Java Collection to String toString(Collection collection)

Description

to String

License

Apache License

Declaration

public static String toString(Collection<?> collection) 

Method Source Code

//package com.java2s;
/*//w w  w . j  a  v  a 2 s . c o  m
 * Copyright 2012 gitblit.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;

public class Main {
    public static String toString(Collection<?> collection) {
        if (isEmpty(collection)) {
            return "";
        }
        StringBuilder sb = new StringBuilder();
        for (Object o : collection) {
            sb.append(o.toString()).append(", ");
        }
        // trim trailing comma-space
        sb.setLength(sb.length() - 2);
        return sb.toString();
    }

    public static boolean isEmpty(byte[] array) {
        return array == null || array.length == 0;
    }

    public static boolean isEmpty(char[] array) {
        return array == null || array.length == 0;
    }

    public static boolean isEmpty(Object[] array) {
        return array == null || array.length == 0;
    }

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

Related

1. toString(Collection collection)
2. toString(Collection collection, String prefix, String suffix)
3. toString(Collection c)
4. toString(Collection c)
5. toString(Collection collection)
6. toString(Collection collection)
7. toString(Collection collection, String separator)
8. toString(Collection elements, String separator)
9. toString(Collection itemList)