Groovy: Generate random string from given character set

Question

Using Groovy, I\'d like to generate a random sequence of characters from a given regular expression.

• Allowed charaters are: [A-Z0-9]
• Length o

Answer 1

This code is pure Groovy I found on the web:

def key
def giveMeKey(){
    String alphabet = (('A'..'N')+('P'..'Z')+('a'..'k')+('m'..'z')+('2'..'9')).join() 
    def length = 6
     key = new Random().with {
           (1..length).collect { alphabet[ nextInt( alphabet.length() ) ] }.join()
             }
            return key
        }

The return string is good enough for local use:

BFx9PU
MkbRaE
FKvupt
gEwjby
Gk2kK6
uJmzLB
WRJGKL
RnSUQT