How to validate a email address from groovy scripting

I did by below code.

import net.sf.json.groovy.*;
import net.sf.json.groovy.JsonSlurper;

def Res = context.expand( '${Users - Request 1#Response}' )

def slurper = new JsonSlurper()

def json = slurper.parseText Res
def Email = json.email

int i =0;

Email.each()
{
	assert Email[i].contains('@')
	
	log.info Email[i]
	i++
}