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/**

* Copyright (c) 2018 Araf Karsh Hamid

* Permission is hereby granted, free of charge, to any person obtaining a copy

* of this software and associated documentation files (the "Software"), to deal

* in the Software without restriction, including without limitation the rights

* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

* copies of the Software, and to permit persons to whom the Software is

* furnished to do so, subject to the following conditions:

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

* THE SOFTWARE.

* This program and the accompanying materials are dual-licensed under

* either the terms of the Eclipse Public License v1.0 as published by

* the Eclipse Foundation

* or (per the licensee's choosing)

* under the terms of the Apache 2 License version 2.0

* as published by the Apache Software Foundation.

*/

package java09;

import java.util.Arrays;

import java.util.Collections;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

/**

* @author: Araf Karsh Hamid

* @version:

* @date:

*/

public class FactoryCollections {

public static void main (String[] args) {

// Characteristcs of Factory-made Collections

// - Unmodifiable

// - Nulls Disallowed

// - Duplicates Disallowed (Sets and Maps)

// - Randomized Iteration Order (Sets and Maps)

exampleList();

}

public static void exampleList() {

// Java 8

List<Integer> intArry1 = Collections.unmodifiableList(Arrays.asList(1,2,3,4));

System.out.println("IntArray 1 = "+intArry1);

// Java 9

List<Integer> intArry2 = List.of(1,2,3,4);

System.out.println("IntArray 2 = "+intArry2);

// Java 8

Map<String, Integer> map1 = new HashMap<>();

map1.put("a", 10);

map1.put("b", 20);

map1.put("c", 30);

map1 = Collections.unmodifiableMap(map1);

System.out.println("Map 1 = "+map1);

// Java 9

Map<String, Integer> map2 = Map.of("a", 10, "b", 20, "c", 30);

System.out.println("Map 2 = "+map2);

}

}