import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;

public class User {
    private String name;
    private Set<String> emails;

    public User(String name, Set<String> emails) {
        this.name = name;
        this.emails = emails;
    }

    @Override
    public String toString() {
        return "User{" +
                "name='" + name + '\'' +
                ", emails=" + emails +
                '}';
    }

    public static void main(String[] args) {
        User usr = new User("User", new HashSet<String>(Arrays.asList("[email protected]", "[email protected]")));
        System.out.println(usr);
    }
}