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There is a newer version: 7.0.0

package aQute.lib.strings;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

import aQute.lib.collections.ExtList;

public class Strings {

	public static String join(String middle, Iterable< ? > objects) {
		return join(middle, objects, null, null);
	}

	public static String join(Iterable< ? > objects) {
		return join(",", objects, null, null);
	}

	public static String join(String middle, Iterable< ? > objects, Pattern pattern, String replace) {
		StringBuilder sb = new StringBuilder();
		join(sb, middle, objects, pattern, replace);
		return sb.toString();
	}

	public static void join(StringBuilder sb, String middle, Iterable< ? > objects, Pattern pattern, String replace) {
		String del = "";
		if (objects == null)
			return;

		for (Object o : objects) {
			if (o != null) {
				sb.append(del);
				String s = o.toString();
				if (pattern != null) {
					Matcher matcher = pattern.matcher(s);
					if (!matcher.matches())
						continue;

					s = matcher.replaceAll(replace);
				}
				sb.append(s);
				del = middle;
			}
		}
	}

	public static String join(String middle, Object[] segments) {
		return join(middle, new ExtList