Java Collection to String collectionToString(Collection collection, String prefix)

Description

collection To String

License

Apache License

Declaration

public static <E> String collectionToString(Collection<E> collection, String prefix) 

Method Source Code

//package com.java2s;
/*//from  ww  w. j av a 2s .  co m
 * Copyright 2002-2014 the original author or authors.
 *
 * 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.*;

public class Main {
    public static <E> String collectionToString(Collection<E> collection, String prefix) {
        StringBuilder sb = new StringBuilder();
        collectionToString(sb, collection, prefix, "[", ",", "]");
        return sb.toString();
    }

    public static <E> void collectionToString(StringBuilder sb, Collection<E> collection, String prefix,
            String leader, String sep, String trailer) {
        if (prefix != null)
            sb.append(prefix);
        if (leader != null)
            sb.append(leader);
        boolean haveSep = sep != null && !sep.isEmpty();
        boolean reqSep = false;
        if (collection != null) {
            for (E element : collection) {
                if (reqSep)
                    sb.append(sep);
                sb.append(element.toString());
                reqSep = haveSep;
            }
        }
        if (trailer != null)
            sb.append(trailer);
    }

    public static boolean isEmpty(Collection<?> collection) {
        return (collection == null || collection.isEmpty());
    }
}

Related

1. collectionToString(Collection collection, String separator)
2. collectionToString(Collection collection, String separator)
3. collectionToString(Collection elements)
4. collectionToString(Collection list)
5. collectionToString(Collection list)
6. collectionToString(Collection