regex for canadian postal code

im trying to validate a canadian postal code using regex but i dont know that correct syntax..

can someone please help me ..thanks in advance

here is my code .. (postal code is letter number letter space number letter numberex R5Y 1E3)

String regex;

Pattern pattern;

Matcher matcher;

regex = "[A-Z][0-9][A-Z] [0-9][A-Z][0-9]";

pattern = Pattern.compile(regex);

if(! pattern.matcher(param).matches())

[457 byte] By [Picard] at [2007-9-30 21:57:29]