In this section, we will learn what the String regionMatches() method is and how to use it in Java.

What is Java String regionMatches() Method?

The `regionMatches()` method is used to compare a region of the target String with a region of a given string (as the argument to the method) and see if they match.

Java regionMatches() Method Syntax:

The method is overloaded and here are the syntaxes of the methods:

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

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

regionMatches() Method Parameters:

• `toffset`: this value declares the starting index of the first string.
• `other`: this is the second string object that we want to compare part of its value with the first string.
• `ooffset`: this value declares the starting index of the second string.
• `len`: this number declares the number of characters from the starting index in each string object that we want to compare.
• `ignoreCase`: this is a boolean value, and it defines whether the case sensitivity should be on or off.

Note: by default, the value is `true` but we can set the value to `false` which means the method should not be case sensitive.

regionMatches() Method Return Value:

The return value of this method is of type Boolean.

If they matched, the result will be `true` otherwise `false`.

Example: using String regionMatches() method

public class Simple {

    public static void main(String args[]) {
        String str = "Welcome to future";
        System.out.println(str.regionMatches(11,"future",0,6));
    }
}

Output: true