Java Array Join join(String[] array)

Description

join string.

License

Apache License

Parameter

Parameter	Description
array	String array.

Return

String.

Declaration

public static String join(String[] array) 

Method Source Code

//package com.java2s;
/*//from  ww w  .  ja  v  a2s  .  c  o m
 * Copyright 1999-2011 Alibaba Group.
 *  
 * 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 {
    /**
     * join string.
     * 
     * @param array String array.
     * @return String.
     */
    public static String join(String[] array) {
        if (array.length == 0)
            return "";
        StringBuilder sb = new StringBuilder();
        for (String s : array)
            sb.append(s);
        return sb.toString();
    }

    /**
     * join string like javascript.
     * 
     * @param array String array.
     * @param split split
     * @return String.
     */
    public static String join(String[] array, char split) {
        if (array.length == 0)
            return "";
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < array.length; i++) {
            if (i > 0)
                sb.append(split);
            sb.append(array[i]);
        }
        return sb.toString();
    }

    /**
     * join string like javascript.
     * 
     * @param array String array.
     * @param split split
     * @return String.
     */
    public static String join(String[] array, String split) {
        if (array.length == 0)
            return "";
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < array.length; i++) {
            if (i > 0)
                sb.append(split);
            sb.append(array[i]);
        }
        return sb.toString();
    }

    public static String join(Collection<String> coll, String split) {
        if (coll.isEmpty())
            return "";

        StringBuilder sb = new StringBuilder();
        boolean isFirst = true;
        for (String s : coll) {
            if (isFirst)
                isFirst = false;
            else
                sb.append(split);
            sb.append(s);
        }
        return sb.toString();
    }

    /**
     * is empty string.
     * 
     * @param str source string.
     * @return is empty.
     */
    public static boolean isEmpty(String str) {
        if (str == null || str.length() == 0)
            return true;
        return false;
    }
}

Related

1. join(String[] a, String[] b)
2. join(String[] a1, String[] a2)
3. join(String[] ar, String sep)
4. join(String[] args)
5. join(String[] args, String delimiter)
6. join(String[] array)
7. join(String[] array)
8. join(String[] array)
9. join(String[] array)