int start()
Returns the start index of the match.
IllegalStateException - If no match has yet been attempted, or if the previous match operation failed
int start(int group)
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().
group - The index of a capturing group in this matcher's pattern
-1 if the match was successful but the group itself did not match anything
IllegalStateException - If no match has yet been attempted, or if the previous match operation failed
IndexOutOfBoundsException - If there is no capturing group in the pattern with the given index
int end()
Returns the offset after the last character matched.
IllegalStateException - If no match has yet been attempted, or if the previous match operation failed
int end(int group)
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().
group - The index of a capturing group in this matcher's pattern
-1 if the match was successful but the group itself did not match anything
IllegalStateException - If no match has yet been attempted, or if the previous match operation failed
IndexOutOfBoundsException - If there is no capturing group in the pattern with the given index
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.
IllegalStateException - If no match has yet been attempted, or if the previous match operation failed
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.
group - The index of a capturing group in this matcher's pattern
null if the group failed to match part of the input
IllegalStateException - If no match has yet been attempted, or if the previous match operation failed
IndexOutOfBoundsException - If there is no capturing group in the pattern with the given index
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.
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