Java String Segmentation

1. Java.lang.String's Split () method, JDK 1.4 or later

Split

Public string[] Split (String regex,

int limit)

Splits this string according to the given regular expression.

The array returned by this method contains each substring of this string, terminated by another substring that matches the given expression, or terminated by the end of the string. The substrings in the array are arranged in the order in which they are in this string. If the expression does not match any part of the input, the resulting array has only one element, that is, the string.

The limit parameter controls the number of times the mode is applied, thus affecting the length of the resulting array. If the limit n is greater than 0, the pattern will be applied up to n-1 times, the length of the array will not be greater than N, and the last item of the array will contain all inputs that exceed the last matching delimiter. If n is not positive, the pattern is applied as many times as possible, and the array can be any length. If n is zero, the pattern is applied as many times as possible, the array can have any length, and the end empty string is discarded.

For example, the string "Boo:and:foo" uses these parameters to produce the following results:

Regex

Limit

Results

:

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"}