它
"\S"在正则表达式引擎中表示
S非空白字符的每个字符上进行拆分。
因此，让我们尝试分割
"xx"非空白（
S）。由于此正则表达式可以用一个字符进行匹配，因此可以对其进行迭代以标记拆分的位置（我们将使用竖线
|进行表示）。
- 是
'x'
一个非空白？是的，让我们标记一下| x
- 是
' '
一个非空白？不，所以我们保持原样 - 是最后一个
'x'
非空白吗？是的，让我们标记一下| |
因此，作为结果，我们需要在开始和结束时拆分字符串，这最初会给我们结果数组
["", " ", ""] ^ ^ - here we split
但是由于删除了结尾的 空字符串 ，结果将是
[""," "] <- result ,""] <- removed trailing empty string
因此split返回
["", " "]仅包含两个元素的数组。
顺便说一句。要关闭删除最后一个空字符串的操作，您需要使用
split(regex,limit)limit的负值，例如
split("\S",-1)。现在回到您的示例。如果您有数据，则将每个
I am preparing for OCPJP| || ||||||||| ||| |||||
意思是
""|" "|""|" "|""|""|""|""|""|""|""|""|" "|""|""|" "|""|""|""|""|""
所以这代表这个数组
[""," ",""," ","","","","","","","",""," ","",""," ","","","","",""]
但是由于
""删除了结尾的空字符串（如果它们的存在是由split引起的-
有关更多信息，请访问：混淆String.split的输出）
[""," ",""," ","","","","","","","",""," ","",""," ","","","","",""]^^ ^^ ^^ ^^ ^^
您得到的结果数组仅包含以下部分：
[""," ",""," ","","","","","","","",""," ","",""," "]
正好是16个元素
