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