Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 Copyright (C) 2016 HermeneutiX.org
    
 This file is part of SciToS.
    
 SciToS is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.
    
 SciToS is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
    
 You should have received a copy of the GNU General Public License
 along with SciToS. If not, see <http://www.gnu.org/licenses/>.
 */

import java.util.Collection;

public class Main {
    /**
     * Create a textual representation of the given collection, separating the individual elements by the provided separator.
     * 
     * @param collection
     *            the collection to represent as text
     * @param separator
     *            the separator to include between elements of the collection
     * @return the colleciton's textual representation (or an empty String if the collection is {@code null} or empty)
     */
    public static String toString(final Collection<?> collection, final String separator) {
        if (collection == null || collection.isEmpty()) {
            // just return an empty String if the collection is null or empty
            return "";
        }
        if (separator == null) {
            // fall back to the collection's toString() method if no custom separator has been specified
            return collection.toString();
        }
        // guess at a meaningful initial size
        final StringBuilder builder = new StringBuilder(collection.size() * (16 + separator.length()));
        boolean addSeparator = false;
        // iterate over the individual elements
        for (final Object collectionElement : collection) {
            if (addSeparator) {
                builder.append(separator);
            } else {
                addSeparator = true;
            }
            // null elements are treated as empty Strings
            if (collectionElement != null) {
                builder.append(collectionElement.toString());
            }
        }
        return builder.toString();
    }
}