Java Regex - Logical Operator [X|Y] Match



The Logical Operator [X|Y] matches the either X or Y.


The following example shows the usage of logical operator.

package com.tutorialspoint;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class LogicalOperatorDemo {
   private static final String REGEX = "t|o";
   private static final String INPUT = "Welcome to TutorialsPoint.COM";

   public static void main(String[] args) {
      // create a pattern
      Pattern  pattern = Pattern.compile(REGEX);
      // get a matcher object
      Matcher matcher = pattern.matcher(INPUT); 

      while(matcher.find()) {
         //Prints the start index of the match.
         System.out.println("Match String start(): "+matcher.start());

Let us compile and run the above program, this will produce the following result −

Match String start(): 4
Match String start(): 8
Match String start(): 9
Match String start(): 13
Match String start(): 14
Match String start(): 21
Match String start(): 24