Regular expressions: start End

 
// : 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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14.	Use enclosing form
15.	Use a character set
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17.	The inline modifier can also contain pattern characters using the form (?x:abc)
18.	Use an inline modifier: (?x)a [\\ ] b
19.	Use an inline modifier: x)a \\s b
20.	Use an inline modifier: a (?x: b)
21.	Tabs and newlines in the pattern are ignored as well
22.	Compiling a Pattern with Multiple Flags
23.	Matching Across Line Boundaries in a Regular Expression
24.	Match Duplicate Words
25.	Validation Test With Pattern And Matcher
26.	Match one or more
27.	Matcher.reset: restart
28.	Matcher.reset(CharSequence)
29.	Matcher.start(): Find the starting point
30.	Matcher.start(int) Example
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34.	Using the find(int) Method
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36.	Possessive Qualifier Example
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38.	Finding Every Occurrence of the Letter A
39.	Simple Negative Lookahead
40.	Simple Positive Lookbehind
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42.	Find all matches
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Regular expressions: start End : Pattern « Regular Expressions « Java

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