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Scanner s = …;
MatchResult result = s.match();
Based on 45 examples
public interface MatchResult
The result of a match operation.
This interface contains query methods used to determine the
results of a match against a regular expression. The match boundaries,
groups and group boundaries can be seen but not modified through
a MatchResult
.
Method Summary | |
---|---|
int |
end() Returns the offset after the last character matched. |
int |
end(int group) Returns the offset after the last character of the subsequence captured by the given group during this match. |
String |
group() Returns the input subsequence matched by the previous match. |
String |
group(int group) Returns the input subsequence captured by the given group during the previous match operation. |
int |
Returns the number of capturing groups in this match result's pattern. |
int |
start() Returns the start index of the match. |
int |
start(int group) Returns the start index of the subsequence captured by the given group during this match. |
Method Detail |
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public int end()
public 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 patternpublic String group()
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)
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 patternpublic int groupCount()
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()
public 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
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