/*
	Java Split excluyendo rango
	https://es.stackoverflow.com/q/138135/127
*/
 
import java.io.*;import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		final String regex = "(\\d+)(?:\\[(\\d+)Y,(\\d+)W,(\\d+)H])?";
		final String texto = "1,2,3,20[4Y,2W,4H] , 10[2Y,1W,5H],4 , 5[10Y,20W,5H]";
 
		// así se compila siempre un regex
		final Pattern pattern = Pattern.compile(regex);
		final Matcher matcher = pattern.matcher(texto);
 
		//y así se buscan siempre todas las coincidencias
		while (matcher.find()) {
		    //asignamos el valor capturado por cada grupo
		    String valor  = matcher.group(1);
		    String rangoY = matcher.group(2);
		    String rangoW = matcher.group(3);
		    String rangoH = matcher.group(4);
 
		    //imprimimos en consola
		    System.out.printf("Valor: %3s - Y: %4s - W: %4s - H: %4s%n",valor,rangoY,rangoW,rangoH);
		}
	}
}

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