How to generate a random string in Apex

A Apex method to get a random string given a length

Andres Canavesi
Andrés Canavesi
Oct 13, 2021
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private static String generateRandomString(Integer len) {
        final String chars = 'xaxPmno2IDdEwLzbtEvhv6oG1RDT6xQJX3MvF4amaDQ9TUvHgJfdbodlllPTnnuw';
        String randStr = '';
        while (randStr.length() < len) {
            Integer idx = Math.mod(Math.abs(Crypto.getRandomInteger()), chars.length());
            randStr += chars.substring(idx, idx+1);
        }
        return randStr;
    }
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