Mega Code Archive
Join a collection of strings by a seperator
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/*
* Copyright (C) 2009 Teleca Poland Sp. z o.o. <android@teleca.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import java.util.Collection;
import java.util.Iterator;
class Main{
/**
* Join a collection of strings by a seperator
* @param strings collection of string objects
* @param sep string to place between strings
* @return joined string
*/
public static String join(Collection strings, String sep) {
return join(strings.iterator(), sep);
}
/**
* Join a collection of strings by a seperator
* @param strings iterator of string objects
* @param sep string to place between strings
* @return joined string
*/
public static String join(Iterator strings, String sep) {
if (!strings.hasNext())
return "";
String start = strings.next().toString();
if (!strings.hasNext()) // only one, avoid builder
return start;
StringBuilder sb = new StringBuilder(64).append(start);
while (strings.hasNext()) {
sb.append(sep);
sb.append(strings.next());
}
return sb.toString();
}
}
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