package com.alvin.util; import java.util.ArrayList; import java.util.Collections; public class ListUtil { public static ArrayList newList(T... list) { ArrayList strings = new ArrayList<>(); Collections.addAll(strings, list); return strings; } public static void main(String[] args) { ArrayList integers = newList(1, 2, 3); ArrayList strings = newList("323", "2234"); System.out.println(integers); } }