Utilizing Factory Methods to Create Immutable Collections - Java Collection Framework

Java examples for Collection Framework:Immutable

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Introduction

Utilize the Collection.of() construct to generate an immutable collection. 

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

public class Main {
    public static void main(String[] args){
        List<String> jvmLanguages = List.of("Java", "Scala", "JRuby", "Groovy", "Jython", "Kotlin");
        System.out.println(jvmLanguages);
        try {
            jvmLanguages.add("Exception");
        } catch (UnsupportedOperationException uoe){
            System.out.println(uoe);
        }
        Map <Integer, String> players = Map.of(1, "Ana Bates", 2, "Lady Mary", 3, "William Wang", 4, "Corus Nee");
        System.out.println(players.values());
        System.out.println("Player 2: " + players.get(2));
        
    }
    
}

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