public int end()
Returns the offset after the last character matched.  

 public int end(int group)
Returns the offset after the last character of the subsequence
captured by the given group during this match.

 Capturing groups are indexed from left
to right, starting at one.  Group zero denotes the entire pattern, so
the expression m.end(0) is equivalent to
m.end().  

 public String 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.  

 public String group(int group)
Returns the input subsequence captured by the given group during the
previous match operation.

 For a matcher m, input sequence s, and group index
g, the expressions m.group(g) and
s.substring(m.start(g), m.end(g))
are equivalent.  

 Capturing groups are indexed from left
to right, starting at one.  Group zero denotes the entire pattern, so
the expression m.group(0) is equivalent to m.group().


 If the match was successful but the group specified failed to match
any part of the input sequence, then null is returned. Note
that some groups, for example (a*), match the empty string.
This method will return the empty string when such a group successfully
matches the empty string in the input.  

 public int 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.  

 public int start()
Returns the start index of the match.

 public int start(int group)
Returns the start index of the subsequence captured by the given group
during this match.

 Capturing groups are indexed from left
to right, starting at one.  Group zero denotes the entire pattern, so
the expression m.start(0) is equivalent to
m.start().