package zadania.zad1;

public class Main11 {
    public static void main(String[] args) {
        ConcatStrings concatStrings = (a, b, c) -> {
            StringBuilder sb = new StringBuilder();
            sb = sb.append(a).append(b).append(c);
            return sb + " ";
        };
        System.out.println(concatStrings.concat("Ala", "Roman", "Edek"));
        System.out.println(concatStrings.concat("Arnold", "Sylwester", "Rocky"));
    }
}


package zadania.zad1;
@FunctionalInterface
public interface ConcatStrings {
    String concat(String a, String b, String c);
}