Regular expressions: start End : Pattern « Regular Expressions « Java

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Java » Regular Expressions » PatternScreenshots 
Regular expressions: start End
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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15. Use a character set
16. Adding Comments to a Regular Expression
17. The inline modifier can also contain pattern characters using the form (?x:abc)
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31. Matcher.end(): find the end point
32. Find the end point of the second 'test'
33. Using the find() Method from Matcher
34. Using the find(int) Method
35. Using the lookingAt Method
36. Possessive Qualifier Example
37. Simple Positive Lookahead
38. Finding Every Occurrence of the Letter A
39. Simple Negative Lookahead
40. Simple Positive Lookbehind
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43. Implement a pattern matcher for regular expressions
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