Java String regionMatches example

Table of Contents

Method Syntax:
String regionMatches example :

String’s regionMatches is used to compare substring of one string to substring of another.Here region may be refer to substring of String, so we are comparing regions of one string with another.

Method Syntax:

There are two overloaded version of regionMatches:

// Case sensitive

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

// It has extra option to ignore the case

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

Parameters:

ignoreCase: It is boolean field to indicate whether to ignore case or not.
toffset : It is start index of sub String of String on which this method is being called.
other: It is other String by which this String will compare.
ooffset: It is start index of substring of other argument String
len : Number of characters to compare

Lets understand with the example:

You have two Strings and you want to match String java in both str1 and str2.

// 1st

String str1= "Hello world from java2blog.com";

//2nd

String str2= "Core java programming tutorials";

str1.regionMatches(17, str2, 5, 4) will do it. This expression will return true.

How?

17 is starting index of String java in str1.

str2 is our 2nd String

5 is starting index for String java in str2

4 is number of characters in String java

String regionMatches example :

package org.arpit.java2blog;

public class StringRegionMatchesExample {

public static void main(String[] args) {

// 1st

String str1= "Hello world from java2blog.com";

//2nd

String str2= "Core java programming tutorials";

// 3rd

String str3= "JAVA PROGRAMMING TUTORIALS";

System.out.println("Comparing 1st and 2nd (java in both String): "+ str1.regionMatches(17, str2, 5, 4));

// Ignoring case

System.out.println("Comparing 2nd and 3nd (programming in both string): "+ str2.regionMatches(true,10, str3, 5, 4));

}

When you run above program, you will get below output:

Comparing 1st and 2nd (java in both String): true

Comparing 2nd and 3nd (programming in both string): true

Author

String

13 July

Remove substring from String in Java

Table of ContentsUsing String’s replace method to remove substring from String in JavaUsing String’s replaceFirst method to remove substring from String in JavaUsing String’s replaceAll method to remove substring from String in JavaUsing StringBuilder’s delete() method to remove substring from String in JavaUsing StringBuilder’s replace() method to remove substring from String in JavaConclusion In this […]

String

23 June

Java String contains Ignore Case

Table of ContentsUsing String.toLowerCase()Using Pattern.compile()Using String’s MatchesUsing StringUtils.containsIgnoreCase()Complete program for Java String contains IgnoreCaseConclusion We often have to check if a string contains a substring or not in a case-insensitive manner. There are multiple ways to do so. In this article, we will take a look at these methods for java String contains Ignore Case […]

String

02 June

Find and count occurrences of substring in string in java

Table of ContentsUsing the indexOf() methodUsing regular expressionUsing split() methodUsing the countMatches() method from Apache Commons library In this post, we will see how to find and count occurrences of substring in string in java. Using the indexOf() method The indexOf() method in java is a specialized function to find the index of the first […]

String

23 May

Print double quotes in java

Table of ContentsPrint double quotes in java using backslash characterPrint double quotes in java using unicode characterPrint double quotes in java by appending double quote character 💡 Outline You can print double quotes in java by escape double quotes using backslash character(\). [crayon-614e3f618b418547042548/] When you print on console using System.out.println, you use double quotes and […]