Java – String regionMatches() Method

Description:

This method has two variants which can be used to test if two string regions are equal.

Syntax:

Here is the syntax of this method:

public boolean regionMatches(int toffset,
                             String other,
                             int ooffset,
                             int len)

or

public boolean regionMatches(boolean ignoreCase,
                             int toffset,
                             String other,
                             int ooffset,
                             int len)

Parameters:

Here is the detail of parameters:

  • toffset — the starting offset of the subregion in this string.
  • other — the string argument.
  • ooffset — the starting offset of the subregion in the string argument.
  • len — the number of characters to compare.
  • ignoreCase — if true, ignore case when comparing characters.

Return Value :

  • It returns true if the specified subregion of this string matches the specified subregion of the string argument; false otherwise. Whether the matching is exact or case insensitive depends on the ignoreCase argument.

Example:

import java.io.*;

public class Test{
   public static void main(String args[]){
      String Str1 = new String("Welcome to www.dineshonjava.com");
      String Str2 = new String("dineshon");
      String Str3 = new String("DINESHON");

      System.out.print("Return Value :" );
      System.out.println(Str1.regionMatches(11, Str2, 0, 9));

      System.out.print("Return Value :" );
      System.out.println(Str1.regionMatches(11, Str3, 0, 9));

      System.out.print("Return Value :" );
      System.out.println(Str1.regionMatches(true, 11, Str3, 0, 9));
   }
}

This produces following result:

output:
Return Value :false
Return Value :false
Return Value :false
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Dinesh Rajput

Dinesh Rajput is the chief editor of a website Dineshonjava, a technical blog dedicated to the Spring and Java technologies. It has a series of articles related to Java technologies. Dinesh has been a Spring enthusiast since 2008 and is a Pivotal Certified Spring Professional, an author of a book Spring 5 Design Pattern, and a blogger. He has more than 10 years of experience with different aspects of Spring and Java design and development. His core expertise lies in the latest version of Spring Framework, Spring Boot, Spring Security, creating REST APIs, Microservice Architecture, Reactive Pattern, Spring AOP, Design Patterns, Struts, Hibernate, Web Services, Spring Batch, Cassandra, MongoDB, and Web Application Design and Architecture. He is currently working as a technology manager at a leading product and web development company. He worked as a developer and tech lead at the Bennett, Coleman & Co. Ltd and was the first developer in his previous company, Paytm. Dinesh is passionate about the latest Java technologies and loves to write technical blogs related to it. He is a very active member of the Java and Spring community on different forums. When it comes to the Spring Framework and Java, Dinesh tops the list!

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