Base64 encoding Allowed Characters

Question

I'm using Base64 encoding for encoding user id field in Java.

String abc = new String(Base64.encodeBase64("Actualuseridfield")); 

I want to know whether the string abc above will contain the character " , : or not?

When the Base64 encoded string is returned in abc, will it ever contain below characters?

" <double quote>  , <comma>  : <colon> 

Answer 1

You will not see any commas, colons, or double quotes in a Base64 encoded string. You will see equals signs since they're used to pad the ending content.