Java Collection Join joinAsString(Collection<? extends Object> collection, String separator)

Description

Join each element in a collection using a string separator

License

Open Source License

Parameter

Parameter	Description
collection	The collection to join
separator	The separator to use

Return

A string where the toString method on each object in the collection has been called and each element is separated with the separator string.

Declaration

public static String joinAsString(Collection<? extends Object> collection, String separator)

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2015 ?ystein Idema Torget and others
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors://from w w  w  .ja v  a  2 s . c om
 *     ?ystein Idema Torget and others
 *******************************************************************************/

import java.util.Collection;

public class Main {
    /**
     * Join each element in a collection using a string separator
     * @param collection The collection to join
     * @param separator The separator to use
     * @return A string where the toString method on each object in the collection has been called and each element is
     * separated with the separator string.
     */
    public static String joinAsString(Collection<? extends Object> collection, String separator) {

        if (collection.isEmpty()) {
            return "";
        }

        StringBuilder result = new StringBuilder();
        boolean first = true;
        for (Object o : collection) {

            if (first) {
                first = false;
            } else {
                result.append(separator);
            }
            result.append(o.toString());

        }
        return result.toString();
    }
}

Java Collection Join joinAsString(Collection collection, String separator)