Find a dot in a string, Java

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//'main' method must be in a class 'Rextester'.
//Compiler version 1.8.0_111

import java.util.*;
import java.lang.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

class Rextester
{  
    final static String regex = "^[\\/\\.].*$";
    final static String[] stringsToTest = { ".file",
                                            "./file",
                                            "/file",
                                            "/.file",
                                            ".",
                                            "./",
                                            "/some/path",
                                            "/some-path/.some-file",
                                            "/path/path/.file",
                                            "/path/.file",
                                            "/asfas/.d",
                                            "/path/.file" };

final static Pattern pattern = Pattern.compile(regex);

public static void main(String[] args) 
    {
        for (String text : stringsToTest) {
            testRegex(text);
        }       
    }

public static void testRegex(String testString) 
    {
        Matcher matcher = pattern.matcher(testString);

while (matcher.find()) 
        {
            System.out.println("Full match: " + matcher.group(0));

for (int i = 1; i <= matcher.groupCount(); i++) 
            {
                System.out.println("Group " + i + ": " + matcher.group(i));
            }
        }
    }
}

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Compilation time: 0.62 sec, absolute running time: 0.14 sec, cpu time: 0.07 sec, memory peak: 18 Mb, absolute service time: 0,77 sec