This Example describe the way to split a String and interchange the index of 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

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