java - Regex to find exactly 11 repeating numbers -

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my regex: 

^(\d)\1{2}.\1{3}.\1{3}-\1{2}$

repetitions aren't allowed:

000.000.000-00 111.111.111-11 222.222.222-22 333.333.333-33 444.444.444-44 555.555.555-55 666.666.666-66 888.888.888-88 999.999.999-99

it's working fine according https://www.regex101.com/

so i'm trying put in java, tried way: ^(\\d)\\1{2}.\\1{3}.\\1{3}-\\1{2}$, don't want work.

my code:

if (hasthesamedigits(cpfreplaced)) {     msg = "all digits of informed cpf equal."; }  public boolean hasthesamedigits(string cpf) {      return cpf.matches("^(\\d)\\1{2}\\1{3}\\1{3}\\1{2}$"); }

it great if me.

this regex should work: ([0-9])\1\1\.\1\1\1\.\1\1\1-\1\1\1.

(note: bloats java string because of escapes: "([0-9])\\1\\1\\.\\1\\1\\1\\.\\1\\1\\1-\\1\\1\\1".)

explanation:

([0-9]) finds digit.

\1 finds same digit. , again. , again. , again.

\. matches .

- matches -


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