regex - How to convert this regular expression into a format java can use? -

i want use regular expressions able parse sequence this...

ifelseifelseififif

where every else needs if not every if needs else. plan on using expression

((if)*+(ifelse)*)*

but don't know how convert format can use in java. show me , break down me?

in regex logic want match:

(if if
| or
ifelse) ifelse
* token, 0 or more times.

(if|ifelse)*

this match 0 or more if/elseifs.

if need fill entire string start end, e.g. no partial matches, put ^ before , $ after it:

^(if|ifelse)*$

please read http://www.regular-expressions.info/reference.html introduction regex syntax (for instance, + not think in regexes), , use http://www.regexpal.com test regexes in browser.

Brande