Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright 2011 the original author or authors.
 *
 * 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 <T> List<T> toList(Iterable<? extends T> things) {
        if (things instanceof List) {
            @SuppressWarnings("unchecked")
            List<T> castThings = (List<T>) things;
            return castThings;
        }
        return toMutableList(things);
    }

    public static <T> List<T> toList(Enumeration<? extends T> things) {
        AbstractList<T> list = new ArrayList<T>();
        while (things.hasMoreElements()) {
            list.add(things.nextElement());
        }
        return list;
    }

    public static <T> List<T> toList(T[] things) {
        if (things == null || things.length == 0) {
            return new ArrayList<T>(0);
        }

        List<T> list = new ArrayList<T>(things.length);
        Collections.addAll(list, things);
        return list;
    }

    private static <T> List<T> toMutableList(Iterable<? extends T> things) {
        if (things == null) {
            return new ArrayList<T>(0);
        }
        List<T> list = new ArrayList<T>();
        for (T thing : things) {
            list.add(thing);
        }
        return list;
    }

    /**
     * Utility for adding an iterable to a collection.
     *
     * @param t1 The collection to add to
     * @param t2 The iterable to add each item of to the collection
     * @param <T> The element type of t1
     * @return t1
     */
    public static <T> Collection<T> addAll(Collection<T> t1, Iterable<? extends T> t2) {
        for (T t : t2) {
            t1.add(t);
        }
        return t1;
    }

    /**
     * Utility for adding an array to a collection.
     *
     * @param t1 The collection to add to
     * @param t2 The iterable to add each item of to the collection
     * @param <T> The element type of t1
     * @return t1
     */
    public static <T> Collection<T> addAll(Collection<T> t1, T... t2) {
        Collections.addAll(t1, t2);
        return t1;
    }
}