Mega Code Archive
Regular expressions
<![CDATA[
// : c12:StartEnd.java
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class StartEnd {
public static void main(String[] args) {
String[] input = new String[] { "Java has regular expressions in 1.4",
"regular expressions now expressing in Java",
"Java represses oracular expressions" };
Pattern p1 = Pattern.compile("re\\w*"), p2 = Pattern.compile("Java.*");
for (int i = 0; i < input.length; i++) {
System.out.println("input " + i + ": " + input[i]);
Matcher m1 = p1.matcher(input[i]), m2 = p2.matcher(input[i]);
while (m1.find())
System.out.println("m1.find() '" + m1.group() + "' start = "
+ m1.start() + " end = " + m1.end());
while (m2.find())
System.out.println("m2.find() '" + m2.group() + "' start = "
+ m2.start() + " end = " + m2.end());
if (m1.lookingAt()) // No reset() necessary
System.out.println("m1.lookingAt() start = " + m1.start()
+ " end = " + m1.end());
if (m2.lookingAt())
System.out.println("m2.lookingAt() start = " + m2.start()
+ " end = " + m2.end());
if (m1.matches()) // No reset() necessary
System.out.println("m1.matches() start = " + m1.start()
+ " end = " + m1.end());
if (m2.matches())
System.out.println("m2.matches() start = " + m2.start()
+ " end = " + m2.end());
}
}
} ///:~
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