Java Collection Join joinTo(Collection data, String sep, StringBuilder sb)

Description

join To

License

Apache License

Declaration

public static void joinTo(Collection<?> data, String sep, StringBuilder sb) 

Method Source Code

//package com.java2s;
/*//w w  w .  j  a v a 2 s .  c o  m
 * JEF - Copyright 2009-2010 Jiyi (mr.jiyi@gmail.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;

import java.util.Iterator;

public class Main {

    public static void joinTo(Collection<?> data, String sep, StringBuilder sb) {
        if (data == null || data.isEmpty())
            return;
        Iterator<?> iterator = data.iterator();
        sb.append(String.valueOf(iterator.next()));
        while (iterator.hasNext()) {
            Object obj = iterator.next();
            sb.append(sep).append(String.valueOf(obj));
        }
    }

    public static void joinTo(Object[] data, char sep, StringBuilder sb) {
        if (data == null || data.length == 0)
            return;
        sb.append(String.valueOf(data[0]));
        for (int i = 1; i < data.length; i++) {
            sb.append(sep).append(String.valueOf(data[i]));
        }
    }

    public static boolean isEmpty(Object value) {
        if (value == null)
            return true;
        if (value instanceof CharSequence) {
            return ((CharSequence) value).length() == 0;
        }
        return false;
    }
}

Related

1. joinStrings(Collection strings)
2. joinStrings(Collection names)
3. joinStrings(Collection strings)
4. joinStrings(String delim, Collection strs)
5. joinStringValues(Collection