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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.

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[] args) throws 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);

  }

}

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