javaのimmutableList実装してた（スマホからだと見えないかも）

	import java.util.*;
	public class Main{
	public static void main(String args[]){
	puts(get(push(toList(args), "aaa"), 0));
	immutableListTest(args);
	}
	private static <T> void immutableListTest(String args[]){
	List<String> immutableList = toList(args);
	immutableList = push(immutableList, "hahaha");
	for(String t: immutableList)
	puts(t);
	}
	public static <T> List<T> toList(T[] args){
	return Arrays.asList(args);
	}
	public static <T> List<T> push(List<T> list, T elem){
	List<T> _list = new ArrayList<T>();
	for(T t : list)
	_list.add(t);
	return _list;
	}
	public static <T> T get(List<T> list, Integer i){
	return list.get(i);
	}
	public static <T> void puts(T text){
	System.out.println(text);
	}
	}

view raw Main.java hosted with ❤ by GitHub

mutableとか殺意が湧くんでimmutableをひたすらやってた あとはリスト同士の結合とかやんないとだな