1.方法返回多个结果：返回数组，将多个变量逗号隔开，放在左侧圆括号中
def splitName (fullName) {
fullName.split(' ')
}
def (firstName, lastName) = splitName('Tom Smith')
println "$lastName, $firstName"
/* output
Smith Tom
*/
2.交换变量：将欲交换的变量放在左侧圆括号内，右侧中括号相反顺序放置
def name1 = 'aaa'
def name2 = 'bbb' (name1, name2) = [name2, name1] println "$name1, name2" /*output
bbb, name2
*/
3.使用多赋值：如果有多余的变量，则会设置变量为null
def (String cat, String mouse) = ['Tom', 'Jerry', 'Spike'] println "$cat, $mouse" def (first, second, third) = ['Tom', 'Jerry'] println "$first, $second, $third" /*output
Tom, Jerry
Tom, Jerry, null
*/