groovy 关键字

关键字是不能用于定义变量时使用:所以我们最好记住一些关键词：

as

assert

break

case

catch

class

const

continue

def

default

do

else

enum

extends

false

finally

for

goto

if

implements

import

in

instanceof

interface

new

null

package

return

super

switch

this

throw

throws

trait

true

try

while