import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		String regex = "\\bString\\h+\\[([0-9]+(?:,\\h+[0-9]+)*)\\]";
		String string = "String [81, 82, 83, 84, 85, 86, 87, 88, 89, 90]";
 
		Pattern pattern = Pattern.compile(regex);
		Matcher matcher = pattern.matcher(string);
 
		if (matcher.find()) {
		    String[] array = matcher.group(1).split(",\\h+");
		    System.out.println(Arrays.toString(array));
		}
	}
}

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