Java – String regionMatches() Method example

The method regionMatches() tests if the two Strings are equal. Using this method we can compare the substring of input String with the substring of specified String.

Two variants:
public boolean regionMatches(int toffset, String other, int ooffset, int len): Case sensitive test.
public boolean regionMatches(boolean ignoreCase, int toffset, String other, int ooffset, int len): It has option to consider or ignore the case.

Parameters description:
ignoreCase– if true, ignore case when comparing characters.
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.

Example: regionMatches() method

public class RegionMatchesExample{
   public static void main(String args[]){
       String str1 = new String("Hello, How are you");
       String str2 = new String("How");
       String str3 = new String("HOW");

       System.out.print("Result of Test1: " );
       System.out.println(str1.regionMatches(7, str2, 0, 3));

       System.out.print("Result of Test2: " );
       System.out.println(str1.regionMatches(7, str3, 0, 3));

       System.out.print("Result of Test3: " );
       System.out.println(str1.regionMatches(true, 7, str3, 0, 3));
   }
}

Output:

Result of Test1: true
Result of Test2: false
Result of Test3: true

Reference:

http://docs.oracle.com/javase/7/docs/api/java/lang/String.html#regionMatches(int, java.lang.String, int, int)