Java 字符串范围匹配regionMatches方法

public class StringRegionMatch {
   public static void main(String[] args) {
      String first_str = "Welcome to Microsoft";
      String second_str = "I work with Microsoft";
      boolean match = first_str.regionMatches(11, second_str, 12, 9);
      System.out.println("first_str[11 -19] == " + "second_str[12 - 21]:-"+ match);
   }
}