java.lang.Object
java.util.regex.Matcher
- All Implemented Interfaces:
- MatchResult
- See Also:
- Top Examples, Source Code,
reset(CharSequence), reset(), IllegalStateException, replaceAll, appendTail, appendReplacement, useTransparentBounds, useAnchoringBounds, regionEnd, regionStart, region, find, lookingAt, matches, matcher,
public Matcher appendReplacement(StringBuffer sb,
String replacement)- See Also:
- IndexOutOfBoundsException, IllegalStateException,
find, appendTail, group, end(), start()
- Geek's Notes:
- Description Add your codes or notes Search More Java Examples
[1231]Use pattern matcher to replace a string
By Anonymous on 2005/03/29 08:27:37 Rate
// Create a pattern to match cat
Pattern p = Pattern.compile ( "cat" ) ;
// Create a matcher with an input string
Matcher m = p.matcher ( "one cat," +
" two cats in the yard" ) ;
StringBuffer sb = new StringBuffer ( ) ;
boolean result = m.find ( ) ;
// Loop through and create a new String
// with the replacements
while ( result ) {
m.appendReplacement ( sb, "dog" ) ;
result = m.find ( ) ;
}
// Add the last segment of input to
// the new String
m.appendTail ( sb ) ;
System.out.println ( sb.toString ( ) ) ;
[1781]match special string
By Anonymous on 2006/06/23 01:45:41 Rate
public static void main ( String args [ ] ) {
String prex="default";
Pattern p = Pattern.compile ( "^"+prex+" ( \\d+ ) $" ) ;
String line="default0001";
Matcher m = p.matcher ( line ) ;
if ( m.find ( ) == true ) //line matches the above pattern ?
{
System.out.println ( m.group ( 1 ) ) ; // [ A-Z ] [ ^\\s ] +
} else {
System.out.println ( "the line is not matched!" ) ;
}
}
public StringBuffer appendTail(StringBuffer sb)
- See Also:
appendReplacement
- Geek's Notes:
- Description Add your codes or notes Search More Java Examples
public int end()
- See Also:
- IllegalStateException, MatchResult
- Geek's Notes:
- Description Add your codes or notes Search More Java Examples
public int end(int group)
- See Also:
- IndexOutOfBoundsException, IllegalStateException, MatchResult
- Geek's Notes:
- Description Add your codes or notes Search More Java Examples
public boolean find()
- Geek's Notes:
- Description Add your codes or notes Search More Java Examples
[1279]Problem with mathcher.find
By Anonymous on 2005/04/24 09:41:02 Rate
my regex is "\\W*"
my string is se
i do mathcher.find ( ) -this one return false.
Why?[1525]_
By Mark on 2005/08/30 06:48:28 Rate
\W = A non-word character: [ ^\w ]
public boolean find(int start)
- See Also:
- IndexOutOfBoundsException,
find()
- Geek's Notes:
- Description Add your codes or notes Search More Java Examples
public String group()
- See Also:
- IllegalStateException, MatchResult
- Geek's Notes:
- Description Add your codes or notes Search More Java Examples
public String group(int group)
- See Also:
- IndexOutOfBoundsException, IllegalStateException, MatchResult
- Geek's Notes:
- Description Add your codes or notes Search More Java Examples
public int groupCount()
- See Also:
- MatchResult
- Geek's Notes:
- Description Add your codes or notes Search More Java Examples
public boolean hasAnchoringBounds()
- See Also:
useAnchoringBounds(boolean)
- Geek's Notes:
- Description Add your codes or notes Search More Java Examples
public boolean hasTransparentBounds()
- See Also:
useTransparentBounds(boolean)
- Geek's Notes:
- Description Add your codes or notes Search More Java Examples
public boolean hitEnd()
- Geek's Notes:
- Description Add your codes or notes Search More Java Examples
public boolean lookingAt()
- See Also:
matches
- Geek's Notes:
- Description Add your codes or notes Search More Java Examples
[1924]Difference between the matches and lookingAt Methods
By Anonymous on 2007/08/15 11:24:33 Rate
The matches and lookingAt methods both attempt to match an input sequence against a pattern. The difference, however, is that matches requires the entire input sequence to be matched, while lookingAt does not. Both methods always start at the beginning of the input string.
import java.util.regex.Pattern;
import java.util.regex.Matcher;
public class MatchesLooking {
private static final String REGEX = "foo";
private static final String INPUT = "fooooooooooooooooo";
private static Pattern pattern;
private static Matcher matcher;
public static void main ( String [ ] args ) {
// Initialize
pattern = Pattern.compile ( REGEX ) ;
matcher = pattern.matcher ( INPUT ) ;
System.out.println ( "Current REGEX is: "+REGEX ) ;
System.out.println ( "Current INPUT is: "+INPUT ) ;
System.out.println ( "lookingAt ( ) : "+matcher.lookingAt ( ) ) ;
System.out.println ( "matches ( ) : "+matcher.matches ( ) ) ;
}
}
Current REGEX is: foo
Current INPUT is: fooooooooooooooooo
lookingAt ( ) : true
matches ( ) : false
public boolean matches()
- Geek's Notes:
- Description Add your codes or notes Search More Java Examples
[42]Parse the hosts file and retrive the IP address using pattern match
By grmnn { at } web { dot } de on 2003/08/31 21:13:14 Rate
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.Vector;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class hostTable extends Vector
{
public hostTable ( ) throws IOException
{
BufferedReader bufInput = null;
FileReader input = new FileReader ( "C:\\WINNT\\system32\\drivers\\etc\\hosts" ) ;
bufInput = new BufferedReader ( input ) ;
Pattern p = Pattern.compile ( "^\\s?\\d+\\.\\d+\\.\\d+\\.\\d+\\s+ ( [ A-Z ] [ ^\\s ] + ) \\s.*$" ) ;
try
{
String line = bufInput.readLine ( ) ;
while ( line != null )
{
Matcher m = p.matcher ( line ) ;
if ( m.find ( ) == true ) //line matches the above pattern ?
{
String sys=m.group ( 1 ) ; // [ A-Z ] [ ^\\s ] +
this.add ( sys ) ;
}
line = bufInput.readLine ( ) ;
}
bufInput.close ( ) ;
}
catch ( Exception e ) { e.printStackTrace ( ) ; }
}
}
[920]Check pattern
By kalyan on 2004/09/23 05:22:45 Rate
public static boolean chkpattern ( String _storetokens )
{
Pattern p = Pattern.compile ( "//" ) ;
Matcher m = p.matcher ( _storetokens ) ;
if ( m.matches ( ) == true )
{
return false;
}
else
{
return true;
}
public Pattern pattern()
- Geek's Notes:
- Description Add your codes or notes Search More Java Examples
public static String quoteReplacement(String s)
- See Also:
Matcher
- Geek's Notes:
- Description Add your codes or notes Search More Java Examples
public Matcher region(int start,
int end)- See Also:
- IndexOutOfBoundsException,
useAnchoringBounds, useTransparentBounds
- Geek's Notes:
- Description Add your codes or notes Search More Java Examples
public int regionEnd()
- See Also:
regionStart
- Geek's Notes:
- Description Add your codes or notes Search More Java Examples
public int regionStart()
- See Also:
regionEnd
- Geek's Notes:
- Description Add your codes or notes Search More Java Examples
public String replaceAll(String replacement)
- See Also:
appendReplacement
- Geek's Notes:
- Description Add your codes or notes Search More Java Examples
[533]Replace letter tag
By Anonymous on 2004/07/05 06:28:20 Rate
public String getreplaceLetterTags ( String string )
{
java.util.Date utilDate = ( java.util.Date ) this.getSearchBean ( ) .getDateTo ( ) ;
str = replaceLetterTag ( String string ) ;
if ( this.getDCN ( ) .getLetterBody ( ) != null )
{
return
str = str.replaceAll ( " < dcn:CurrentDate/ > ", "DCNBean.getSubmitterCompany ( ) .getDate ( ) " )
str = str.replaceAll ( " < dcn:CompanyName/ > ", "DCNBean.getSubmitterCompany ( ) .getName ( ) " )
str = str.replaceAll ( " < dcn:CompanyAddress1/ > ", "DCNBean.getSubmitterCompany ( ) .getAddress1 ( ) " )
str = str.replaceAll ( " < dcn:CompanyAddress2/ > ", "DCNBean.getSubmitterCompany ( ) .getAddress2 ( ) " )
str = str.replaceAll ( " < dcn:CompanyCity/ > ", "DCNBean.getSubmitterCompany ( ) .getCity ( ) " )
str = str.replaceAll ( " < dcn:CompanyState/ > ", "DCNBean.getSubmitterCompany ( ) .getState ( ) " )
str = str.replaceAll ( " < dcn:CompanyZip/ > ", "DCNBean.getSubmitterCompany ( ) .getZip ( ) " )
str = str.replaceAll ( " < dcn:AuthorName/ > ", "DCNBean.getSubmitterPOC.getFullName ( ) " )
str = str.replaceAll ( " < dcn:CoverLetterDate/ > ", "DCNBean.getCoverLetterDate ( ) " )
str = str.replaceAll ( " < dcn:DCNNumber/ > ", "DCNbean.getDCNNumber ( ) " ) ;
}
else
{
return "";
}
} [1925]Replace text that matches any regular expression.
By Anonymous on 2007/08/15 11:28:10 Rate
The API for this method states that "given the regular expression a*b, the input aabfooaabfooabfoob, and the replacement string -, an invocation of this method on a matcher for that expression would yield the string -foo-foo-foo-."
import java.util.regex.Pattern;
import java.util.regex.Matcher;
public class ReplaceDemo2 {
private static String REGEX = "a*b";
private static String INPUT = "aabfooaabfooabfoob";
private static String REPLACE = "-";
public static void main ( String [ ] args ) {
Pattern p = Pattern.compile ( REGEX ) ;
Matcher m = p.matcher ( INPUT ) ; // get a matcher object
INPUT = m.replaceAll ( REPLACE ) ;
System.out.println ( INPUT ) ;
}
}
OUTPUT: -foo-foo-foo-[1926]Alternative to replaceAll
By Anonymous on 2007/08/15 11:29:10 Rate
The Matcher class also provides appendReplacement and appendTail methods for text replacement. The following example uses these two methods to achieve the same effect as replaceAll.
import java.util.regex.Pattern;
import java.util.regex.Matcher;
public class RegexDemo {
private static String REGEX = "a*b";
private static String INPUT = "aabfooaabfooabfoob";
private static String REPLACE = "-";
public static void main ( String [ ] args ) {
Pattern p = Pattern.compile ( REGEX ) ;
Matcher m = p.matcher ( INPUT ) ; // get a matcher object
StringBuffer sb = new StringBuffer ( ) ;
while ( m.find ( ) ) {
m.appendReplacement ( sb,REPLACE ) ;
}
m.appendTail ( sb ) ;
System.out.println ( sb.toString ( ) ) ;
}
}
OUTPUT: -foo-foo-foo-
public String replaceFirst(String replacement)
- See Also:
- NullPointerException,
appendReplacement
- Geek's Notes:
- Description Add your codes or notes Search More Java Examples
public boolean requireEnd()
- Geek's Notes:
- Description Add your codes or notes Search More Java Examples
public Matcher reset()
- Geek's Notes:
- Description Add your codes or notes Search More Java Examples
public Matcher reset(CharSequence input)
- Geek's Notes:
- Description Add your codes or notes Search More Java Examples
public int start()
- See Also:
- IllegalStateException, MatchResult
- Geek's Notes:
- Description Add your codes or notes Search More Java Examples
[1923]Counts the number of times a word appears using RegEx
By Anonymous on 2007/08/15 11:22:52 Rate
//Counts the number of times the word "dog" appears in the input string.
import java.util.regex.Pattern;
import java.util.regex.Matcher;
public class MatcherDemo {
private static final String REGEX = "\\bdog\\b";
private static final String INPUT = "dog dog dog doggie dogg";
public static void main ( String [ ] args ) {
Pattern p = Pattern.compile ( REGEX ) ;
Matcher m = p.matcher ( INPUT ) ; // get a matcher object
int count = 0;
while ( m.find ( ) ) {
count++;
System.out.println ( "Match number "+count ) ;
System.out.println ( "start ( ) : "+m.start ( ) ) ;
System.out.println ( "end ( ) : "+m.end ( ) ) ;
}
}
}
OUTPUT:
Match number 1
start ( ) : 0
end ( ) : 3
Match number 2
start ( ) : 4
end ( ) : 7
Match number 3
start ( ) : 8
end ( ) : 11
You can see that this example uses word boundaries to ensure that the letters "d" "o" "g" are not merely a substring in a longer word. It also gives some useful information about where in the input string the match has occurred. The start method returns the start index of the subsequence captured by the given group during the previous match operation, and end returns the index of the last character matched, plus one.
public int start(int group)
- See Also:
- IndexOutOfBoundsException, IllegalStateException, MatchResult
- Geek's Notes:
- Description Add your codes or notes Search More Java Examples
public MatchResult toMatchResult()
- Geek's Notes:
- Description Add your codes or notes Search More Java Examples
public String toString()
- See Also:
- Object
- Geek's Notes:
- Description Add your codes or notes Search More Java Examples
public Matcher useAnchoringBounds(boolean b)
- See Also:
hasAnchoringBounds()
- Geek's Notes:
- Description Add your codes or notes Search More Java Examples
public Matcher usePattern(Pattern newPattern)
- See Also:
- IllegalArgumentException
- Geek's Notes:
- Description Add your codes or notes Search More Java Examples
public Matcher useTransparentBounds(boolean b)
- See Also:
hasTransparentBounds()
- Geek's Notes:
- Description Add your codes or notes Search More Java Examples
Java API By Example, From Geeks To Geeks.