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java.util.regex
Class Pattern

java.lang.Object
  extended by java.util.regex.Pattern
All Implemented Interfaces:
Serializable
See Also:
Top Examples, Source Code, matches, matches, matcher, compile, character sequences 
public static final int CANON_EQ
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public static final int CASE_INSENSITIVE
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UNICODE_CASE
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[241]Create a pattern that describes any word beginning with Java
By Anonymous on 2004/07/19 17:04:57  Rate
// Create a pattern that describes any word beginning with "Java", and 
 // which also "captures" whatever suffix follows the "Java" prefix. It 
 // uses the CASE_INSENSITIVE flag, so it matches any capitalization 
 Pattern p = Pattern.compile ( "\\bJava ( \\w* ) ", Pattern.CASE_INSENSITIVE ) ; 
 // This is a sentence we want to compare the pattern to. 
 String text = "Java is fun; JavaScript is funny."; 
 // Create a Matcher object to compare the pattern to the text 
 Matcher m = p.matcher ( text ) ; 
 // Now loop to find all matches of the pattern in the text 
 while ( m.find (  )  )   {  
   // For each match, print the text that matched the pattern, and its 
   // position within the string 
   System.out.println ( "Found '" + m.group ( 0 )  + "' at position " + m.start ( 0 )  ) ; 
   // Also, if there was a suffix, print the suffix. 
   if  ( m.start ( 1 )   <  m.end ( 1 )  )  System.out.println ( "Suffix is " + m.group ( 1 )  ) ; 
  }  
 

[886]Create a pattern, and print the matches
By linuxsen on 2005/10/14 15:27:34  Rate
import java.util.prefs.*; 
 import java.math.*; 
 import java.util.regex.*; 
  
  
 public class RegTest5 
  {  
   public static void main ( String arg [  ]  )  
    {  
     Pattern p = Pattern.compile ( "\\bJ ( \\w* ) ", Pattern.CASE_INSENSITIVE ) ; //  ( \\w* )  //, Pattern.CASE_SENSITIVE 
     String text = "Java is fun; JavaScript is funny.; JFunny ; just";  
     Matcher m = p.matcher ( text ) ;  
     while ( m.find (  )  )   {   
       System.out.println ( "Found '" + m.group ( 0 )  + "' at position " + m.start ( 0 )  +"-" + m.end ( 0 )  ) ;  
       if  ( m.start ( 0 )   <  m.end ( 0 )  )  System.out.println ( "Suffix is " + m.group ( 1 )  ) ;  
      }  
    }   
  
  
  } 
public static final int COMMENTS
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public static Pattern compile(String regex)
See Also:
PatternSyntaxException
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[525]Create a case insensitive pattern
By Anonymous on 2003/11/17 09:54:37  Rate
import java.util.regex.*; 
 Matcher matcher = null; 
  
  
 try  {  
     Pattern p = 
     Pattern.compile ( regExp, Pattern.CASE_INSENSITIVE ) ; 
     matcher = p.matcher ( inputString ) ; 
  }  catch  ( PatternSyntaxException pse )   {  
 // Handle exception 
  }  catch  ( IllegalArgumentException iae )   {  
 // Handle exception 
  }  
  
  
 if  ( matcher.matches (  )  == true )  
     System.out.println ( "Input string matches!" ) ;
public static Pattern compile(String regex,
                              int flags)
See Also:
PatternSyntaxException, IllegalArgumentException, CANON_EQ, UNICODE_CASE, DOTALL, MULTILINE, CASE_INSENSITIVE
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[1921]Simple regular expression test utility
By Anonymous on 2007/08/15 11:14:54  Rate
import java.io.Console; 
 import java.util.regex.Pattern; 
 import java.util.regex.Matcher; 
  
  
 public class RegexTestHarness  {  
  
  
     public static void main ( String [  ]  args )  {  
         Console console = System.console (  ) ; 
         if  ( console == null )   {  
             System.err.println ( "No console." ) ; 
             System.exit ( 1 ) ; 
          }  
         while  ( true )   {  
  
  
             Pattern pattern =  
             Pattern.compile ( console.readLine ( "%nEnter your regex: " )  ) ; 
  
  
             Matcher matcher =  
             pattern.matcher ( console.readLine ( "Enter input string to search: " )  ) ; 
  
  
             boolean found = false; 
             while  ( matcher.find (  )  )   {  
                 console.format ( "I found the text \"%s\" starting at " + 
                    "index %d and ending at index %d.%n", 
                     matcher.group (  ) , matcher.start (  ) , matcher.end (  )  ) ; 
                 found = true; 
              }  
             if ( !found )  {  
                 console.format ( "No match found.%n" ) ; 
              }  
          }  
      }  
  }  
 
public static final int DOTALL
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public int flags()
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public static final int LITERAL
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public Matcher matcher(CharSequence input)
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public static boolean matches(String regex,
                              CharSequence input)
See Also:
PatternSyntaxException
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public static final int MULTILINE
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public String pattern()
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public static String quote(String s)
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public String[] split(CharSequence input)
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split
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[1230]Split a string
By Anonymous on 2004/12/27 19:49:12  Rate
/* 
  * Uses split to break up a string of input separated by 
  * commas and/or whitespace. 
  */ 
  
  
 // Create a pattern to match breaks 
 Pattern p = Pattern.compile ( " [ ,\\s ] +" ) ; 
 // Split input with the pattern 
 String [  ]  result = p.split ( "one,two, three four , five" ) ; 
 for  ( int i=0; i < result.length; i++ )  
     System.out.println ( result [ i ]  ) ; 
 

[1922]Split to get the text that falls on either side of any regular expression
By Anonymous on 2007/08/15 11:19:47  Rate
Since we're still using Pattern and Matcher objects, you can use split to get the text that falls on either side of any regular expression. Here's the example to split on digits instead: 
  
  
     import java.util.regex.Pattern; 
     import java.util.regex.Matcher; 
  
  
     public class SplitDemo2  {  
  
  
         private static final String REGEX = "\\d"; 
         private static final String INPUT = "one9two4three7four1five"; 
  
  
         public static void main ( String [  ]  args )   {  
             Pattern p = Pattern.compile ( REGEX ) ; 
             String [  ]  items = p.split ( INPUT ) ; 
             for ( String s : items )   {  
                 System.out.println ( s ) ; 
              }  
          }  
      }  
  
  
     OUTPUT: 
  
  
     one 
     two 
     three 
     four 
     five
public String[] split(CharSequence input,
                      int limit)
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public String toString()
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Object
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public static final int UNICODE_CASE
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CASE_INSENSITIVE
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[219]Pattern test case
By shuu373 { at } oki { dot } com on 2003/04/11 03:58:06  Rate
import java.util.regex.Pattern; 
  
  
 import junit.framework.TestCase; 
  
  
 /* 
  * Created on 2003/04/11 
  * 
  * To change the template for this generated file go to 
  * Window > Preferences > Java > Code Generation > Code and Comments 
  */ 
  
  
 public class PatternTestCase extends TestCase  {  
  
  
   /** 
    * Constructor for PatternTestCase. 
    * @param arg0 
    */ 
   public PatternTestCase ( String arg0 )   {  
     super ( arg0 ) ; 
    }  
    
   public void testPattern (  )  {  
     String s = "\\p { InHiragana } "; 
     String str = "?????????????????????????????????????????????????????????"; 
     Pattern pattern = Pattern.compile (  s , Pattern.UNICODE_CASE  ) ; 
     String [  ]  result = pattern.split (  str  ) ; 
     for ( int index = 0;index  <  result.length ;index ++ )  {  
       System.out.println ( result [ index ]  ) ; 
      }  
    }  
  
  
  }  
 
public static final int UNIX_LINES
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