Java Reference
In-Depth Information
ample is shown in
Figure 4-3
.
Figure 4-3. REDemo2 in action
It is also possible to get the starting and ending indices and the length of the text that the pat-
tern matched (remember that terms with quantifiers, such as the
\d+
in this example, can
match an arbitrary number of characters in the string). You can use these in conjunction with
the
String.substring()
methods as follows:
String patt
=
"Q[^u]\\d+\\."
;
Pattern r
=
Pattern
.
compile
(
patt
);
String line
=
"Order QT300. Now!"
;
Matcher m
=
r
.
matcher
(
line
);
iif
(
m
.
find
()) {
System
.
out
.
println
(
patt
+
" matches \""
+
line
.
substring
(
m
.
start
(
0
),
m
.
end
(
0
)) +
"\" in \""
+
line
+
"\""
);
}
else
else
{
System
.
out
.
println
(
"NO MATCH"
);
}
Suppose you need to extract several items from a string. If the input is:
