Java List Last Item addDelimiter(List lines, String delimiter, boolean isDelimitedLastLine)

Description

add Delimiter

License

Apache License

Parameter

Parameter	Description
lines	a parameter
delimiter	a parameter
isDelimitedLastLine	a parameter

Return

Given lines ending with given delimiter, optionally also the last line

Declaration

public static List<String> addDelimiter(List<String> lines, String delimiter, boolean isDelimitedLastLine) 

Method Source Code

//package com.java2s;
/*//from ww w. j a  v  a  2  s  . c  o m
 * Copyright 2011-2015 Kay Stenschke
 *
 * 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.List;

public class Main {
    /**
     * @param   lines
     * @param   delimiter
     * @param   isDelimitedLastLine
     * @return  Given lines ending with given delimiter, optionally also the last line
     */
    public static List<String> addDelimiter(List<String> lines, String delimiter, boolean isDelimitedLastLine) {
        int amountLines = lines.size();
        int index = 0;

        for (String line : lines) {
            line = line.trim();

            boolean isLastLine = index + 1 == amountLines;

            if (!isLastLine || isDelimitedLastLine) {
                // Add delimiter to all lines
                if (!line.endsWith(delimiter)) {
                    line = line + delimiter;
                }
            }

            if (isLastLine && !isDelimitedLastLine && line.endsWith(delimiter)) {
                // Optional: remove delimiter from last line
                line = line.substring(0, line.length() - 1);
            }

            lines.set(index, line + "\n");
            index++;
        }

        return lines;
    }
}

Related

1. addLast(T e, List list)
2. addLastElement(List list, T element)
3. buildPathFromComponentsUpToIndex(final List pathComponents, final int lastIndex)
4. flattenByteSegments(List byteSegments, int eachSegmentButLastLength, int lastSegmentLength)