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Editorial Team
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Asked: 2026-06-15T23:50:01+00:00

I need to verify a password string by using Java. This is the requirement

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I need to verify a password string by using Java. This is the requirement of validation:

  • at least 1 number
  • at least 1 alphabet character
  • at least 1 character from set !@#$%^&*()_+=-~`][{};’:”/.>?,<
  • 8 to 20 characters

After screwing around and banging my head to the wall several times, I came up with this regular expression

if (!password.matches("^(?=.+[0-9])(?=.+[a-zA-Z])(?=.+[\\x21-\\x2F\\x3A-\\x40\\x5B-\\x60\\x7B-\\x7E])[0-9a-zA-Z\\x21-\\x2F\\x3A-\\x40\\x5B-\\x60\\x7B-\\x7E]{8,20}$")) {

}

which looks too awful and insane. Is there any better way to achieve this mission ?

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1 Answer

  1. Editorial Team

    i believe this has already been answered.

    Regular Expression for password validation

    but may i suggest that you split up the validation into the respective categories? this way it may be easier and you will be able to tell the user exactly what they’re missing.

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