Here you can find the source of dumpToString(Collection c, String separator)
public static String dumpToString(Collection c, String separator)
//package com.java2s; /* Copyright (C) 2003 Univ. of Massachusetts Amherst, Computer Science Dept. This file is part of "MALLET" (MAchine Learning for LanguagE Toolkit). http://www.cs.umass.edu/~mccallum/mallet This software is provided under the terms of the Common Public License, version 1.0, as published by http://www.opensource.org. For further information, see the file `LICENSE' included with this distribution. */ import java.util.*; public class Main { public static String dumpToString(Collection c, String separator) { String retval = ""; for (Iterator it = c.iterator(); it.hasNext();) { retval += String.valueOf(it.next()); retval += separator;/*w w w . j av a 2s. com*/ } return retval; } public static String dumpToString(Collection c) { return dumpToString(c, " "); } }