Groovy的正則表達式：在switch語句

Question

捕獲組考慮下面的Groovy代碼switch語句：

def vehicleSelection = "Car Selected: Toyota" 

switch (vehicleSelection) { 
    case ~/Car Selected: (.*)/: 

     println "The car model selected is " + ??[0][1] 
} 

是否可以提取字「豐田」 沒有定義一個新的（def）變量？

Answer 1

這是可能的使用方法lastMatcher通過Groovy中加入Matcher：

import java.util.regex.Matcher 

def vehicleSelection = 'Car Selected: Toyota' 

switch(vehicleSelection) { 
    case ~/Car Selected: (.*)/: 
    println "The car model selected is ${Matcher.lastMatcher[0][1]}" 
} 

Answer 2

大廈tim_yates回答是真正幫助我：

如果你想避免一堆Matcher.lastMatcher的」 「在你的代碼中，你可以創建一個輔助函數來充當別名。

import java.util.regex.Matcher 

static Matcher getm() 
{ 
    Matcher.lastMatcher 
} 

def vehicleSelection = 'Car Selected: Toyota' 

switch(vehicleSelection) { 
    case ~/Car Selected: (.*)/: 
     println "The car model selected is ${m[0][1]}" 
    break; 
}