W3School TIY Editor

import java.util.LinkedList; public class Main { public static void main(String[] args) { LinkedList<String> cars = new LinkedList<String>(); cars.add("Volvo"); cars.add("BMW"); cars.add("Ford"); cars.add("Tesla"); cars.add("Toyota"); LinkedList<String> valid = new LinkedList<String>(); valid.add("Volvo"); valid.add("Ford"); valid.add("Tesla"); cars.retainAll(valid); System.out.println(cars); } }