kooyee ‘s blog

public String[] split(String regex, int limit)

limit n 大于0，则pattern（模式）应用n - 1 次

String s = "boo:and:foo"
s.split(":",2)
//result is { "boo", "and:foo" }

limit n 小于0，则pattern（模式）应用无限次

String s = "boo:and:foo"
s.split(":",-2)
//result is { "boo", "and", "foo" }

limit n 等于0，则pattern（模式）应用无限次并且省略末尾的空字串

String s = "boo:and:foo"
s.split("o", -2)
   //result is { "b", "", "and:f", "", "" }
   s.split("o", 0)
   //result is { "b", "", "and:f" }

The limit parameter controls the number of times the pattern is applied and therefore affects the length of the resulting array. If the limit n is greater than zero then the pattern will be applied at most n - 1 times, the array's length will be no greater than n, and the array's last entry will contain all input beyond the last matched delimiter. If n is non-positive then the pattern will be applied as many times as possible and the array can have any length. If n is zero then the pattern will be applied as many times as possible, the array can have any length, and trailing empty strings will be discarded.

The string "boo:and:foo", for example, yields the following results with these parameters:

Regex	Limit	Result
:	2	{ "boo", "and:foo" }
:	5	{ "boo", "and", "foo" }
:	-2	{ "boo", "and", "foo" }
o	5	{ "b", "", ":and:f", "", "" }
o	-2	{ "b", "", ":and:f", "", "" }
o	0	{ "b", "", ":and:f" }