private static String concat(Collection<String> col)
	{
		StringBuilder b = new StringBuilder();
		boolean first = true;
		for (String s : col)
		{
			if (first)
				first = false;
			else
				b.append(";");

			b.append(s);
		}
		return b.toString();
	}
private static String concat ( Collection < String > col ) { StringBuilder b = new StringBuilder ( ) ; boolean first = true ; for ( String s : col ) { if ( first ) first = false ; else b . append ( ";" ) ; b . append ( s ) ; } return b . toString ( ) ; }
Concatenates the given collection of strings into a single string where values are separated
with a semicolon.
@param col string collection
@return concatenated string