Interchanging String using RegularExpression

This Example describe the way to split a String and interchange the index of string using Regularexpression.

Interchanging String using RegularExpression

Interchanging String using RegularExpression

     

This Example describe the way to split a String and interchange the index of string using Regularexpression. The steps involved in interchanging a String are described below:

String parg = "For some college -Presidents want law- revisited saying age limit- has not curbed-that problems on campuses":- Defines a string that is to be splitted after (-) expression.

String[] token = null:-Declares an array named token in which the splitted string is to be stored.

String splitPoint = "-":-Declares the point from where the string is to be splitted.

sentence.split(splitPoint):-This method splits the string from the point where it finds (-)expression.

retival = token[1] + " " + token[0] +""+ token[4] +""+ token[3]:-This method is generally for the displaying tokens in the order which you want.

SplittingString_Interchanging.java

import java.util.regex.*;
public class SplittingString_Interchanging {
 public static void main(String args[]) {
  String parg = "For some college -Presidents want law- revisited"+
  " saying age limit- has not curbed-that problems on campuses";
  interchange(parg);
  }
  public static String interchange(String sentence) {
 String retival = null;
  String[] token = null;
  String splitPoint = "-";
  token = sentence.split(splitPoint);
  if (token == null) {
  String msg = " Not Matching: pattern:" + sentence
  + "\r\n regex: " + splitPoint;
  } else {
  retival = token[1] + " " + token[0] +""+ token[4] +""+ token[3];
  System.out.println("BEFORE SPLITTING: " + sentence);
  System.out.println("AFTER SPLITTING: " + retival + "\n");
  }
  return retival;
  }
}

Output of the program
BEFORE SPLITTING: For some college -Presidents want law- revisited
saying age limit- has not curbed-that problems on campuses
============================================
AFTER SPLITTING: Presidents want law For some college
that problems on campuses has not curbed

Download Source code

Tutorials

  1. Matching Pattern using Regularexpression
  2. Interchanging String using RegularExpression
  3. Split Demo using RegularExpression
  4. Replacing String using Regularexpression
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  15. Pointing and indicating matcher using regular expression
  16. Finding word using regular expression
  17. Appending and replacing string using regular expression
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  20. Replacing all the text of String using expression
  21. Pattern resetting using regular expression
  22. Match string using regular expression without Case sensitivity
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  25. Regular Expressions