Java List First Item mergePreserveOrder(List first, List second)

Description

merge Preserve Order

License

Apache License

Declaration

public static List<String> mergePreserveOrder(List<String> first,
            List<String> second) 

Method Source Code

//package com.java2s;
/*/* www  .  j a v a 2s  .c  om*/
 * Copyright 2016 FabricMC
 *
 * 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 List<String> mergePreserveOrder(List<String> first,
            List<String> second) {
        List<String> out = new ArrayList<>();

        int i = 0;
        int j = 0;
        while (i < first.size() || j < second.size()) {
            while (i < first.size() && j < second.size()
                    && first.get(i).equals(second.get(j))) {
                out.add(first.get(i));
                i++;
                j++;
            }

            while (i < first.size() && !second.contains(first.get(i))) {
                out.add(first.get(i));
                i++;
            }

            while (j < second.size() && !first.contains(second.get(j))) {
                out.add(second.get(j));
                j++;
            }
        }
        return out;
    }
}

Related

1. limit(List list, Long firstResult, Long maxResults)
2. listWith(Object aFirstObject)
3. merge(List first, List second)
4. mergeLists(List first, List second)
5. mergeLists(List first, List second)
6. moveItemKindInFirst(final List list)
7. nullSafeAppend(List first, List second)
8. orderByFirstOccurenceInText(String listToOrder[], String textToParse, boolean fuzzy)
9. orderByFuzzyFirstOccurenceInText(String listToOrder[], String textToParse)