Java List Merge mergeListNoDuplicate(List one, List two)

Description

merge List No Duplicate

License

Apache License

Declaration

public static <T> List<T> mergeListNoDuplicate(List<T> one, List<T> two) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.util.ArrayList;

import java.util.List;

public class Main {
    public static <T> List<T> mergeListNoDuplicate(List<T> one, List<T> two) {

        if (isAllNull(one, two))
            return null;

        List<T> result = new ArrayList<>();

        if (isAllNotNull(one, two)) {
            result.addAll(one);//from www. j a  va 2 s.co m
            for (T t : two) {
                if (one.indexOf(t) == -1) {
                    result.add(t);
                }
            }
        } else {
            result.addAll(findFirstNotNull(one, two));
        }

        return result;
    }

    public static <T> boolean isAllNull(T one, T two) {
        return one == null ? two == null : false;
    }

    public static <T> boolean isAllNotNull(T one, T two) {
        return one != null && two != null;
    }

    public static <T> int indexOf(int start, List<T> datas, T target) {
        int index = -1;

        for (int i = start; i < datas.size(); i++) {
            if (datas.get(i).equals(target)) {
                index = i;
                break;
            }
        }
        return index;
    }

    public static <T> T findFirstNotNull(T... types) {
        for (T type : types) {
            if (type != null)
                return type;
        }
        return null;
    }
}

Related

1. mergeList(List list1, List list2)
2. mergeList(List