Using the Captured Text of a Group within a Replacement Pattern

In this section, you will learn how to use the captured text from the group of the text. This section illustrates you how to capture the string or text through the regular expression and it is also used through the regular expression.

Ads

Tutorials   
How to read properties file in Java? Generate random numbers in Java Cloneable Interface in Java What is the flaw with the Stack class? List In Java Java Stack Example HashSet In Java Enumeration in java How to generate random number in java Iterator in java Queue in java Transient Java Keyword clone method in Java Java Queue example Logger in Java Java current date - How to get current date in Java Collection : LinkedList Example Collection : ArrayList Example Random alpha numeric string of fixed size Java List Iterator Example The Hashtable Class The BitSet class Java Vector Java Enumeration Data Structures in Java Java Transient Variable Java Date Format Example Java Properties File Example Map.Entry Java Interface Java Property File java preferences,Change the value of Preferences by user Retrieving a Preference Node Java hasNext Write Keys and Values to the Properties file in Java Get All Keys and Values of the Properties files in Java Properties file in Java Properties file in Java Determining If a Preference Node Contains a Specific Value Change the value of Preferences by user Clone method example in Java Implementing a Simple Event Notifier Determining When a Preference Node Is Added or Removed Listening for Changes to Preference Values in a Preference Node Importing Preferences Finding a Preference in a Preference Tree Retrieving the Parent and Child Nodes of a Preference Node Determining If a Preference Node Exists Removing a Preference Node Creating a Preference Node Getting the Maximum Size of a Preference Key and Value
Ads

Using the Captured Text of a Group within a Replacement Pattern

     

In this section, you will learn how to use the captured text from the group of the text. This section illustrates you how to capture the string or text through the regular expression and it is also used through the regular expression. Here as you seen the regular expression of the code which has been used to capture each and every word one by one i.e. "(\\w+)" and another regular expression is "\"$1\"" i.e. used to replace with the same word covering by the "<>" characters.

"$1": This is the regular expression which determines the same word or characters where it is used for the specific purposes.

Here is the code of the program:

import java.util.regex.*;
import java.io.*;

public class CapturedText{
  public static void main(String[] argsthrows IOException{
  BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
  System.out.print("Enter string: ");
  String string = in.readLine();
  Pattern p = Pattern.compile("(\\w+)");
  Matcher m = p.matcher(string);
  String str = m.replaceAll("\"$1\"");
  System.out.println(str);
  }
}

Download this example.

Advertisements

Share on Google+Share on Google+

Using the Captured Text of a Group within a Replacement Pattern

Posted on: February 22, 2008 If you enjoyed this post then why not add us on Google+? Add us to your Circles

Advertisements

 

Discuss: Using the Captured Text of a Group within a Replacement Pattern  

Post your Comment


Your Name (*) :
Your Email :
Subject (*):
Your Comment (*):
  Reload Image
 
 
Comments:0

Ads

 

Ads