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+//https://www.hackerrank.com/challenges/matching-range-of-characters%0Apublic class Solution %7B    %0A  public static void main(String%5B%5D args) %7B%0A    Regex_Test tester = new Regex_Test();%0A    tester.checker(%22%5E%5Ba-z%5D%5B1-9%5D%5B%5Ea-z%5D%5B%5EA-Z%5D%5BA-Z%5D%22);%0A  %7D%0A%7D%0A

Create matching-range-of-characters.java