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