertFalse(s.nextBoolean());
        try {
            s.nextBoolean();
            fail("should throw NoSuchElementException");
        } catch (NoSuchElementException e) {

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