https://www.codewars.com/kata/54746b7ab2bc2868a0000acf/train/java
//-- https://www.codewars.com/kata/54746b7ab2bc2868a0000acf/train/java
import java.util.regex.Pattern;
public class Mod{
public static Pattern mod4 = Pattern.compile(".*\\[[+-]?0*(\\d*([13579]{1}[26]{1}|[02468]{1}[048]{1})|0|4|8)\\].*");
}
To advance:
http://www.cnblogs.com/China3S/archive/2013/11/30/3451971.html
http://www.cnblogs.com/bvbook/archive/2010/11/03/1867775.html