Java Iterable Join join(final Iterable elements, final String separator)

Description

join

License

Apache License

Declaration

public static String join(final Iterable<? extends CharSequence> elements, final String separator) 

Method Source Code

//package com.java2s;
/*//w  ww .j av a  2s. c  om
 * Copyright 2004-2010 the Seasar Foundation and the Others.
 *
 * 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.Iterator;

public class Main {

    public static String join(final Iterable<? extends CharSequence> elements, final String separator) {
        final StringBuilder buf = new StringBuilder();
        for (final CharSequence element : elements) {
            buf.append(element).append(separator);
        }
        if (buf.length() > 0) {
            buf.setLength(buf.length() - separator.length());
        }
        return new String(buf);
    }

    public static String join(final Iterable<? extends CharSequence> elements1,
            final Iterable<? extends CharSequence> elements2, final String separator1, final String separator2) {
        final StringBuilder buf = new StringBuilder();
        final Iterator<? extends CharSequence> it = elements2.iterator();
        for (final CharSequence element1 : elements1) {
            if (!it.hasNext()) {
                throw new IllegalArgumentException("elements1 > elements2");
            }
            final CharSequence element2 = it.next();
            buf.append(element1).append(separator1).append(element2).append(separator2);
        }
        if (it.hasNext()) {
            throw new IllegalArgumentException("elements1 < elements2");
        }
        if (buf.length() > 0) {
            buf.setLength(buf.length() - separator2.length());
        }
        return new String(buf);
    }
}

Related

1. join(CharSequence delimiter, Iterable tokens)
2. join(CharSequence delimiter, Iterable tokens)
3. join(CharSequence delimiter, Iterable elements)
4. join(CharSequence separator, Iterable strings)
5. join(final CharSequence sep, final Iterable src)
6. join(final Iterable iterable, final CharSequence separator)
7. join(final Iterable objects, final CharSequence separator)
8. join(final Iterable tokens, final String delimiter)
9. join(final Iterable iterable, final String separator)