Java Collection Join join(Collection list, char separator)

Description

join

License

Apache License

Declaration

public static String join(Collection list, char separator) 

Method Source Code

//package com.java2s;
/**/* w ww .jav  a  2s .co  m*/
 * Copyright 2013-present febit.org (support@febit.org)
 *
 * 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 String join(Iterator list, char separator) {
        if (list == null) {
            return "";
        }
        final StringBuilder sb = new StringBuilder();
        boolean notfirst = false;
        while (list.hasNext()) {
            Object item = list.next();
            if (notfirst) {
                sb.append(separator);
            } else {
                notfirst = true;
            }
            sb.append(item);
        }
        return sb.toString();
    }

    public static String join(Iterator list, String separator) {
        if (list == null) {
            return "";
        }
        final StringBuilder sb = new StringBuilder();
        boolean notfirst = false;
        while (list.hasNext()) {
            Object item = list.next();
            if (notfirst) {
                sb.append(separator);
            } else {
                notfirst = true;
            }
            sb.append(item);
        }
        return sb.toString();
    }

    public static String join(Collection list, char separator) {
        if (list == null) {
            return "";
        }
        int size = list.size();
        if (size == 0) {
            return "";
        }
        final StringBuilder sb = new StringBuilder();
        boolean notfirst = false;
        for (Object item : list) {
            if (notfirst) {
                sb.append(separator);
            } else {
                notfirst = true;
            }
            sb.append(item);
        }
        return sb.toString();
    }

    public static String join(Collection list, String separator) {
        if (list == null) {
            return "";
        }
        int size = list.size();
        if (size == 0) {
            return "";
        }
        final StringBuilder sb = new StringBuilder();
        boolean notfirst = false;
        for (Object item : list) {
            if (notfirst) {
                sb.append(separator);
            } else {
                notfirst = true;
            }
            sb.append(item);
        }
        return sb.toString();
    }
}

Related

1. join(Collection collection, String separator)
2. join(Collection collection, String separator, boolean trailing)
3. join(Collection data)
4. join(Collection elements, String separator)
5. join(Collection items)
6. join(Collection lst, String delim)
7. join(Collection objects, String glue)
8. join(Collection paramCollection, String paramString)
9. join(Collection parts, String sep)