Java List from listOf(Collection collection, T... elements)

Description

list Of

License

Open Source License

Declaration

public static <T> List<T> listOf(Collection<T> collection, T... elements) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.util.ArrayList;
import java.util.Collection;

import java.util.List;

public class Main {
    public static <T> List<T> listOf(Collection<T> collection, T... elements) {
        return (List<T>) fillCollection(fillCollection(newList(), collection), elements);
    }//w  w w . ja  va  2s. c  o m

    public static <T> List<T> listOf(Collection<T> collectionA, Collection<T> collectionB) {
        return (List<T>) fillCollection(fillCollection(newList(), collectionA), collectionB);
    }

    public static <T> List<T> listOf(T... elements) {
        return (List<T>) fillCollection(newList(), elements);
    }

    private static <T> Collection<T> fillCollection(Collection<T> myCollection, T[] elements) {
        if (elements != null) {
            for (T element : elements) {
                myCollection.add(element);
            }
        }
        return myCollection;
    }

    private static <T> Collection<T> fillCollection(Collection<T> myCollection, Collection<T> elements) {
        if (elements != null) {
            myCollection.addAll(elements);
        }
        return myCollection;
    }

    private static <T> List<T> newList() {
        return new ArrayList<T>();
    }
}

Related

1. listOf(A... values)
2. listOf(A[] objs)
3. listOf(Class type)
4. listOf(Collection coll)
5. listOf(Collection... elts)
6. listOf(double... values)
7. listOf(E... elements)
8. listOf(E... elements)